CORNERSTONE PROPANE PARTNERS LP
S-3, 1998-08-07
RETAIL STORES, NEC
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<PAGE>
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 7, 1998
                                                      REGISTRATION NO. 333-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                       CORNERSTONE PROPANE PARTNERS, L.P.
 
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                                  <C>                              <C>
             DELAWARE                             5984                          77-0439862
 (State or other jurisdiction of      (Primary Standard Industrial           (I.R.S. Employer
  incorporation or organization)      Classification Code Number)         Identification Number)
</TABLE>
 
                              432 WESTRIDGE DRIVE
                         WATSONVILLE, CALIFORNIA 95076
                                 (831) 724-1921
 
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)
 
                                RONALD J. GOEDDE
                              432 WESTRIDGE DRIVE
                         WATSONVILLE, CALIFORNIA 95076
                                 (831) 724-1921
 
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
 
                           --------------------------
 
                                WITH A COPY TO:
 
                               BARTLEY C. DEAMER
                     MCCUTCHEN, DOYLE, BROWN & ENERSEN, LLP
                               3150 Porter Drive
                              Palo Alto, CA 94304
                                 (650) 849-4400
 
                           --------------------------
 
APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time to
time after this Registration Statement becomes effective.
 
                           --------------------------
 
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, please check the following box. /X/
 
    If the securities being registered on this Form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box. / /
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / /
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. / /
 
                           --------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
                                                                      PROPOSED MAXIMUM     PROPOSED MAXIMUM
            TITLE OF EACH CLASS OF                   AMOUNT TO         OFFERING PRICE          AGGREGATE            AMOUNT OF
         SECURITIES TO BE REGISTERED               BE REGISTERED         PER UNIT(1)       OFFERING PRICE(1)    REGISTRATION FEE
<S>                                             <C>                  <C>                  <C>                  <C>
Common Units..................................       2,500,000             $20.125            $50,312,500          $14,842.19
</TABLE>
 
(1) Calculated in accordance with Rule 457(c) on the basis of the average of the
    high and low sale prices of the Common Units on August 5, 1998 , as reported
    on the New York Stock Exchange composite tape.
 
                           --------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
                             SUBJECT TO COMPLETION
PROSPECTUS (SUBJECT TO COMPLETION)
ISSUED AUGUST 7, 1998
 
                             2,500,000 COMMON UNITS
                     REPRESENTING LIMITED PARTNER INTERESTS
 
                       CORNERSTONE PROPANE PARTNERS, L.P.
                                ---------------
 
    This Prospectus relates to up to 2,500,000 Common Units representing limited
partner interests in Cornerstone Propane Partners, L.P., a Delaware limited
partnership (the "Partnership"), which may be offered from time to time by the
Partnership at prices and on terms to be determined at the time of each offering
hereunder and to be set forth in one or more supplements to this Prospectus
(each, a "Prospectus Supplement"). The Partnership's Common Units are listed on
the New York Stock Exchange (the "NYSE") under the symbol "CNO."
 
                            ------------------------
 
    The Partnership has registered with the Secretary of the Treasury as a "tax
shelter." No assurance can be given that the Partnership will not be audited by
the IRS or that tax adjustments will not be made. Any adjustments in the
Partnership's tax returns will lead to adjustments in the Unitholders' tax
returns and may lead to audits of the Unitholders' tax returns and adjustments
of items unrelated to the Partnership.
 
                            ------------------------
 
    LIMITED PARTNER INTERESTS ARE INHERENTLY DIFFERENT FROM CAPITAL STOCK OF A
CORPORATION. PURCHASERS OF COMMON UNITS SHOULD CONSIDER EACH OF THE FACTORS
DESCRIBED UNDER "RISK FACTORS," STARTING ON PAGE 9, IN EVALUATING AN INVESTMENT
IN THE PARTNERSHIP.
 
                            ------------------------
 
    The Partnership will distribute to its partners, on a quarterly basis, all
of its Available Cash, which is generally all cash on hand at the end of a
quarter, as adjusted for reserves. The Managing General Partner has broad
discretion in making cash disbursements and establishing reserves. The
Partnership intends, to the extent there is sufficient Available Cash, to
distribute to each holder of Common Units at least $.54 per Common Unit per
quarter (the "Minimum Quarterly Distribution") or $2.16 per Common Unit on an
annualized basis.
 
                            ------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
   SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
     PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
                REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
    The Common Units may be offered through underwriters, brokers or dealers, or
directly to investors. See "Plan of Distribution." The Prospectus Supplement
will set forth the names of any underwriters, brokers or dealers involved in the
sale of Common Units and any applicable fee, commission or discount arrangements
with them.
 
    This Prospectus may not be used to consummate sales of Common Units unless
accompanied by a Prospectus Supplement.
 
August   , 1998
<PAGE>
                             AVAILABLE INFORMATION
 
    The Partnership is subject to the informational requirements of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in
accordance therewith files reports and other information with the Securities and
Exchange Commission (the "Commission"). Such reports and other information can
be inspected and copied at the public reference facilities maintained by the
Commission at Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549; 500
West Madison Street, Suite 1400, Chicago, Illinois 60661; and 7 World Trade
Center, Suite 1300, New York, New York 10048. Copies of such material can also
be obtained from the Public Reference Room of the Commission at 450 Fifth
Street, N.W., Room 1024, Washington, D.C. 20549, at prescribed rates.
Information regarding operation of the Public Reference Room may be obtained by
calling the Commission at 1-800-SEC-0330. The Commission also maintains an
Internet site that contains reports, proxy and information statements, and other
information regarding issuers that file electronically with the Commission at
http://www.sec.gov. The Partnership's Common Units are listed on the New York
Stock Exchange, and reports and other information concerning the Partnership can
be inspected and copied at the offices of such exchange at 20 Broad Street, New
York, New York 10005.
 
    This Prospectus constitutes a part of a Registration Statement on Form S-3
(together with all amendments and exhibits thereto, the "Registration
Statement") filed by the Partnership with the Commission under the Securities
Act of 1933, as amended (the "Securities Act") with respect to the Common Units
offered hereby. This Prospectus does not contain all of the information set
forth in the Registration Statement, certain parts of which are omitted in
accordance with the rules and regulations of the Commission. Reference is made
to the Registration Statement for further information with respect to the
Partnership and the Common Units offered hereby. Any statements contained herein
concerning the provisions of any document filed as an exhibit to the
Registration Statement or otherwise filed with the Commission or incorporated by
reference herein are not necessarily complete, and in each instance reference is
made to the copy of such document so filed for a more complete description of
the matter involved. Each such statement is qualified in its entirety by such
reference.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
    THIS PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE WHICH ARE NOT PRESENTED
HEREIN OR DELIVERED HEREWITH. COPIES OF THESE DOCUMENTS (EXCLUDING EXHIBITS
THERETO UNLESS SUCH EXHIBITS ARE SPECIFICALLY INCORPORATED BY REFERENCE INTO
SUCH DOCUMENTS) ARE AVAILABLE WITHOUT CHARGE UPON ORAL OR WRITTEN REQUEST OF ANY
PERSON, INCLUDING ANY BENEFICIAL OWNER, FROM RONALD J. GOEDDE, CORNERSTONE
PROPANE PARTNERS, L.P., AT ITS PRINCIPAL EXECUTIVE OFFICES, 432 WESTRIDGE DRIVE,
WATSONVILLE, CALIFORNIA 95076 (TELEPHONE: (831) 724-1921).
 
    The following documents filed with the Commission by the Partnership (File
No. 1-12499) pursuant to Section 13(a) of the Exchange Act are incorporated
herein by reference as of their respective dates:
 
    (a) Annual Report on Form 10-K for the year ended June 30, 1997;
 
    (b) Quarterly Report on Form 10-Q for the quarters ended September 30, 1997,
December 31, 1997 and March 31, 1998; and
 
    (c) The description on the Common Units contained in the Partnership's
Registration Statement on Form 8-A dated November 25, 1996.
 
    Each document filed by the Partnership pursuant to Section 13(a), 13(c), 14
or 15(d) of the Exchange Act subsequent to the date of this Prospectus and prior
to the termination of the offering of the Common Units pursuant hereto shall be
deemed to be incorporated herein by reference and to be a part hereof from the
date of filing of such document. Any statement contained herein or in a document
all or a portion of
 
                                       i
<PAGE>
which is incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or superseded for purposes of this Prospectus to the
extent that a statement contained herein or in any other subsequently filed
document which also is or is deemed to be incorporated by reference herein
modifies or supersedes such statement. Any statement so modified or superseded
shall not be deemed, except as so modified or superseded, to constitute a part
of this Prospectus.
 
    NO PERSON IS AUTHORIZED IN CONNECTION WITH ANY OFFERING MADE HEREBY TO GIVE
ANY INFORMATION OR TO MAKE ANY REPRESENTATION OTHER THAN AS CONTAINED IN THIS
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE
RELIED UPON AS HAVING BEEN AUTHORIZED BY THE PARTNERSHIP OR ANY UNDERWRITER.
THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY ANY OF THE SECURITIES OFFERED HEREBY TO ANY PERSON IN ANY
JURISDICTION IN WHICH IT IS UNLAWFUL TO MAKE ANY SUCH OFFER OR SOLICITATION.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS NOT BEEN A CHANGE IN
THE FACTS SET FORTH IN THIS PROSPECTUS OR IN THE AFFAIRS OF THE PARTNERSHIP
SINCE THE DATE HEREOF.
 
                                       ii
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                                PAGE
                                                                                                                -----
<S>                                                                                                          <C>
AVAILABLE INFORMATION......................................................................................           i
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE............................................................           i
PROSPECTUS SUMMARY.........................................................................................           1
  The Partnership..........................................................................................           1
  Summary Pro Forma and Historical Financial and Operating Data............................................           2
  The Offering.............................................................................................           4
RISK FACTORS...............................................................................................           9
  Risks Inherent in the Partnership's Business.............................................................           9
  Risks Inherent in an Investment in the Partnership.......................................................          11
  Conflicts of Interest and Fiduciary Responsibilities.....................................................          15
  Tax Risks................................................................................................          17
USE OF PROCEEDS............................................................................................          20
SELECTED FINANCIAL AND OPERATING DATA......................................................................          21
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS......................          26
  General..................................................................................................          26
  Analysis of Results of Operations........................................................................          26
  Liquidity and Capital Resources..........................................................................          28
  Recently Issued Accounting Standards.....................................................................          29
  Year 2000 Compliance.....................................................................................          29
BUSINESS...................................................................................................          30
  General..................................................................................................          30
  Business Strategy........................................................................................          31
PARTNERSHIP STRUCTURE AND MANAGEMENT.......................................................................          33
DESCRIPTION OF THE COMMON UNITS............................................................................          35
  The Units................................................................................................          35
  Transfer Agent and Registrar.............................................................................          35
  Transfer of Common Units.................................................................................          35
CASH DISTRIBUTION POLICY...................................................................................          36
  General..................................................................................................          36
  Quarterly Distributions of Available Cash................................................................          37
  Distributions from Operating Surplus During Subordination Period.........................................          38
  Distributions from Operating Surplus after Subordination Period..........................................          39
  Incentive Distributions--Hypothetical Annualized Yield...................................................          40
  Distributions from Capital Surplus.......................................................................          41
  Adjustment of Minimum Quarterly Distribution and Target Distribution Levels..............................          41
  Distributions of Cash Upon Liquidation...................................................................          42
CASH AVAILABLE FOR DISTRIBUTION............................................................................          44
THE PARTNERSHIP AGREEMENT..................................................................................          46
  Organization and Duration................................................................................          46
  Purpose..................................................................................................          46
  Power of Attorney........................................................................................          47
  Capital Contributions....................................................................................          47
  Limited Liability........................................................................................          47
  Issuance of Additional Securities........................................................................          48
  Amendment of Partnership Agreement.......................................................................          49
  Merger, Sale or Other Disposition of Assets..............................................................          50
  Termination and Dissolution..............................................................................          51
</TABLE>
 
                                      iii
<PAGE>
<TABLE>
<S>                                                                                                          <C>
  Liquidation and Distribution of Proceeds.................................................................          51
  Withdrawal or Removal of the General Partners............................................................          51
  Transfer of General Partners' Interests and Incentive Distribution Rights................................          53
  Change of Management Provisions..........................................................................          53
  Limited Call Right.......................................................................................          53
  Meetings; Voting.........................................................................................          54
  Status as Limited Partner or Assignee....................................................................          55
  Non-Citizen Assignees; Redemption........................................................................          55
  Indemnification..........................................................................................          55
  Books and Reports........................................................................................          56
  Right to Inspect Partnership Books and Records...........................................................          56
  Registration Rights......................................................................................          57
CONFLICTS OF INTEREST AND FIDUCIARY RESPONSIBILITIES.......................................................          57
  Conflicts of Interest....................................................................................          57
  Fiduciary and Other Duties...............................................................................          59
TAX CONSIDERATIONS.........................................................................................          61
  Tax Rates................................................................................................          62
  Partnership Status.......................................................................................          62
  Consequences of Exchanging Property for Common Units.....................................................          63
  Ownership of Units by S Corporations.....................................................................          64
  Limited Partner Status...................................................................................          66
  Tax Consequences of Unit Ownership.......................................................................          66
  Allocation of Partnership Income, Gain, Loss and Deduction...............................................          68
  Tax Treatment of Operations..............................................................................          69
  Disposition of Common Units..............................................................................          72
  Uniformity of Units......................................................................................          74
  Administrative Matters...................................................................................          76
  State, Local and Other Tax Considerations................................................................          78
UNITS ELIGIBLE FOR FUTURE SALE.............................................................................          79
PLAN OF DISTRIBUTION.......................................................................................          80
VALIDITY OF THE COMMON UNITS...............................................................................          80
EXPERTS....................................................................................................          80
APPENDIX A.................................................................................................         A-1
</TABLE>
 
                                       iv
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY, AND SHOULD BE READ IN
CONJUNCTION WITH, THE MORE DETAILED INFORMATION AND HISTORICAL AND PRO FORMA
FINANCIAL DATA INCORPORATED BY REFERENCE IN THIS PROSPECTUS. THE MANAGING
GENERAL PARTNER OF THE PARTNERSHIP IS CORNERSTONE PROPANE GP, INC. (THE
"MANAGING GENERAL PARTNER"), A WHOLLY-OWNED SUBSIDIARY OF NORTHWESTERN GROWTH
CORPORATION ("NORTHWESTERN GROWTH"). EXCEPT AS THE CONTEXT OTHERWISE REQUIRES,
REFERENCES TO, OR DESCRIPTIONS OF, THE ASSETS, BUSINESS AND OPERATIONS OF THE
PARTNERSHIP INCLUDE THE PROPANE ASSETS, BUSINESSES AND OPERATIONS OF SYN INC.
("SYNERGY"; IN ITS CAPACITY AS THE SPECIAL GENERAL PARTNER OF THE PARTNERSHIP,
THE "SPECIAL GENERAL PARTNER" AND, TOGETHER WITH THE MANAGING GENERAL PARTNER,
THE "GENERAL PARTNERS"), EMPIRE ENERGY CORPORATION ("EMPIRE ENERGY") AND CGI
HOLDINGS, INC. ("COAST") AS CONDUCTED PRIOR TO THE INITIAL PUBLIC OFFERING OF
COMMON UNITS IN DECEMBER 1996 (THE "IPO"). INFORMATION IN THIS PROSPECTUS
RELATED TO THE PRO FORMA YEAR ENDED JUNE 30, 1997, REFLECTS A FULL YEAR OF
ACTIVITY FOR THE THREE PREDECESSOR COMPANIES, AS IF THE PARTNERSHIP HAD BEEN IN
OPERATION ON JULY 1, 1996. CAPITALIZED TERMS NOT DEFINED HEREIN HAVE THE
MEANINGS GIVEN IN THE GLOSSARY INCLUDED AS APPENDIX A.
 
                                THE PARTNERSHIP
 
    The Partnership believes that it is the fifth largest retail marketer of
propane in the United States in terms of volume, serving more than 380,000
residential, commercial, industrial and agricultural customers from 301 customer
service centers in 27 states as of March 31, 1998. The Partnership's operations
are concentrated in the east coast, south-central and west coast regions of the
United States. For the fiscal year ended June 30, 1997, the Partnership had
combined retail propane sales of approximately 214 million gallons and pro forma
operating income plus depreciation and amortization ("EBITDA") of approximately
$41.0 million. The Partnership was formed in 1996 to acquire, own and operate
the propane businesses and assets of Synergy, Empire Energy and Coast and
commenced operations on December 17, 1996.
 
    The Partnership believes that it is well positioned to compete successfully
in the propane business for the following reasons: (i) management's experience
in generating profitable growth at its customer service centers by fostering an
entrepreneurial approach by local managers; (ii) the Partnership's large
national and geographically diversified operations, which the Partnership
believes reduces the effects of adverse weather conditions in any one region on
EBITDA and allows it to achieve economies of scale; (iii) the significant
proportion of the Partnership's retail sales that is made to residential
customers, which are generally more profitable than sales to other customers;
(iv) management's experience in identifying, evaluating and completing both
small and large acquisitions; (v) the Partnership's substantial national
wholesale supply and logistics business, which provides it with a national
presence and a relatively secure source of propane to support the service goals
of its customer service centers; (vi) the Partnership's centralized
administrative systems that enable local managers to focus on customer service
and growth; and (vii) the Partnership's relationship with Northwestern Growth (a
subsidiary of Northwestern Corporation ("NOR")), which has proven experience in
the energy distribution business and in the acquisition and growth of propane
businesses.
 
    Although the Partnership believes it has a number of competitive strengths,
the propane industry is highly competitive and includes a number of large
national firms and regional firms and several thousand small independent firms.
Certain competitors may have greater financial resources or lower operating
costs than the Partnership. Further, variations in the weather or the economy in
one or more regions in which the Partnership operates can significantly affect
the total volume of propane sold by the Partnership and, consequently, the
Partnership's results of operations. See "Risk Factors."
 
    The Partnership's principal executive offices are located at 432 Westridge
Drive, Watsonville, California 95076, and its telephone number is (831)
724-1921.
 
                                       1
<PAGE>
         SUMMARY PRO FORMA AND HISTORICAL FINANCIAL AND OPERATING DATA
 
    The following summary pro forma financial and operating data are derived
from the pro forma consolidated financial statements of Cornerstone Propane
Partners, L.P. incorporated by reference in this Prospectus. The pro forma
information for the fiscal year ended June 30, 1997 set forth below has been
prepared by combining the historical results of operations of Synergy for the
five and one-half months ended December 16, 1996; Empire Energy for the five and
one-half months ended December 16, 1996; Coast for the four and one-half months
ended December 16, 1996; and the Partnership for the six and one-half months
ended June 30, 1997. The pro forma information for the nine months ended March
31, 1997 set forth below has been prepared by combining the historical results
of operations of Synergy for the five and one-half months ended December 16,
1996; Empire Energy for the five and one-half months ended December 16, 1996;
Coast for the four and one-half months ended December 16, 1996; and the
Partnership for the period from December 17, 1996 to March 31, 1997. The
historical financial and operating data for the nine months ended March 31, 1998
are derived from the Partnership's unaudited consolidated financial statements
incorporated by reference in this Prospectus and, in the opinion of management,
include all adjustments necessary for a fair presentation of such information.
The Partnership believes that it is reasonable to combine the results of
operations of companies having different fiscal years because each of the fiscal
years being combined includes the same winter heating seasons in which the
majority of the Partnership's revenue and cash flow was generated. The financial
and operating data for the nine month periods ended March 31, 1998 and 1997 are
not necessarily indicative of the results of operations for the full fiscal
years. The following information should not be deemed indicative of future
operating results of the Partnership.
 
<TABLE>
<CAPTION>
                                                             FISCAL YEAR
                                                                ENDED      NINE MONTHS ENDED   NINE MONTHS ENDED
                                                            JUNE 30, 1997    MARCH 31, 1997      MARCH 31, 1998
                                                             (PRO FORMA)      (PRO FORMA)           (ACTUAL)
                                                            -------------  ------------------  ------------------
                                                                               (IN THOUSANDS)
<S>                                                         <C>            <C>                 <C>
STATEMENT OF OPERATIONS DATA:
Revenue...................................................   $   664,197       $  535,503          $  623,267
Cost of sales.............................................       534,892          428,959             505,302
                                                            -------------        --------            --------
Gross profit..............................................       129,305          106,544             117,965
 
Operating, general and administrative expenses............        88,264           66,209              72,757
Depreciation and amortization.............................        15,073           10,948              13,615
                                                            -------------        --------            --------
Operating income..........................................        25,968           29,387              31,593
Interest expense..........................................        18,215           13,499              14,641
                                                            -------------        --------            --------
Net income before income taxes............................         7,753           15,888              16,952
Income taxes..............................................           109               70                  95
                                                            -------------        --------            --------
Net income................................................   $     7,644       $   15,818          $   16,857
                                                            -------------        --------            --------
                                                            -------------        --------            --------
</TABLE>
 
                                       2
<PAGE>
 
<TABLE>
<CAPTION>
                                                             FISCAL YEAR
                                                                ENDED      NINE MONTHS ENDED   NINE MONTHS ENDED
                                                            JUNE 30, 1997    MARCH 31, 1997      MARCH 31, 1998
                                                             (PRO FORMA)      (PRO FORMA)           (ACTUAL)
                                                            -------------  ------------------  ------------------
                                                                               (IN THOUSANDS)
<S>                                                         <C>            <C>                 <C>
BALANCE SHEET DATA:
  (AS OF MARCH 31, 1998)
Current assets............................................                                         $   63,905
Total assets..............................................                                            580,224
Current liabilities.......................................                                             47,160
Long-term debt (including current maturities).............                                            237,089
Partners capital--General Partners........................                                              5,970
Partners' capital--Limited Partners.......................                                            288,314
Capital expenditures(a)...................................   $    15,977       $   13,964          $   25,078
EBITDA(b).................................................   $    41,041       $   40,335          $   45,208
Net income per Unit(c)                                       $       .46       $      .94          $      .92
Retail propane gallons sold...............................       213,700          183,100             199,700
</TABLE>
 
- ------------------------
 
(a) Capital expenditures fall generally into three categories: (i) growth
    capital expenditures, which include expenditures for the purchase of new
    propane tanks and other equipment to facilitate expansion of the
    Partnership's retail customer base, (ii) maintenance capital expenditures,
    which include expenditures for repairs that extend the life of the assets
    and replacement of property, plant and equipment, and (iii) acquisition
    capital expenditures.
 
(b) EBITDA consists of net income before depreciation, amortization, interest
    and income taxes. EBITDA should not be considered as an alternative to net
    income (as an indicator of operating performance) or as an alternative to
    cash flow, and it is not a measure of performance or financial condition
    under generally accepted accounting principles, but it provides additional
    information for evaluating the Partnership's ability to distribute the
    minimum quarterly distribution of $.54 per Common Unit per quarter (the
    "Minimum Quarterly Distribution") and to service and incur indebtedness.
    Cash flows in accordance with generally accepted accounting principles
    consist of cash flows from operating, investing and financing activities;
    cash flows from operating activities reflect net income (including charges
    for interest and income taxes, which are not reflected in EBITDA), adjusted
    for noncash charges or income (which are reflected in EBITDA) and changes in
    operating assets and liabilities (which are not reflected in EBITDA).
    Further, cash flows from investing and financing activities are not included
    in EBITDA.
 
(c) Net income per Unit is computed by dividing the limited partners' interest
    in net income by the weighted average number of Common Units and
    subordinated limited partnership interests in the Partnership ("Subordinated
    Units") outstanding.
 
                                       3
<PAGE>
                                  THE OFFERING
 
<TABLE>
<S>                                 <C>
Securities Offered................  2,500,000 Common Units.
 
Units Outstanding As of the Date
  of This Prospectus..............  13,234,411 Common Units and 6,597,619 Subordinated
                                    Units, representing an aggregate 65.4% and 32.6% limited
                                    partner interest in the Partnership, respectively.
 
Distributions of Available Cash...  The Partnership will distribute all of its Available
                                    Cash within 45 days after the end of each quarter to the
                                    Unitholders of record on the applicable record date and
                                    to the General Partners. "Available Cash" for any
                                    quarter will consist generally of all cash on hand at
                                    the end of such quarter, as adjusted for reserves. The
                                    Managing General Partner has broad discretion in making
                                    cash disbursements and establishing reserves, thereby
                                    affecting the amount of Available Cash that will be
                                    distributed with respect to any quarter. In addition,
                                    the terms of the Partnership's indebtedness require that
                                    certain reserves for the payment of principal and
                                    interest be maintained. See "Risk Factors--Risks
                                    Inherent in an Investment in the Partnership--Cash
                                    Distributions Are Not Guaranteed and May Fluctuate with
                                    Partnership Performance" for a description of the
                                    reserves for the payment of principal and interest that
                                    the Partnership will be required to maintain. Available
                                    Cash will generally be distributed 98% to Unitholders
                                    and 2% to the General Partners, except that if
                                    distributions of Available Cash from Operating Surplus
                                    exceed specified target levels ("Target Distribution
                                    Levels") in excess of the Minimum Quarterly
                                    Distribution, the General Partners will receive a
                                    percentage of such excess distributions that will
                                    increase to up to 50% of the excess distributions above
                                    the highest Target Distribution Level. See "Cash
                                    Distribution Policy--Incentive Distributions--
                                    Hypothetical Annualized Yield."
 
Distributions to Common and
  Subordinated Unitholders........  The Partnership intends, to the extent there is
                                    sufficient Available Cash from Operating Surplus, to
                                    distribute to each holder of Common Units at least the
                                    Minimum Quarterly Distribution of $.54 per Common Unit
                                    per quarter. The Minimum Quarterly Distribution is not
                                    guaranteed and is subject to adjustment as described
                                    under "Cash Distribution Policy--Adjustment of Minimum
                                    Quarterly Distribution and Target Distribution Levels."
 
                                    With respect to each quarter during the Subordination
                                    Period, which will generally not end prior to December
                                    31, 2001, the Common Unitholders generally have the
                                    right to receive the Minimum Quarterly Distribution,
                                    plus any arrearages thereon ("Common Unit Arrearages"),
                                    and the General Partners have the right to receive the
                                    related distribution on the general partner interests,
                                    before any distribution of Available Cash from Operating
                                    Surplus is made to the Subordinated Unitholders. This
                                    subordination feature enhances the Partnership's ability
                                    to
</TABLE>
 
                                       4
<PAGE>
 
<TABLE>
<S>                                 <C>
                                    distribute the Minimum Quarterly Distribution on the
                                    Common Units during the Subordination Period.
                                    Subordinated Units do not accrue distribution
                                    arrearages. Upon expiration of the Subordination Period,
                                    Common Units will no longer accrue distribution
                                    arrearages. See "Cash Distribution Policy."
 
Adjustment of Minimum Quarterly
  Distribution and Target
  Distribution Levels.............  The Minimum Quarterly Distribution and the Target
                                    Distribution Levels are subject to downward adjustments
                                    in the event that the Unitholders receive distributions
                                    of Available Cash from Capital Surplus or legislation is
                                    enacted or existing law is modified or interpreted by
                                    the relevant governmental authority in a manner that
                                    causes the Partnership to be treated as an association
                                    taxable as a corporation or otherwise taxable as an
                                    entity for federal, state or local income tax purposes.
                                    Distributions of Available Cash from Capital Surplus
                                    represent a "return of capital" rather than a "return on
                                    capital." If, as a result of distributions of Available
                                    Cash from Capital Surplus, the Unitholders receive an
                                    amount equal to the initial public offering price of the
                                    Common Units and any unpaid Common Unit Arrearages, the
                                    distributions of Available Cash payable to the General
                                    Partners and their affiliates will increase to 50% of
                                    all amounts distributed thereafter. See "Cash
                                    Distribution Policy--General," "--Distributions from
                                    Capital Surplus" and "--Adjustment of Minimum Quarterly
                                    Distribution and Target Distribution Levels."
 
Subordination Period..............  The Subordination Period will generally extend until the
                                    first day of any quarter beginning after December 31,
                                    2001 in respect of which (i) distributions of Available
                                    Cash from Operating Surplus on the Common Units and the
                                    Subordinated Units with respect to each of the three
                                    consecutive four-quarter periods immediately preceding
                                    such date equaled or exceeded the sum of the Minimum
                                    Quarterly Distribution on all of the outstanding Common
                                    Units and Subordinated Units during such periods, (ii)
                                    the Adjusted Operating Surplus generated during each of
                                    the three consecutive four-quarter periods immediately
                                    preceding such date equaled or exceeded the sum of the
                                    Minimum Quarterly Distribution on all of the outstanding
                                    Common Units and Subordinated Units and the related
                                    distribution on the general partner interests in the
                                    Partnership during such periods, and (iii) there are no
                                    outstanding Common Unit Arrearages. Upon expiration of
                                    the Subordination Period, all remaining Subordinated
                                    Units will convert into Common Units on a one-for-one
                                    basis and will thereafter participate pro rata with the
                                    other Common Units in distributions of Available Cash.
 
Early Conversion of Subordinated
  Units...........................  One quarter of the Subordinated Units will convert into
                                    Common Units on the first day after the record date
                                    established for the distribution in respect of any
                                    quarter ending on or after
</TABLE>
 
                                       5
<PAGE>
 
<TABLE>
<S>                                 <C>
                                    December 31, 2000, in respect of which (i) distributions
                                    of Available Cash from Operating Surplus on the Common
                                    Units and the Subordinated Units with respect to each of
                                    the three consecutive four-quarter periods immediately
                                    preceding such date equaled or exceeded the sum of the
                                    Minimum Quarterly Distribution on all of the outstanding
                                    Common Units and Subordinated Units during such periods,
                                    (ii) the Adjusted Operating Surplus generated during
                                    each of the two consecutive four-quarter periods
                                    immediately preceding such date equaled or exceeded the
                                    sum of the Minimum Quarterly Distribution on all of the
                                    outstanding Common Units and Subordinated Units and the
                                    related distribution on the general partner interests in
                                    the Partnership during such periods, and (iii) there are
                                    no outstanding Common Unit Arrearages.
 
Incentive Distributions...........  If quarterly distributions of Available Cash exceed the
                                    Target Distribution Levels, the General Partners will
                                    receive distributions which are generally equal to 15%,
                                    then 25% and then 50% of the distributions of Available
                                    Cash that exceed such Target Distribution Levels. The
                                    Target Distribution Levels are based on the amounts of
                                    Available Cash from Operating Surplus distributed with
                                    respect to a given quarter that exceed distributions
                                    made with respect to the Minimum Quarterly Distribution
                                    and Common Unit Arrearages, if any. See "Cash
                                    Distribution Policy--Incentive
                                    Distributions--Hypothetical Annualized Yield." The
                                    distributions to the General Partners described above
                                    that are in excess of their aggregate 2% general partner
                                    interest are referred to herein as the "Incentive
                                    Distributions."
 
Partnership's Ability to Issue
  Additional Units................  The Partnership Agreement generally authorizes the
                                    Partnership to issue an unlimited number of additional
                                    limited partner interests and other equity securities of
                                    the Partnership for such consideration and on such terms
                                    and conditions as shall be established by the Managing
                                    General Partner in its sole discretion without the
                                    approval of the Unitholders. During the Subordination
                                    Period, however, the Partnership may not issue equity
                                    securities ranking prior or senior to the Common Units
                                    or an aggregate of more than 4,270,000 Common Units
                                    (excluding Common Units issued upon conversion of
                                    Subordinated Units, pursuant to employee benefit plans
                                    or in connection with certain acquisitions or capital
                                    improvements or the repayment of certain indebtedness)
                                    or an equivalent number of securities ranking on a
                                    parity with the Common Units, without the approval of
                                    the holders of a Unit Majority. See "The Partnership
                                    Agreement-- Issuance of Additional Securities."
 
Limited Call Right................  If at any time less than 20% of the issued and
                                    outstanding Common Units are held by persons other than
                                    the Managing General Partner and its affiliates, the
                                    Managing General Partner may purchase all of the
                                    remaining Common Units at a price
</TABLE>
 
                                       6
<PAGE>
 
<TABLE>
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                                    generally equal to the then current market price of the
                                    Common Units. See "The Partnership Agreement--Limited
                                    Call Right."
 
Limited Voting Rights.............  Unitholders do not have voting rights except with
                                    respect to the following matters, for which the
                                    Partnership Agreement requires the approval of the
                                    holders of at least a majority (and in certain cases a
                                    greater percentage) of the Subordinated Units and the
                                    Common Units: a sale or exchange of all or substantially
                                    all of the Partnership's assets, the removal or the
                                    withdrawal of the General Partners, the election of a
                                    successor Managing General Partner, a dissolution or
                                    reconstitution of the Partnership, a merger of the
                                    Partnership, issuance of limited partner interests in
                                    certain circumstances, approval of certain actions of
                                    the General Partners (including the transfer by either
                                    of the General Partners of its general partner interest
                                    or Incentive Distribution Rights under certain
                                    circumstances) and certain amendments to the Partnership
                                    Agreement, including any amendment that would cause the
                                    Partnership to be treated as an association taxable as a
                                    corporation. Holders of Subordinated Units will
                                    generally vote as a class separate from the holders of
                                    Common Units. After Subordinated Units convert into
                                    Common Units (either upon termination of the
                                    Subordination Period or upon early conversion), holders
                                    of such Common Units will vote as a single class
                                    together with the holders of the other Common Units.
                                    Under the Partnership Agreement, the Managing General
                                    Partner generally is permitted to effect amendments to
                                    the Partnership Agreement that do not adversely affect
                                    Unitholders. See "The Partnership Agreement."
 
Change of Management Provisions...  Any person or group (other than the Managing General
                                    Partner and its affiliates) that acquires beneficial
                                    ownership of 20% or more of the Common Units will lose
                                    its voting rights with respect to all of its Common
                                    Units. In addition, if the Managing General Partner is
                                    removed other than for Cause and Units held by the
                                    General Partners and their affiliates are not voted in
                                    favor of such removal, (i) the Subordination Period will
                                    end and all outstanding Subordinated Units will
                                    immediately convert into Common Units on a one-for-one
                                    basis, (ii) any existing Common Unit Arrearages will be
                                    extinguished and (iii) the General Partners will have
                                    the right to convert their general partner interests
                                    (and their rights to receive Incentive Distributions)
                                    into Common Units or to receive cash in exchange for
                                    such interests. These provisions are intended to
                                    discourage a person or group from attempting to remove
                                    the current Managing General Partner or otherwise change
                                    the management of the Partnership. The effect of these
                                    provisions may be to diminish the price at which the
                                    Common Units trade under certain circumstances. See "The
                                    Partnership Agreement--Change of Management Provisions."
 
Removal and Withdrawal of the
  General Partners................  Subject to certain conditions, the Managing General
                                    Partner may be removed upon the approval of the holders
                                    of at least
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                                       7
<PAGE>
 
<TABLE>
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                                    66 2/3% of the outstanding Units (including Units held
                                    by the General Partners and their affiliates) and the
                                    election of a successor general partner by the vote of
                                    the holders of not less than a majority of the
                                    outstanding Units. A meeting of holders of the Common
                                    Units may be called only by the Managing General Partner
                                    or by the holders of 20% or more of the outstanding
                                    Common Units. The ownership of the Subordinated Units by
                                    the Managing General Partner and its affiliates
                                    effectively gives the Managing General Partner the
                                    ability to prevent its removal. The Managing General
                                    Partner has agreed not to voluntarily withdraw as
                                    general partner of the Partnership and Cornerstone
                                    Propane, L.P. (the "Operating Partnership") prior to
                                    December 31, 2006, subject to limited exceptions,
                                    without obtaining the approval of at least a Unit
                                    Majority and furnishing an Opinion of Counsel (as
                                    defined in the Glossary). The Special General Partner
                                    must withdraw or be removed as a general partner upon
                                    the withdrawal or removal of the Managing General
                                    Partner. See "The Partnership Agreement-- Withdrawal or
                                    Removal of the General Partners" and "--Meetings;
                                    Voting."
 
Distributions Upon Liquidation....  If the Partnership liquidates during the Subordination
                                    Period, under certain circumstances holders of
                                    outstanding Common Units will be entitled to receive
                                    more per Unit in liquidating distributions than holders
                                    of outstanding Subordinated Units. The per Unit
                                    difference will be dependent upon the amount of gain or
                                    loss recognized by the Partnership in liquidating its
                                    assets and will be limited to the Unrecovered Capital of
                                    a Common Unit and any Common Unit Arrearages thereon.
                                    Under certain circumstances there may be insufficient
                                    gain for the holders of Common Units to fully recover
                                    all such amounts, even though there may be cash
                                    available for distribution to holders of Subordinated
                                    Units. Following conversion of the Subordinated Units
                                    into Common Units, all Units will be treated the same
                                    upon liquidation of the Partnership. See "Cash
                                    Distribution Policy--Distributions of Cash Upon
                                    Liquidation."
 
Listing...........................  The Common Units are listed on the New York Stock
                                    Exchange. Application will be made to list the Common
                                    Units offered hereby on the New York Stock Exchange.
 
NYSE Symbol.......................  CNO.
</TABLE>
 
                                       8
<PAGE>
                                  RISK FACTORS
 
    LIMITED PARTNER INTERESTS ARE INHERENTLY DIFFERENT FROM CAPITAL STOCK OF A
CORPORATION, ALTHOUGH MANY OF THE BUSINESS RISKS TO WHICH THE PARTNERSHIP IS
SUBJECT ARE SIMILAR TO THOSE THAT WOULD BE FACED BY A CORPORATION ENGAGED IN A
SIMILAR BUSINESS. PROSPECTIVE PURCHASERS OF THE COMMON UNITS SHOULD CONSIDER THE
FOLLOWING RISK FACTORS IN EVALUATING AN INVESTMENT IN THE COMMON UNITS.
 
RISKS INHERENT IN THE PARTNERSHIP'S BUSINESS
 
    WEATHER CONDITIONS AFFECT THE DEMAND FOR PROPANE
 
    Weather conditions have a significant impact on the demand for propane for
both heating and agricultural purposes. Many customers of the Partnership rely
heavily on propane as a heating fuel. Accordingly, the volume of retail propane
sold is highest during the six-month peak heating season of October through
March and is directly affected by the severity of the winter weather. During
fiscal 1997, approximately 68.8% of the Partnership's combined retail propane
volume and approximately 90% of the Partnership's pro forma EBITDA were
attributable to sales during the peak heating season. Actual weather conditions
can vary substantially from year to year, significantly affecting the
Partnership's financial performance. For example, during the nine months ended
March 31, 1998, the impact of the recent El Nino winter adversely impacted
average customer sales due to the reduced heating degree days during the winter
months in the markets served by the Partnership. The Partnership cannot predict
if or when a similar weather phenomenon will affect the markets served by the
Partnership.
 
    Furthermore, variations in weather in one or more regions in which the
Partnership operates can significantly affect the total volume of propane sold
by the Partnership and the margins realized on such sales and, consequently, the
Partnership's results of operations. Agricultural demand is also affected by
weather, as dry weather during the harvest season reduces demand for propane
used in crop drying.
 
    THE PARTNERSHIP WILL BE SUBJECT TO PRICING AND INVENTORY RISKS
 
    The retail propane business is a "margin-based" business in which gross
profits depend on the excess of sales prices over propane supply costs.
Consequently, the Partnership's profitability will be sensitive to changes in
wholesale propane prices. Propane is a commodity, the market price of which can
be subject to volatile changes in response to changes in supply or other market
conditions. The Partnership will have no control over these market conditions.
Consequently, the unit price of propane purchased by the Partnership, as well as
other propane marketers, can change rapidly over a short period of time. In
general, product supply contracts permit suppliers to charge posted prices (plus
transportation costs) at the time of delivery or the current prices established
at major delivery points. As it may not be possible immediately to pass on to
customers rapid increases in the wholesale cost of propane, such increases could
reduce the Partnership's gross profits. See "--The Retail Propane Business Is
Highly Competitive."
 
    Propane is available from numerous sources, including integrated
international oil companies, independent refiners and independent wholesalers.
The Partnership purchases propane from a variety of suppliers pursuant to supply
contracts or on the spot market. To the extent that the Partnership purchases
propane from foreign (including Canadian) sources, its propane business will be
subject to risks of disruption in foreign supply. The Partnership generally
attempts to minimize inventory risk by purchasing propane on a short-term basis.
However, the Partnership may purchase large volumes of propane during periods of
low demand, which generally occur during the summer months, at the then current
market price. Because of the potential volatility of propane prices, if the
Partnership makes such purchases, the market price for propane could fall below
the price at which the Partnership made the purchases, thereby adversely
affecting gross margins or sales or rendering sales from such inventory
unprofitable. The Partnership engages in hedging of product cost and supply
through common hedging practices.
 
                                       9
<PAGE>
    THE RETAIL PROPANE BUSINESS IS HIGHLY COMPETITIVE
 
    The Partnership's profitability is affected by the competition for customers
among all participants in the retail propane business. The Partnership competes
with other distributors of propane, including a number of large national and
regional firms and several thousand small independent firms. Some of these
competitors are larger or have greater financial resources than the Partnership.
Should a competitor attempt to increase market share by reducing prices, the
Partnership's financial condition and results of operations could be materially
adversely affected. Generally, warmer-than-normal weather further intensifies
competition. The Partnership believes that its ability to compete effectively
depends on the reliability of its service, its responsiveness to customers and
its ability to maintain competitive retail prices.
 
    THE RETAIL PROPANE BUSINESS FACES COMPETITION FROM ALTERNATIVE ENERGY
     SOURCES
 
    Propane competes with other sources of energy, some of which are less costly
for equivalent energy value. The Partnership competes for customers against
suppliers of electricity, natural gas and fuel oil. Electricity is a major
competitor of propane, but propane generally enjoys a competitive price
advantage over electricity. Except for certain industrial and commercial
applications, propane is generally not competitive with natural gas in areas
where natural gas pipelines already exist because natural gas is a significantly
less expensive source of energy than propane. The gradual expansion of the
nation's natural gas distribution systems has resulted in the availability of
natural gas in many areas that previously depended upon propane. Although
propane is similar to fuel oil in certain applications and market demand,
propane and fuel oil compete to a lesser extent primarily because of the cost of
converting from one to the other. The Partnership cannot predict the effect that
the development of alternative energy sources might have on its operations.
 
    THE PARTNERSHIP MAY NOT BE SUCCESSFUL IN GROWING THROUGH ACQUISITIONS
 
    The retail propane industry is mature, and the Partnership foresees only
limited growth in total retail demand for propane. Moreover, as a result of
long-standing customer relationships that are typical in the retail home propane
industry, the inconvenience of switching tanks and suppliers and propane's
higher cost as compared to certain other energy sources, such as natural gas,
the Partnership may experience difficulty in acquiring new retail customers,
other than through acquisitions. Therefore, while the Partnership's business
strategy includes internal growth and start-ups of new customer service
locations, the ability of the Partnership's propane business to grow will depend
principally upon its ability to acquire other retail propane distributors. In
calendar 1997, the Partnership added approximately 28,000 customers and annual
retail propane sales of approximately 24 million gallons through acquisitions.
However, there can be no assurance that the Partnership will continue to
identify attractive acquisition candidates in the future, that the Partnership
will be able to acquire such businesses on economically acceptable terms, that
any acquisitions will not be dilutive to earnings and distributions to the
Unitholders or that any additional debt incurred to finance acquisitions will
not affect the ability of the Partnership to make distributions to the
Unitholders. The Partnership is not required under the Partnership Agreement to
seek Unitholder approval of any acquisition. The Partnership is subject to
certain covenants in agreements governing its indebtedness that restrict the
Partnership's ability to incur indebtedness to finance acquisitions. In
addition, to the extent that warm weather adversely affects the Partnership's
operating and financial results, the Partnership's access to capital and its
acquisition activities may be limited.
 
    THE PARTNERSHIP IS SUBJECT TO OPERATING AND LITIGATION RISKS WHICH MAY NOT
     BE COVERED BY INSURANCE
 
    The Partnership's operations are subject to all operating hazards and risks
normally incidental to handling, storing and delivering combustible liquids such
as propane. As a result, the Partnership is a defendant in various legal
proceedings and litigation arising in the ordinary course of business. The
Partnership maintains insurance policies with insurers in such amounts and with
such coverages and deductibles as it believes are reasonable and prudent.
However, there can be no assurance that such
 
                                       10
<PAGE>
insurance will be adequate to protect the Partnership from all material expenses
related to potential future claims for personal injury and property damage or
that such levels of insurance will be available in the future at economical
prices.
 
    THE PARTNERSHIP IS DEPENDENT UPON KEY PERSONNEL
 
    The Partnership believes that its success depends to a significant extent
upon the efforts and abilities of its senior management team. The failure by the
Managing General Partner to retain members of its senior management team could
adversely affect the financial condition or results of operations of the
Partnership. Each of Messrs. Baxter, Kittrell, Goedde and DiCosimo is employed
by the Managing General Partner pursuant to a three-year employment contract.
However, each of the executives will be entitled to terminate his agreement and
receive a severance amount equal to the total compensation due for the remainder
of the employment term upon a "change of control" of NOR, which is defined to
include any person or group becoming the beneficial owner of 10% of the voting
securities of NOR, and upon certain other circumstances.
 
    ENERGY EFFICIENCY AND TECHNOLOGY ADVANCES MAY AFFECT DEMAND
 
    The national trend toward increased conservation and technological advances,
including installation of improved insulation and the development of more
efficient furnaces and other heating devices, has adversely affected the demand
for propane by retail customers. The Partnership cannot predict the materiality
of the effect of future conservation measures or the effect that any
technological advances in heating, conservation, energy generation or other
devices might have on its operations.
 
RISKS INHERENT IN AN INVESTMENT IN THE PARTNERSHIP
 
    CASH DISTRIBUTIONS ARE NOT GUARANTEED AND MAY FLUCTUATE WITH PARTNERSHIP
     PERFORMANCE
 
    Although the Partnership will distribute all of its Available Cash, there
can be no assurance regarding the amounts of Available Cash to be generated by
the Partnership. The actual amounts of Available Cash will depend upon numerous
factors, including cash flow generated by operations, required principal and
interest payments on the Partnership's debt, the costs of acquisitions
(including related debt service payments), restrictions contained in the
Partnership's debt instruments, issuances of debt and equity securities by the
Partnership, fluctuations in working capital, capital expenditures, adjustments
in reserves, prevailing economic conditions and financial, business and other
factors, a number of which are beyond the control of the Partnership and the
Managing General Partner. Because the Partnership is effectively a holding
company for the Operating Partnership, distributions by the Partnership are
dependent upon distributions of cash from the Operating Partnership to the
Partnership. Cash distributions are dependent primarily on cash flow, including
from reserves and working capital borrowings, and not on profitability, which is
affected by non-cash items. Therefore, cash distributions might be made during
periods when the Partnership records losses and might not be made during periods
when the Partnership records profits.
 
    The amount of Available Cash from Operating Surplus needed to distribute the
Minimum Quarterly Distribution for four quarters on the Common Units and
Subordinated Units outstanding as of the date of this Prospectus and on the
General Partners' aggregate 2% general partner interest is approximately $43.7
million ($28.6 million for the Common Units, $14.2 million for the Subordinated
Units and $874,000 for the aggregate 2% general partner interest). The amount of
pro forma Available Cash from Operating Surplus generated during fiscal 1997 was
approximately $22.3 million (including approximately $2.9 million of Available
Cash from Operating Surplus of businesses acquired in May and June, 1997 but not
reflecting Available Cash from Operating Surplus of businesses acquired
subsequent to June 30, 1997). Such amount would have been insufficient by
approximately $6.9 million to cover the Minimum Quarterly Distribution for such
fiscal year on all of the Common Units currently outstanding and the related
distribution on the general partner interests, and would have been insufficient
by approximately $21.4 million to cover the
 
                                       11
<PAGE>
Minimum Quarterly Distribution on all Subordinated Units and the related
distribution on the general partner interests. The Partnership elected not to
pay the Minimum Quarterly Distribution with respect to the Subordinated Units
for the quarters ended December 31, 1997 and March 31 and June 30, 1998. For the
calculation of pro forma Available Cash from Operating Surplus, see "Cash
Available for Distribution."
 
    The Partnership Agreement gives the Managing General Partner broad
discretion in establishing reserves for the proper conduct of the Partnership's
business that will affect the amount of Available Cash. Because the business of
the Partnership is seasonal, the Managing General Partner will make additions to
reserves during certain quarters in order to fund operating expenses, interest
payments and cash distributions to partners with respect to other quarters. In
addition, the Partnership is required to establish reserves in respect of future
payments of principal and interest on the Notes and, in certain instances, in
respect of future payments of principal and interest under a $125.0 million bank
credit facility (the "Bank Credit Facility"). See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Liquidity and Capital
Resources--Financing and Sources of Liquidity." The Partnership anticipates that
reserves for interest on the Notes will be established at approximately $4.1
million at each March and September, and the reserves will be eliminated when
interest payments are made on the Notes in June and December. The $4.1 million
reserved for interest is approximately 9.4% of the amount of Available Cash
needed to distribute the Minimum Quarterly Distribution for four quarters on the
Common Units and the Subordinated Units outstanding as of the date of this
Prospectus and on the General Partners' general partner interests. Reserves for
repayment of principal on the Notes are not required until March 2003 and then
will equal 25%, 50% and 75% at each March, June and September, respectively, of
the next installment of principal, and the reserves will be eliminated when
principal payments are made on the Notes in December. The $20.6 million reserved
for principal payments is approximately 47.5% of the amount of Available Cash
needed to distribute the Minimum Quarterly Distribution for four quarters on the
Common Units and the Subordinated Units outstanding as of the date of this
Prospectus and on the General Partners' general partner interests. Furthermore,
the Notes and the Bank Credit Facility limit the Operating Partnership's ability
to distribute cash to the Partnership. Distributions from the Operating
Partnership will be the Partnership's primary source of Available Cash. Any
subsequent refinancing of the Notes, the Bank Credit Facility or any other
indebtedness incurred by the Partnership may have similar restrictions, and the
Partnership's ability to distribute cash may also be limited during the
existence of defaults under any of the Partnership's debt instruments. As a
result of these and other factors, there can be no assurance regarding the
actual levels of cash distributions to Unitholders by the Partnership.
 
    THE PARTNERSHIP'S INDEBTEDNESS MAY LIMIT THE PARTNERSHIP'S ABILITY TO MAKE
     DISTRIBUTIONS AND MAY AFFECT ITS OPERATIONS
 
    At March 31, 1998, the Partnership's total indebtedness was approximately
$237.1 million, constituting approximately 44.6% of its total capitalization. As
a result, the Partnership is significantly leveraged and has indebtedness that
is substantial in relation to its partners' capital. As of March 31, 1998, the
Partnership had approximately $120.5 million of unused borrowing capacity under
the Bank Credit Facility. Future borrowings could result in a significant
increase in the Partnership's leverage. The ability of the Partnership to make
principal and interest payments depends on future performance, which performance
is subject to many factors, a number of which will be outside the Partnership's
control. The Notes and the Bank Credit Facility contain provisions relating to
change of control. If such change of control provisions are triggered, such
outstanding indebtedness may become due. In such event, there is no assurance
that the Partnership would be able to pay the indebtedness. There is no
restriction on the ability of the Managing General Partner or Northwestern
Growth to enter into a transaction which would trigger such change of control
provisions. The Notes and the Bank Credit Facility contain restrictive covenants
that limit the ability of the Operating Partnership to distribute cash and to
incur additional indebtedness. The payment of principal and interest on such
indebtedness and the reserves required by the terms of the Partnership's
 
                                       12
<PAGE>
indebtedness for the future payment thereof will reduce the cash available to
make distributions on the Units. The Partnership's leverage may adversely affect
the ability of the Partnership to finance its future operations and capital
needs, limit its ability to pursue acquisitions and other business opportunities
and make its results of operations more susceptible to adverse economic or
operating conditions. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations--Liquidity and Capital Resources--Financing
and Sources of Liquidity."
 
    COST REIMBURSEMENTS AND FEES DUE TO THE MANAGING GENERAL PARTNER MAY BE
     SUBSTANTIAL
 
    Prior to making any distribution on the Common Units, the Partnership will
reimburse the Managing General Partner and its affiliates at cost for all
expenses incurred on behalf of the Partnership. On a pro forma basis,
approximately $48.9 million of expenses (primarily wages and salaries) would
have been reimbursed by the Partnership to the Managing General Partner in
fiscal 1997 (including $30.7 million actually reimbursed for the six and
one-half month period ended June 30, 1997). In addition, the Managing General
Partner and its affiliates may provide services to the Partnership for which the
Partnership will be charged reasonable fees as determined by the Managing
General Partner. The reimbursement of such expenses and the payment of any such
fees could adversely affect the ability of the Partnership to make
distributions.
 
    UNITHOLDERS HAVE CERTAIN LIMITS ON THEIR VOTING RIGHTS; THE MANAGING GENERAL
     PARTNER MANAGES AND OPERATES THE PARTNERSHIP
 
    The Managing General Partner manages and operates the Partnership. Unlike
the holders of common stock in a corporation, holders of Common Units have only
limited voting rights on matters affecting the Partnership's business. Holders
of Common Units have no right to elect the Managing General Partner on an annual
or other continuing basis, and the Managing General Partner may not be removed
except pursuant to the vote of the holders of at least 66 2/3% of the
outstanding Units (including Units owned by the General Partners and their
affiliates) and upon the election of a successor general partner by the vote of
the holders of not less than a majority of the Outstanding Units. The ownership
of the Subordinated Units by the Managing General Partner and its affiliates
effectively gives the Managing General Partner the ability to prevent its
removal. As a result, holders of Common Units have limited influence on matters
affecting the operation of the Partnership, and third parties may find it
difficult to attempt to gain control, or influence the activities, of the
Partnership. See "The Partnership Agreement."
 
    THE PARTNERSHIP MAY ISSUE ADDITIONAL COMMON UNITS THEREBY DILUTING EXISTING
     UNITHOLDERS' INTERESTS
 
    The Partnership has the authority under the Partnership Agreement to issue
an unlimited number of additional Common Units or other equity securities for
such consideration and on such terms and conditions as are established by the
Managing General Partner, in its sole discretion without the approval of the
Unitholders. During the Subordination Period, however, the Partnership may not
issue equity securities ranking prior or senior to the Common Units or an
aggregate of more than 4,270,000 additional Common Units (excluding Common Units
issued upon conversion of Subordinated Units, pursuant to employee benefit plans
(such as the Restricted Unit Plan) or in connection with certain acquisitions or
capital improvements or the repayment of certain indebtedness) or an equivalent
number of securities ranking on a parity with the Common Units without the
approval of holders of a Unit Majority. Under the Restricted Unit Plan, the
executive officers and directors of the Managing General Partner are eligible to
receive rights which, subject to vesting, entitle them to receive Common Units.
The issuance of Common Units pursuant to the Restricted Unit Plan may dilute the
interests of holders of Common Units in distributions by the Partnership. As of
March 31, 1998, the Partnership had granted rights relating to 488,060 Common
Units under the Restricted Unit Plan.
 
    After the end of the Subordination Period, the Partnership may issue an
unlimited number of limited partner interests of any type without the approval
of the Unitholders. The Partnership Agreement does not
 
                                       13
<PAGE>
give the holders of Common Units the right to approve the issuance by the
Partnership of equity securities ranking junior to the Common Units at any time.
Based on the circumstances of each case, the issuance of additional Common Units
or securities ranking on a parity with the Common Units may dilute the value of
the interests of the then-existing holders of Common Units in the net assets of
the Partnership, dilute the interests of holders of Common Units in
distributions by the Partnership or make it more difficult for a person or group
to remove the Managing General Partner or otherwise change the management of the
Partnership.
 
    If some or all of the Subordinated Units are converted into Common Units,
the amount of Available Cash necessary to pay the Minimum Quarterly Distribution
with respect to all of the Common Units would be increased proportionately,
thereby resulting in a dilution of the interests of existing Common Unitholders
in distributions by the Partnership.
 
    CHANGE OF MANAGEMENT PROVISIONS
 
    The ownership of Subordinated Units by the Managing General Partner and its
affiliates effectively precludes the removal of the Managing General Partner
without its consent. In addition, the Partnership Agreement contains certain
provisions that may have the effect of discouraging a person or group from
attempting to remove the Managing General Partner of the Partnership or
otherwise change the management of the Partnership. If the Managing General
Partner is removed as general partner of the Partnership under circumstances
where "Cause" does not exist and Units held by the Managing General Partner and
its affiliates are not voted in favor of such removal, (i) the Subordination
Period will end and all outstanding Subordinated Units will immediately convert
into Common Units on a one-for-one basis, (ii) any existing Common Unit
Arrearages will be extinguished and (iii) the General Partners will have the
right to convert their general partner interests (and their rights to receive
Incentive Distributions) into Common Units or to receive cash in exchange for
such interests. "Cause" is defined as a court of competent jurisdiction having
entered a final, non-appealable judgment finding the Managing General Partner
liable for actual fraud, gross negligence or willful wanton misconduct in its
capacity as a general partner of the Partnership. Further, if any person or
group (other than the Managing General Partner or its affiliates) acquires
beneficial ownership of 20% or more of any class of Units then outstanding, such
person or group will lose voting rights with respect to all of its Units. In
addition, the Partnership has substantial latitude in issuing equity securities
without Unitholder approval. The Partnership Agreement also contains provisions
limiting the ability of Unitholders to call meetings of Unitholders or to
acquire information about the Partnership's operations as well as other
provisions limiting the Unitholders' ability to influence the manner or
direction of management. The effect of these provisions may be to diminish the
price at which the Common Units trade under certain circumstances. See "The
Partnership Agreement-- Withdrawal or Removal of the General Partners."
 
    THE MANAGING GENERAL PARTNER WILL HAVE A LIMITED CALL RIGHT WITH RESPECT TO
     THE LIMITED PARTNER INTERESTS
 
    If at any time less than 20% of the then-issued and outstanding limited
partner interests of any class (including Common Units) are held by persons
other than the Managing General Partner and its affiliates, the Managing General
Partner will have the right, which it may assign to any of its affiliates or the
Partnership, to acquire all, but not less than all, of the remaining limited
partner interests of such class held by such unaffiliated persons at a price
generally equal to the then-current market price of limited partner interests of
such class. As a consequence, a holder of Common Units may be required to sell
his Common Units at a time when he may not desire to sell them or at a price
that is less than the price he would desire to receive upon such sale. See "The
Partnership Agreement--Limited Call Right."
 
                                       14
<PAGE>
    UNITHOLDERS MAY NOT HAVE LIMITED LIABILITY IN CERTAIN CIRCUMSTANCES;
     LIABILITY FOR RETURN OF CERTAIN DISTRIBUTIONS
 
    The limitations on the liability of holders of limited partner interests for
the obligations of a limited partnership have not been clearly established in
some states. If it were determined that the Partnership had been conducting
business in any state without compliance with the applicable limited partnership
statute, or that the right or the exercise of the right by the Unitholders as a
group to remove or replace the General Partners, to make certain amendments to
the Partnership Agreement or to take other action pursuant to the Partnership
Agreement constituted participation in the "control" of the Partnership's
business, then the Unitholders could be held liable in certain circumstances for
the Partnership's obligations to the same extent as a general partner. In
addition, under certain circumstances a Unitholder may be liable to the
Partnership for the amount of a distribution for a period of three years from
the date of the distribution. See "The Partnership Agreement--Limited Liability"
for a discussion of the limitations on liability and the implications thereof to
a Unitholder.
 
    HOLDERS OF COMMON UNITS HAVE NOT BEEN REPRESENTED BY COUNSEL
 
    The holders of the Common Units were not represented by counsel in
connection with the preparation of the Partnership Agreement or the other
agreements referred to herein.
 
CONFLICTS OF INTEREST AND FIDUCIARY RESPONSIBILITIES
 
    Conflicts of interest could arise as a result of the relationships between
the Partnership, on the one hand, and the General Partners and their affiliates,
on the other. The directors and officers of the Managing General Partner have
fiduciary duties to manage the Managing General Partner in a manner beneficial
to its stockholder. At the same time, the Managing General Partner has fiduciary
duties to manage the Partnership in a manner beneficial to the Partnership and
the Unitholders. The duties of the Managing General Partner, as managing general
partner, to the Partnership and the Unitholders, therefore, may come into
conflict with the duties of management of the Managing General Partner to its
stockholder.
 
    Conflicts of interest might arise with respect to the following matters,
among others:
 
    (i) Decisions of the Managing General Partner with respect to the amount and
timing of cash expenditures, borrowings, issuances of additional Units and
reserves in any quarter will affect whether, or the extent to which, there is
sufficient Available Cash from Operating Surplus to meet the Minimum Quarterly
Distribution and Target Distribution Levels on all Units in a given quarter. In
addition, actions by the Managing General Partner may have the effect of
enabling the General Partners to receive distributions on the Subordinated Units
or Incentive Distributions or hastening the expiration of the Subordination
Period or the conversion of Subordinated Units into Common Units.
 
    (ii) The Partnership relies for its management on employees of the Managing
General Partner and its affiliates.
 
   (iii) The terms of the Partnership's New Acquisition Incentive Plan could
give the senior executives of the Managing General Partner an incentive to cause
the Partnership to acquire additional propane operations without regard to
whether the operations would prove beneficial to the Partnership and may present
the senior executives of the Managing General Partner with a conflict of
interest in negotiating the acquisition price on behalf of the Partnership.
 
    (iv) Whenever possible, the Managing General Partner intends to limit the
Partnership's liability under contractual arrangements to all or particular
assets of the Partnership, with the other party thereto to have no recourse
against the General Partners or their assets.
 
                                       15
<PAGE>
    (v) Any agreements between the Partnership and the Managing General Partner
and its affiliates will not grant to the holders of Common Units, separate and
apart from the Partnership, the right to enforce the obligations of the Managing
General Partner and such affiliates in favor of the Partnership. Therefore, the
Managing General Partner, in its capacity as the managing general partner of the
Partnership, will be primarily responsible for enforcing such obligations.
 
    (vi) Under the terms of the Partnership Agreement, the Managing General
Partner is not restricted from causing the Partnership to pay the Managing
General Partner or its affiliates for any services rendered on terms that are
fair and reasonable to the Partnership or entering into additional contractual
arrangements with any of such entities on behalf of the Partnership. Neither the
Partnership Agreement nor any of the other agreements, contracts and
arrangements between the Partnership, on the one hand, and the Managing General
Partner and its affiliates, on the other, are or will be the result of
arm's-length negotiations.
 
   (vii) The Managing General Partner may exercise its right to call for and
purchase Units as provided in the Partnership Agreement or assign such right to
one of its affiliates or to the Partnership.
 
  (viii) The Partnership Agreement provides that the Managing General Partner is
generally restricted from engaging in any business activities other than those
incidental to its ownership of interests in the Partnership. Notwithstanding the
foregoing, the Partnership Agreement permits affiliates of the Managing General
Partner (including NOR, Northwestern Growth and the Special General Partner) to
compete with the Partnership in the retail sale of propane in the continental
United States only if (A) the Managing General Partner determines, in its
reasonable judgment prior to the commencement of such activity, that it is not
in the best interests of the Partnership to engage in such activity either (1)
because of the financial commitments or operating characteristics associated
with such activity, or (2) because such activity is not consistent with the
Partnership's business strategy or cannot otherwise be integrated with the
Partnership's operations on a basis beneficial to the Partnership; or (B) such
activity is being undertaken as provided in a joint venture agreement or other
agreement between the Partnership and an affiliate of the Managing General
Partner and such joint venture or other agreement was determined at the time it
was entered into to be fair to the Partnership in the reasonable judgment of the
Managing General Partner. See "Conflicts of Interest and Fiduciary
Responsibilities--Conflicts of Interest--The General Partners' Affiliates May
Compete with the Partnership." In addition, affiliates of the Managing General
Partner (including the Special General Partner) may compete with the Partnership
in businesses other than the retail sale of propane in the continental United
States. There can be no assurance that there will not be competition between the
Partnership and affiliates of the Managing General Partner in the future.
 
    (ix) The Partnership Agreement does not prohibit the Partnership from
engaging in roll-up transactions. Were the Managing General Partner to cause the
Partnership to engage in a roll-up transaction, there could be no assurance that
such a transaction would not have a material adverse effect on a Unitholder's
investment in the Partnership.
 
    Unless provided for otherwise in the partnership agreement, Delaware law
generally requires a general partner of a Delaware limited partnership to adhere
to fiduciary duty standards under which it owes its limited partners the highest
duties of good faith, fairness and loyalty and which generally prohibit such
general partner from taking any action or engaging in any transaction as to
which it has a conflict of interest. The Partnership Agreement expressly permits
the Managing General Partner to resolve conflicts of interest between itself or
its affiliates, on the one hand, and the Partnership or the Unitholders, on the
other, and to consider, in resolving such conflicts of interest, the interests
of other parties in addition to the interests of the Unitholders. In addition,
the Partnership Agreement provides that a purchaser of Common Units is deemed to
have consented to certain conflicts of interest and actions of the Managing
General Partner and its affiliates that might otherwise be prohibited, including
those described in clauses (i)-(ix) above, and to have agreed that such
conflicts of interest and actions do not constitute a breach by the Managing
General Partner of any duty stated or implied by law or equity. The Managing
General
 
                                       16
<PAGE>
Partner will not be in breach of its obligations under the Partnership Agreement
or its duties to the Partnership or the Unitholders if the resolution of such
conflict is fair and reasonable to the Partnership. The latitude given in the
Partnership Agreement to the Managing General Partner in resolving conflicts of
interest may significantly limit the ability of a Unitholder to challenge what
might otherwise be a breach of fiduciary duty.
 
    The Partnership Agreement expressly limits the liability of the General
Partners by providing that the General Partners, their affiliates and their
officers and directors will not be liable for monetary damages to the
Partnership, the limited partners or assignees for errors of judgment or for any
acts or omissions if the General Partners and such other persons acted in good
faith. In addition, the Partnership is required to indemnify the General
Partners, their affiliates and their respective officers, directors, employees,
agents and trustees to the fullest extent permitted by law against liabilities,
costs and expenses incurred by the General Partners or such other persons, if
the General Partners or such persons acted in good faith and in a manner they
reasonably believed to be in, or (in the case of a person other than a General
Partner) not opposed to, the best interests of the Partnership and, with respect
to any criminal proceedings, had no reasonable cause to believe the conduct was
unlawful.
 
    The provisions of Delaware law that allow the common law fiduciary duties of
a general partner to be modified by a partnership agreement have not been tested
in a court of law, and the Managing General Partner has not obtained an opinion
of counsel covering the provisions set forth in the Partnership Agreement that
purport to waive or restrict the fiduciary duties of the General Partners that
would be in effect under common law were it not for the Partnership Agreement.
See "Conflicts of Interest and Fiduciary Responsibilities--Conflicts of
Interest."
 
TAX RISKS
 
    For a general discussion of the expected federal income tax consequences of
owning and disposing of Common Units, see "Tax Considerations."
 
    TAX TREATMENT IS DEPENDENT ON PARTNERSHIP STATUS
 
    The availability to a Common Unitholder of the federal income tax benefits
of an investment in the Partnership depends, in large part, on the
classification of the Partnership as a partnership for federal income tax
purposes. Assuming the accuracy of certain factual matters as to which the
General Partners and the Partnership have made representations, Counsel is of
the opinion that, under current law, the Partnership will be classified as a
partnership for federal income tax purposes. No ruling from the IRS as to
classification has been or is expected to be requested. Instead, the Partnership
intends to rely on such opinion of Counsel (which is not binding on the IRS).
One of the representations of the Partnership on which the opinion of Counsel is
based is that at least 90% of the Partnership's gross income for each taxable
year in the future will be "qualifying income." Whether the Partnership will
continue to be classified as a partnership in part depends, therefore, on the
Partnership's ability to meet this qualifying income test in the future. See
"Tax Considerations--Partnership Status."
 
    If the Partnership were classified as an association taxable as a
corporation for federal income tax purposes, the Partnership would pay tax on
its income at corporate rates (currently a 35% federal rate), distributions
would generally be taxed again to the Unitholders as corporate distributions,
and no income, gains, losses or deductions would flow through to the
Unitholders. Because a tax would be imposed upon the Partnership as an entity,
the cash available for distribution to the holders of Common Units would be
substantially reduced. Treatment of the Partnership as an association taxable as
a corporation or otherwise as a taxable entity would result in a material
reduction in the anticipated cash flow and after-tax return to the holders of
Common Units and thus would likely result in a substantial reduction in the
value of the Common Units. See "Tax Considerations--Partnership Status."
 
                                       17
<PAGE>
    There can be no assurance that the law will not be changed so as to cause
the Partnership to be treated as an association taxable as a corporation for
federal income tax purposes or otherwise to be subject to entity-level taxation.
The Partnership Agreement provides that, if a law is enacted or existing law is
modified or interpreted in a manner that subjects the Partnership to taxation as
a corporation or otherwise subjects the Partnership to entity-level taxation for
federal, state or local income tax purposes, certain provisions of the
Partnership Agreement will be subject to change, including a decrease in the
Minimum Quarterly Distribution and the Target Distribution Levels to reflect the
impact of such law on the Partnership. See "Cash Distribution Policy--Adjustment
of Minimum Quarterly Distribution and Target Distribution Levels."
 
    NO IRS RULING WITH RESPECT TO TAX CONSEQUENCES
 
    No ruling has been requested from the IRS with respect to classification of
the Partnership as a partnership for federal income tax purposes, whether the
Partnership's propane operations generate "qualifying income" under Section 7704
of the Code or any other matter affecting the Partnership. Accordingly, the IRS
may adopt positions that differ from Counsel's conclusions expressed herein. It
may be necessary to resort to administrative or court proceedings in an effort
to sustain some or all of Counsel's conclusions, and some or all of such
conclusions ultimately may not be sustained. Any such contest with the IRS may
materially and adversely impact the market for the Common Units and the prices
at which Common Units trade. In addition, the costs of any contest with the IRS
will be borne directly or indirectly by some or all of the Unitholders and the
General Partners.
 
    CONSEQUENCES OF EXCHANGING PROPERTY FOR COMMON UNITS
 
    In general, no gain or loss will be recognized for federal income tax
purposes by the Partnership or by a person (including any individual,
partnership, corporation or corporation taxed under Subchapter S of the Code)
contributing property (including stock) to the Partnership in exchange for
Common Units. If the Partnership assumes liabilities in connection with a
contribution of assets in exchange for Common Units, however, taxable gain may
be recognized by the contributing person in certain circumstances.
 
    TAX LIABILITY EXCEEDING CASH DISTRIBUTIONS
 
    A Unitholder will be required to pay federal income taxes and, in certain
cases, state and local income taxes on his allocable share of the Partnership's
income, whether or not he receives cash distributions from the Partnership.
There is no assurance that a Unitholder will receive cash distributions equal to
his allocable share of taxable income from the Partnership or even the tax
liability to him resulting from that income. Further, a holder of Common Units
may incur a tax liability, in excess of the amount of cash received, upon the
sale of his Common Units. See "Tax Considerations--Tax Consequences of Unit
Ownership" and "--Disposition of Common Units."
 
    OWNERSHIP OF COMMON UNITS BY TAX-EXEMPT ORGANIZATIONS AND CERTAIN OTHER
     INVESTORS
 
    Investment in Common Units by certain tax-exempt entities, regulated
investment companies and foreign persons raises issues unique to such persons.
For example, virtually all of the taxable income derived by most organizations
exempt from federal income tax (including IRAs and other retirement plans) from
the ownership of Common Units will be unrelated business taxable income and thus
will be taxable to such a Unitholder. See "Tax Considerations--Uniformity of
Units--Tax-Exempt Organizations and Certain Other Investors."
 
                                       18
<PAGE>
    DEDUCTIBILITY OF LOSSES
 
    In the case of taxpayers subject to the passive loss rules (generally,
individuals and closely held corporations), losses generated by the Partnership
will only be available to offset future income generated by the Partnership and
cannot be used to offset income from other activities, including passive
activities or investments. Passive losses which are not deductible because they
exceed the Unitholder's income generated by the Partnership may be deducted in
full when the Unitholder disposes of his entire investment in the Partnership in
a fully taxable transaction to an unrelated party. Net passive income from the
Partnership may be offset by unused Partnership losses carried over from prior
years, but not by losses from other passive activities, including losses from
other publicly traded partnerships. See "Tax Considerations--Tax Consequences of
Unit Ownership--Limitations on Deductibility of Partnership Losses."
 
    TAX SHELTER REGISTRATION; POTENTIAL IRS AUDIT
 
    The Partnership has registered with the Secretary of the Treasury as a "tax
shelter." No assurance can be given that the Partnership will not be audited by
the IRS or that tax adjustments will not be made. The rights of a Unitholder
owning less than a 1% profits interest in the Partnership to participate in the
income tax audit process are very limited. Further, any adjustments in the
Partnership's tax returns will lead to adjustments in the Unitholders' tax
returns and may lead to audits of Unitholders' tax returns and adjustments of
items unrelated to the Partnership. Each Unitholder would bear the cost of any
expenses incurred in connection with an examination of such Unitholder's
personal tax return.
 
    UNIFORMITY OF COMMON UNITS AND NONCONFORMING DEPRECIATION CONVENTIONS
 
    Because the Partnership cannot match transferors and transferees of Common
Units, uniformity of the economic and tax characteristics of the Common Units to
a purchaser of Common Units must be maintained. To maintain uniformity and for
other reasons, the Partnership will adopt certain depreciation and amortization
conventions that do not conform with all aspects of certain proposed and final
Treasury Regulations. A successful challenge to those conventions by the IRS
could adversely affect the amount of tax benefits available to a purchaser of
Common Units and could have a negative impact on the value of the Common Units.
See "Tax Considerations--Uniformity of Units."
 
    STATE, LOCAL AND OTHER TAX CONSIDERATIONS
 
    In addition to federal income taxes, Unitholders will likely be subject to
other taxes, such as state and local taxes, unincorporated business taxes and
estate, inheritance or intangible taxes that are imposed by the various
jurisdictions in which the Partnership does business or owns property. A
Unitholder will likely be required to file state and local income tax returns
and pay state and local income taxes in some or all of the various jurisdictions
in which the Partnership does business or owns property and may be subject to
penalties for failure to comply with those requirements. The Partnership
currently owns property and conducts business in the following states which
currently impose a personal income tax: Alabama, Arizona, Arkansas, California,
Georgia, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, New
Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma,
South Carolina, Tennessee, Utah, Vermont and Virginia. It is the responsibility
of each Unitholder to file all United States federal, state and local tax
returns that may be required of such Unitholder. Counsel has not rendered an
opinion on the state or local tax consequences of an investment in the
Partnership. See "Tax Considerations-- State, Local and Other Tax
Considerations."
 
    DISPOSITION OF COMMON UNITS
 
    A Unitholder who sells Common Units will recognize gain or loss equal to the
difference between the amount realized (including his share of Partnership
nonrecourse liabilities) and his adjusted tax basis in such Common Units. Thus,
prior Partnership distributions in excess of cumulative net taxable income in
 
                                       19
<PAGE>
respect of a Common Unit which decreased a Unitholder's tax basis in such Common
Unit will, in effect, become taxable income if the Common Unit is sold at a
price greater than the Unitholder's tax basis in such Common Units, even if the
price is less than his original cost. A portion of the amount realized (whether
or not representing gain) may be ordinary income. Furthermore, should the IRS
successfully contest certain conventions to be used by the Partnership, a
Unitholder could realize more gain on the sale of Units than would be the case
under such conventions without the benefit of decreased income in prior years.
 
    PARTNERSHIP TAX INFORMATION AND AUDITS
 
    The Partnership will furnish each holder of Common Units with a Schedule K-1
that sets forth his allocable share of income, gains, losses and deductions. In
preparing these schedules, the Partnership will use various accounting and
reporting conventions and adopt various depreciation and amortization methods.
There is no assurance that these schedules will yield a result that conforms to
statutory or regulatory requirements or to administrative pronouncements of the
IRS. Further, the Partnership's tax return may be audited, and any such audit
could result in an audit of a partner's individual tax return as well as
increased liabilities for taxes because of adjustments resulting from the audit.
 
                                USE OF PROCEEDS
 
    Unless otherwise specified in the applicable Prospectus Supplement, the net
proceeds from the sale of the Common Units offered hereby will be used for
general business purposes, which may include working capital, expansion of the
Partnership's propane business by internal growth and through acquisition, and
repayment of indebtedness. Pending application for the foregoing purposes, the
net proceeds will be invested in short-term securities.
 
                                       20
<PAGE>
                     SELECTED FINANCIAL AND OPERATING DATA
 
    The pro forma information for the fiscal year ended June 30, 1997 set forth
below has been prepared by combining the historical results of operations of
Synergy for the five and one-half months ended December 16, 1996; Empire Energy
for the five and one-half months ended December 16, 1996; Coast for the four and
one-half months ended December 16, 1996; and the Partnership for the six and
one-half months ended June 30, 1997. The pro forma information for the nine
months ended March 31, 1997 set forth below has been prepared by combining the
historical results of operations of Synergy for the five and one-half months
ended December 16, 1996; Empire Energy for the five and one-half months ended
December 16, 1996; Coast for the four and one-half months ended December 16,
1996 and the Partnership for the period from December 17, 1996 to March 31,
1997. The information for the nine months ended March 31, 1998 is derived from
the Partnership's unaudited consolidated financial statements incorporated by
reference in this Prospectus and, in the opinion of management, includes all
adjustments necessary for a fair presentation of such information. The
Partnership believes that it is reasonable to combine the results of operations
of companies having different fiscal years because each of the fiscal years
being combined includes the same winter heating seasons in which the majority of
the Partnership's revenue and cash flow was generated. The financial and
operating data for the nine month periods ended March 31, 1998 and 1997 are not
necessarily indicative of the results of operations for the full fiscal years.
The following information should not be deemed indicative of future operating
results of the Partnership.
 
                                       21
<PAGE>
 
<TABLE>
<CAPTION>
                                                               Predecessors
                                             ------------------------------------------------
                                                                                Acquisition/
                               Partnership               Empire                  Disposition
                                (December     Synergy    Energy       Coast      Adjustments                Partnership
                                   17,       (July 1,   (July 1,     (Aug 1,    (July 1, 1996                Pro Forma
                                 1996 to      1996 to    1996 to      1996           to                     Year Ended
                                 June 30,    Dec. 16,   Dec. 16,   to Dec. 16,  December 16,    Pro Forma    June 30,
                                  1997)        1996)      1996)       1996)       1996)(a)     Adjustments     1997
                               ------------  ---------  ---------  -----------  -------------  -----------  -----------
<S>                            <C>           <C>        <C>        <C>          <C>            <C>          <C>
                                                            (in thousands)
STATEMENT OF OPERATIONS DATA:
  Revenues...................   $  389,630   $  44,066  $  43,201   $ 185,460     $   1,840     $            $ 664,197
  Cost of sales..............      315,324      23,322     23,310     173,155         1,339        (1,558)(b)    534,892
                               ------------  ---------  ---------  -----------       ------    -----------  -----------
  Gross profit...............       74,306      20,744     19,891      12,305           501         1,558      129,305
  Operating, general and
    administrative
    expenses.................       50,023      15,071     13,394      10,579           360        (1,163)(c)     88,264
  Depreciation and
    amortization.............        8,519       1,904      2,930       1,604            71            45(d)     15,073
                               ------------  ---------  ---------  -----------       ------    -----------  -----------
  Operating income...........       15,764       3,769      3,567         122            70         2,676       25,968
  Interest expense...........        9,944       3,311      3,621       2,238            86          (985)(e)     18,215
                               ------------  ---------  ---------  -----------       ------    -----------  -----------
  Net income (loss) before
    income taxes.............        5,820         458        (54)     (2,116)          (16)        3,661        7,753
  Income taxes (benefit).....           64         298         32        (748)            7           456(f)        109
                               ------------  ---------  ---------  -----------       ------    -----------  -----------
  Net income (loss)..........   $    5,756   $     160  $     (86)  $  (1,368)    $     (23)    $   3,205    $   7,644
                               ------------  ---------  ---------  -----------       ------    -----------  -----------
                               ------------  ---------  ---------  -----------       ------    -----------  -----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                    PARTNERSHIP YEAR ENDED
                                                                         JUNE 30, 1997
                                                                  ---------------------------
                                                                   (IN THOUSANDS, EXCEPT PER
                                                                          UNIT DATA)
<S>                                                               <C>
BALANCE SHEET DATA (AS OF JUNE 30, 1997):
Current assets..................................................           $  70,261
Total assets....................................................             540,993
Current liabilities.............................................              60,742
Long-term debt (including current maturities)...................             237,268
Partners capital--General Partners..............................               4,972
Partners' capital--Limited Partners.............................             238,957
 
OPERATING DATA (PRO FORMA):
Capital expenditures(g).........................................           $  15,977
EBITDA:(h)......................................................           $  41,041
Net income per Unit(i)                                                     $     .46
Retail propane gallons sold.....................................             213,700
</TABLE>
 
                                       22
<PAGE>
 
<TABLE>
<CAPTION>
                                                                 Predecessors
                                              --------------------------------------------------
                                                                                     Acquisition/
                                                                                     Disposition
                                                                                     Adjustments
                                                             Empire        Coast      (July 1,
                                 Partnership    Synergy      Energy       (Aug 1,       1996
                                  (Dec. 17,    (July 1,     (July 1,       1996          to
                                   1996 to       1996         1996          to        December
                                  March 31,   to Dec. 16,  to Dec. 16,   Dec. 16,        16,       Pro Forma
                                    1997)        1996)        1996)        1996)      1996)(a)    Adjustments
                                 -----------  -----------  -----------  -----------  -----------  -----------
<S>                              <C>          <C>          <C>          <C>          <C>          <C>
                                                                (in thousands)
STATEMENT OF OPERATIONS DATA:
  Revenues.....................   $ 260,936    $  44,066    $  43,201    $ 185,460    $   1,840    $
  Cost of sales................     209,391       23,322       23,310      173,155        1,339       (1,558)(b)
                                 -----------  -----------  -----------  -----------  -----------  -----------
  Gross profit.................      51,545       20,744       19,891       12,305          501        1,558
  Operating, general and
    administrative expenses....      27,968       15,071       13,394       10,579          360       (1,163)(c)
  Depreciation and
    amortization...............       4,394        1,904        2,930        1,604           71           45(d)
                                 -----------  -----------  -----------  -----------  -----------  -----------
  Operating income.............      19,183        3,769        3,567          122           70        2,676
  Interest expense.............       5,228        3,311        3,621        2,238           86         (985)(e)
                                 -----------  -----------  -----------  -----------  -----------  -----------
  Net income (loss) before
    income taxes...............      13,955          458          (54)      (2,116)         (16)       3,661
  Income taxes (benefit).......          25          298           32         (748)           7          456(f)
                                 -----------  -----------  -----------  -----------  -----------  -----------
  Net income (loss)............   $  13,930    $     160    $     (86)   $  (1,368)   $     (23)   $   3,205
                                 -----------  -----------  -----------  -----------  -----------  -----------
                                 -----------  -----------  -----------  -----------  -----------  -----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                     PARTNERSHIP     PARTNERSHIP
                                                                                   PRO FORMA NINE    ACTUAL NINE
                                                                                    MONTHS ENDED     MONTHS ENDED
                                                                                   MARCH 31, 1997   MARCH 31, 1998
                                                                                   ---------------  --------------
<S>                                                                                <C>              <C>
STATEMENT OF OPERATIONS DATA:
Revenues.........................................................................    $   535,503      $  623,267
Cost of sales....................................................................        428,959         505,302
                                                                                   ---------------  --------------
Gross profit.....................................................................        106,544         117,965
Operating, general and administrative expenses...................................         66,209          72,757
Depreciation and amortization....................................................         10,948          13,615
                                                                                   ---------------  --------------
Operating income.................................................................         29,387          31,593
Interest expense.................................................................         13,499          14,641
                                                                                   ---------------  --------------
Net income (loss) before income taxes............................................         15,888          16,952
Income taxes (benefit)...........................................................             70              95
                                                                                   ---------------  --------------
Net income (loss)................................................................    $    15,818      $   16,857
                                                                                   ---------------  --------------
                                                                                   ---------------  --------------
</TABLE>
 
                                       23
<PAGE>
 
<TABLE>
<CAPTION>
                                                       NINE MONTHS ENDED   NINE MONTHS ENDED
                                                         MARCH 31, 1997      MARCH 31, 1998
                                                          (PRO FORMA)            ACTUAL
                                                       ------------------  ------------------
<S>                                                    <C>                 <C>
BALANCE SHEET DATA:
  (AS OF MARCH 31, 1998)
 
Current assets                                             $                   $   63,905
Total assets.........................................                             580,224
Current liabilities..................................                              47,160
Long-term debt (including current maturities)........                             237,089
Partners capital--General Partners...................                               5,970
Partner's capital--Limited Partners..................                             288,314
OPERATING DATA:
Capital expenditures(g)..............................      $   13,964          $   25,078
EBITDA(h)............................................      $   40,335          $   45,208
Net income per Unit(i)                                     $      .94          $      .92
Retail propane gallons sold..........................         183,100             199,700
</TABLE>
 
- ------------------------
 
(a) Reflects the results of Myers Propane Gas Company, a subsidiary of NOR, and
    pro forma five and one-half month (or three month) results of propane
    operations acquired by Northwestern Growth subsequent to July 1, 1996, all
    of which were contributed to the Operating Partnership as part of the
    Transactions.
 
(b) Reflects elimination of last-in, first-out (LIFO) inventory adjustment as of
    December 16, 1996, because historically higher inventory levels as of June
    30 fiscal year end would not require depletion of LIFO layers.
 
(c) Reflects the full period effect of operating expense savings resulting from
    the consolidation of certain operations subsequent to December 16, 1996, as
    well as the elimination of certain operating and general and administrative
    expenses associated with the operation of the Partnership, as follows:
 
<TABLE>
<S>                                                                   <C>
Eliminated bank and consulting fees.................................  $     149
Consolidation of certain retail locations...........................        321
Corporate overhead consolidation....................................        693
                                                                      ---------
                                                                      $   1,163
                                                                      ---------
                                                                      ---------
</TABLE>
 
(d) Reflects the additional depreciation and amortization expense due to the
    increase in property and intangibles that result from applying the purchase
    method of accounting to the Empire Energy and Coast acquisitions.
 
                                       24
<PAGE>
(e) Reflects the following adjustment to interest expense directly resulting
    from the Transactions, as follows:
 
<TABLE>
<S>                                                                  <C>
Historical interest expense, net...................................  $  19,114
Interest expense from acquisitions.................................         86
                                                                     ---------
                                                                        19,200
                                                                     ---------
Pro forma interest expense, net applicable to the Partnership:
$220,000 first mortgage notes at a rate of 7.53% per annum.........     16,566
Interest expense attributable to working capital facility based on
  actual borrowings by the Partnership.............................        380
Interest expense attributable to actual purchase contract
  obligations assumed by the Partnership at interest rates ranging
  from 5% to 10%...................................................        929
Debt expense amortization based on $7,401 debt issuance costs......        527
Less--actual interest income of the Partnership for the period from
  December 17, 1996 to June 30, 1977...............................       (187)
                                                                     ---------
Pro forma interest expense, net adjustment.........................     18,215
                                                                     ---------
                                                                     $    (985)
                                                                     ---------
                                                                     ---------
</TABLE>
 
(f) Reflects the elimination of income tax provision (benefit), because income
    taxes are not borne by the Partnership (except for income taxes applicable
    to operations conducted by the Partnership's corporate subsidiary).
 
(g) The Partnership's capital expenditures fall generally into three categories:
    (i) growth capital expenditures, which include expenditures for the purchase
    of new propane tanks and other equipment to facilitate expansion of the
    Partnership's retail customer base, (ii) maintenance capital expenditures,
    which include expenditures for repairs that extend the life of the assets
    and replacement of property, plant and equipment, and (iii) acquisition
    capital expenditures.
 
(h) EBITDA consists of net income before depreciation, amortization, interest
    and income taxes. EBITDA should not be considered as an alternative to net
    income (as an indicator of operating performance) or as an alternative to
    cash flow, and it is not a measure of performance or financial condition
    under generally accepted accounting principles, but it provides additional
    information for evaluating the Partnership's ability to distribute the
    Minimum Quarterly Distribution and to service and incur indebtedness. Cash
    flows in accordance with generally accepted accounting principles consist of
    cash flows from operating, investing and financing activities; cash flows
    from operating activities reflect net income (including charges for interest
    and income taxes, which are not reflected in EBITDA), adjusted for noncash
    charges or income (which are reflected in EBITDA) and changes in operating
    assets and liabilities (which are not reflected in EBITDA). Further, cash
    flows from investing and financing activities are not included in EBITDA.
 
(i) Net income per Unit is computed by dividing the limited partners' interest
    in net income by the weighted average number of Units outstanding.
 
                                       25
<PAGE>
        MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
                             RESULTS OF OPERATIONS
 
    THE FOLLOWING DISCUSSION OF THE HISTORICAL FINANCIAL CONDITION AND RESULTS
OF OPERATIONS FOR THE PARTNERSHIP SHOULD BE READ IN CONJUNCTION WITH THE
SELECTED PRO FORMA FINANCIAL AND OPERATING DATA AND NOTES THERETO, THE SELECTED
HISTORICAL FINANCIAL AND OPERATING DATA AND NOTES THERETO AND THE HISTORICAL
FINANCIAL STATEMENTS AND NOTES THERETO INCORPORATED BY REFERENCE IN THIS
PROSPECTUS.
 
GENERAL
 
    The Partnership is a Delaware limited partnership formed to own and operate
the propane business and assets of Synergy, Empire Energy and Coast. The
Partnership believes that it is the fifth largest retail marketer of propane in
the United States, serving more than 380,000 residential, commercial, industrial
and agricultural customers from 301 customer service centers in 27 states as of
March 31, 1998.
 
    Because a substantial portion of the Partnership's propane is used in the
weather-sensitive residential markets, the temperatures realized in the
Partnership's areas of operations, particularly during the six-month peak
heating season, have a significant effect on the financial performance of the
Partnership. In any given area, warmer-than-normal temperatures will tend to
result in reduced propane use, while sustained colder-than-normal temperatures
will tend to result in greater propane use. Therefore, information on normal
temperatures is used by the Partnership in understanding how historical results
of operations are affected by temperatures that are colder or warmer than normal
and in preparing forecasts of future operations, which are based on the
assumption that normal weather will prevail in each of the Partnership's
regions.
 
    Gross profit margins are not only affected by weather patterns but also by
changes in customer mix. For example, sales to residential customers ordinarily
generate higher margins than sales to other customer groups, such as commercial
or agricultural customers. In addition, gross profit margins vary by geographic
region. Accordingly, profit margins could vary significantly from year to year
in a period of identical sales volumes.
 
ANALYSIS OF RESULTS OF OPERATIONS
 
    The following discussion compares the results of operations and other data
of the Partnership for the nine months ended March 31, 1998 to the pro forma
nine months ended March 31, 1997 and for the pro forma year ended June 30, 1997
to the pro forma year ended June 30, 1996. Note all pro forma information has
been prepared assuming that the Partnership had been in existence at the
beginning of the periods presented.
 
<TABLE>
<CAPTION>
NINE MONTHS ENDED MARCH 31,                                              1998         1997
THOUSANDS OF DOLLARS (UNAUDITED)                                       (ACTUAL)   (PRO FORMA)
- --------------------------------------------------------------------  ----------  ------------
<S>                                                                   <C>         <C>
Revenues............................................................  $  623,267   $  535,503
Cost of sales.......................................................     505,302      428,959
                                                                      ----------  ------------
Gross profit........................................................  $  117,965   $  106,544
                                                                      ----------  ------------
                                                                      ----------  ------------
</TABLE>
 
    VOLUME.  During the nine months ended March 31, 1998, the Partnership sold
199.7 million retail propane gallons, an increase of 16.6 million gallons, or
9.1%, from the 183.1 million retail propane gallons sold during the pro forma
nine months ended March 31, 1997. Wholesale volumes were 520.9 million gallons
and 244.0 million gallons for the nine months ended March 31, 1998 and 1997
respectively, which represents an increase of 276.9 million gallons or 113.5%.
The increase in wholesale volume is primarily attributable to the expansion of
the wholesale business since the formation of the Partnership in December 1996.
Acquisitions of new propane businesses since March 31, 1997, accounted for 17.1
million retail gallons during the nine months ended March 31, 1998.
 
                                       26
<PAGE>
    For the nine months ended March 31, 1998, the impact of the recent El Nino
winter adversely impacted average customer sales due to the reduced heating
degree days during the winter months in the markets served by the Partnership.
While heating degree days generally measures the impact of temperatures on the
Partnership's business, other factors such as geographic mix, magnitude and
duration of temperature and other weather conditions can also impact sales
volumes. The overall impact of weather is believed by management to have had an
adverse impact on the Partnership's retail sales volume (excluding acquisitions)
and earnings compared to both normal and year ago levels for the nine months
ended March 31, 1998. The nine months ended March 31 historically accounts for
approximately 96% of the Partnership's EBITDA.
 
    REVENUES.  Revenues increased by $87.8 million, or 16.4%, to $623.3 million
for the nine months ended March 31, 1998, as compared to $535.5 million for the
pro forma nine months ended March 31, 1997. This increase was attributable to an
increase in wholesale Natural Gas Liquids revenues of $175.2 million or 74.6% to
$409.9 million for the nine months ended March 31, 1998, as compared to $234.7
million for the pro forma nine months ended March 31, 1997, reflecting the
increase in wholesale volume mentioned above. The revenues for the retail Liquid
Propane Gas business decreased by $4.2 million, or 2.2%, to $185.9 million for
the nine months ended March 31, 1998, as compared to $190.1 million for the pro
forma nine months ended March 31, 1997. This decrease was a result of a
reduction in both the average cost and the average sales price per gallon of
propane offset to some extent by the increase in sales volume described above.
 
    COST OF PRODUCT SOLD.  Cost of product sold increased by $76.3 million, or
17.8%, to $505.3 million for the nine months ended March 31, 1998, as compared
to $429.0 million for the pro forma nine months ended March 31, 1997. The
increase in cost of product sold was primarily due to the increased sales volume
described above. As a percentage of revenues, cost of product sold increased to
81.1% for the nine months ended March 31, 1998, as compared to 80.1% for the pro
forma nine months ended March 31, 1997.
 
    GROSS PROFIT.  Gross profit increased by $11.4 million, or 10.7%, to $118.0
million for the nine months ended March 31, 1998, as compared to $106.5 million
for the pro forma nine months ended March 31, 1997. Retail per gallon margins
for the nine months ended March 31, 1998, were slightly smaller than for the
same period last year, primarily due to reductions in the higher margin
residential sales volumes due to the mild winter heating season. As a percentage
of revenues, gross profit decreased to 18.9% for the nine months ended March 31,
1998, as compared to 19.9% for the pro forma nine months ended March 31, 1997.
The decrease was caused by higher wholesale volumes which have lower margins.
Gross profit from propane businesses acquired since March 31, 1997, was $9.5
million for the nine months ended March 31, 1998.
 
    OPERATING, GENERAL AND ADMINISTRATIVE EXPENSES.  Operating, general and
administrative expenses increased by $6.5 million, or 9.9%, to $72.8 million for
the nine months ended March 31, 1998, as compared to $66.2 million for the pro
forma nine months ended March 31, 1997. Approximately $4.3 million of this
increase was attributable to increases in operating expenses resulting from the
acquisitions of new businesses since March 31, 1997, and the correspondingly
increased sales volumes discussed above. As a percentage of revenues, operating,
general and administrative expenses decreased to 11.7% for the nine months ended
March 31, 1998, as compared to 12.4% for the pro forma nine months ended March
31, 1997.
 
<TABLE>
<CAPTION>
PRO FORMA FISCAL YEARS ENDED JUNE 30,
THOUSANDS OF DOLLARS (UNAUDITED)                                           1997        1996
- ----------------------------------------------------------------------  ----------  ----------
<S>                                                                     <C>         <C>
Revenues..............................................................  $  664,197  $  595,790
Cost of sales.........................................................     534,892     455,984
                                                                        ----------  ----------
Gross profit..........................................................  $  129,305  $  139,806
                                                                        ----------  ----------
                                                                        ----------  ----------
</TABLE>
 
                                       27
<PAGE>
    VOLUME.  During the year ended June 30, 1997, the Partnership sold 213.7
million retail propane gallons, a decrease of 21.3 million gallons or 9.1% from
the 235.0 million retail propane gallons sold during the year ended June 30,
1996. The decrease in retail volume was primarily attributable to the decline in
volume of sales in the three months ended March 31, 1997, compared to the three
months ended March 31, 1996. The decline in retail volume was primarily
attributed to national temperatures that averaged 14% warmer than last year and
13% warmer in the markets served by the Partnership. Wholesale sales volumes
were 330.1 million gallons and 328.3 million gallons for the years ended June
30, 1997 and 1996, respectively.
 
    REVENUES.  Revenues increased by $68.4 million or 11.5% to $664.2 million
for the year ended June 30, 1997, as compared to $595.8 million for the year
ended June 30, 1996. This increase was attributable to an increase in wholesale
revenues of $84.5 million or 26.7% to $400.7 million for the year ended June 30,
1997, as compared to $316.2 million for the year ended June 30, 1996, due
primarily to higher product costs and sales prices. Revenues for the retail
business declined by $16.1 million or 5.8% to $263.5 million for the year ended
June 30, 1997, as compared to $279.6 million for the year ended June 30, 1996.
This decrease was due to the decline in retail sales volume described above.
 
    COST OF PRODUCT SOLD.  Cost of product sold increased by $78.9 million, or
17.3% to $534.9 million for the year ended June 30, 1997, as compared to $456.0
million for the year ended June 30, 1996. The increase in cost of product sold
was primarily due to the higher product costs described above. As a percentage
of revenues, cost of product sold increased to 80.5% for the year ended June 30,
1997, as compared to 76.5% for the year ended June 30, 1996.
 
    GROSS PROFIT.  Gross profit decreased $10.5 million or 7.5% to $129.3
million for the year ended June 30, 1997, as compared to $139.8 million for the
year ended June 30, 1996, primarily due to the reduction in retail sales volume
and higher product costs as discussed above.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    OPERATING ACTIVITIES.  Cash provided by operating activities during the
nine-month period ended March 31, 1998, was $11.6 million. Cash flow from
operations included net income of $16.9 million, and noncash charges of $12.9
million for the period, principally comprised of depreciation and amortization
expense. The impact of working capital changes decreased cash flow by
approximately $18.2 million.
 
    INVESTING ACTIVITIES.  Cash used in investment activities for the nine-month
period ended March 31, 1998, totaled $25.1 million, which was primarily related
to Partnership acquisitions and for purchases of property, plant and equipment.
 
    FINANCING ACTIVITIES.  Cash provided by financing activities was $11.1
million for the nine months ended March 31, 1998, which principally reflects the
$40.8 million net proceeds received from the issuance of 1,960,000 additional
Common Units, offset by repayments of purchase contract obligations of $3.1
million, payment of financing costs of $2.4 million and cash distributions paid
to Unitholders of $26.1 million.
 
    FINANCING AND SOURCES OF LIQUIDITY.  The Operating Partnership's obligations
under the Note Agreement under which its Senior Notes were issued and its Bank
Credit Facility are secured by a security interest in the Operating
Partnership's inventory, accounts receivable and certain customer storage tanks.
The Note Agreement and the Bank Credit Facility contain various terms and
covenants including financial ratio covenants with respect to debt and interest
coverage and limitations, among others, on the ability of the Operating
Partnership and its subsidiary to incur additional indebtedness, create liens,
make investments and loans, enter into mergers, consolidations or sales of all
or substantially all assets and make asset sales. Generally, so long as no
default exists or would result, the Partnership is permitted to make
distributions during each fiscal quarter in an amount not in excess of Available
Cash with respect to the
 
                                       28
<PAGE>
immediately preceding quarter. The Operating Partnership was in compliance with
all terms and covenants at March 31, 1998.
 
    In January 1998, the partnership sold an aggregate of 1,960,000 Common Units
at $22.125 per unit pursuant to an underwritten public offering. Net proceeds to
the Partnership were approximately $40.8 million. The Partnership used
approximately $10.0 million of net proceeds for general business purposes and
the balance to repay amounts outstanding under the Bank Credit Facility.
 
RECENTLY ISSUED ACCOUNTING STANDARDS
 
    Financial Accounting Standards Board Statement No. 128, "Earnings per Share"
("Statement No. 128"), issued in February 1997 and effective for fiscal years
ending after December 15, 1997, establishes and simplifies standards for
computing and presenting earnings per share. Implementation of Statement No. 128
did not have a material impact on the Partnership's computation or presentation
of earnings per unit, as the Partnership's common stock equivalents have had no
material effect on earnings per unit amounts.
 
YEAR 2000 COMPLIANCE
 
    The Partnership utilizes software and related technologies throughout its
businesses that will be affected by the date change in the year 2000. An
internal study is currently under way to determine the full scope and related
costs to insure that the Partnership's systems continue to meet its internal
needs and the needs of its customers. The Partnership has begun to incur
expenses in 1998 to resolve this issue. The expenses may continue through the
year 1999 but are not expected to be material to the Partnership's operations.
 
                                       29
<PAGE>
                                    BUSINESS
 
GENERAL
 
    The Partnership is principally engaged in (i) the retail distribution of
propane for residential, commercial, industrial, agricultural and other retail
uses, (ii) the wholesale marketing and distribution of propane and natural gas
liquids to the retail propane industry, the chemical and petrochemical
industries and other commercial and agricultural markets, (iii) the repair and
maintenance of propane heating systems and appliances and (iv) the sale of
propane-related supplies, appliances and other equipment. Propane, a by-product
of natural gas processing and petroleum refining, is a clean-burning energy
source recognized for its transportability and ease of use relative to
alternative stand-alone energy sources. The retail propane business of the
Partnership consists principally of transporting propane to its retail
distribution outlets and then to tanks located on its customers' premises.
Retail propane use falls into four broad categories: (i) residential, (ii)
industrial and commercial, (iii) agricultural and (iv) other applications,
including motor fuel sales. Residential customers use propane primarily for
space and water heating. Industrial customers use propane primarily as fuel for
forklifts and stationary engines, to fire furnaces, as a cutting gas, in mining
operations and in other process applications. Commercial customers, such as
restaurants, motels, laundries and commercial buildings, use propane in a
variety of applications, including cooking, heating and drying. In the
agricultural market, propane is primarily used for tobacco curing, crop drying,
poultry brooding and weed control. Other retail uses include motor fuel for cars
and trucks, outdoor cooking and other recreational purposes, propane resales and
sales to state and local governments. In its wholesale operations, the
Partnership sells propane principally to large industrial customers and other
propane distributors.
 
    The retail propane business is a "margin-based" business in which gross
profits depend on the excess of sales prices over propane supply costs. Sales of
propane to residential and commercial customers, which account for the vast
majority of the Partnership's gross profit, have provided a relatively stable
source of income for the Partnership. Based on pro forma fiscal 1997 retail
propane gallons sold, the customer base consisted of 55% residential, 26%
commercial and industrial and 19% agricultural and other customers. Sales to
residential customers have generally provided higher gross margins than other
retail propane sales. While commercial propane sales are generally less
profitable than residential retail sales, the Partnership has traditionally
relied on this customer base to provide a steady, noncyclical source of
revenues. No single customer accounted for more than 1% of total revenues.
 
    Because a substantial amount of propane is sold for heating purposes, the
severity of winter and resulting residential and commercial heating usage have
an important impact on the Partnership's earnings. Approximately two-thirds of
the Partnership's retail propane sales usually occur during the six-month
heating season from October through March. As a result of this seasonality, the
Partnership's sales and operating profits are concentrated in its second and
third fiscal quarters. Cash flows from operations, however, are greatest from
November through April, when customers pay for propane purchased during the
six-month peak season. To the extent the Managing General Partner deems
appropriate, the Partnership may reserve cash from these periods for
distribution to Unitholders during periods with lower cash flows from
operations. Sales and profits are subject to variation from month to month and
from year to year, depending on temperature fluctuations.
 
    The Partnership's wholesale operations engage in the marketing of propane to
independent dealers, major interstate marketers and the chemical and
petrochemical industries. The Partnership participates to a lesser extent in the
marketing of other natural gas liquids, the processing and marketing of natural
gas and the gathering of crude oil. The Partnership either owns or has
contractual rights to use transshipment terminals, rail cars, long-haul tanker
trucks, pipelines and storage capacity. The Partnership believes that its
wholesale marketing and processing activities position it to achieve product
cost advantages and to avoid shortages during periods of tight supply to an
extent not generally available to other retail propane distributors.
 
                                       30
<PAGE>
    Propane competes primarily with natural gas, electricity and fuel oil as an
energy source, principally on the basis of price, availability and portability.
Propane is more expensive than natural gas on an equivalent BTU basis in
locations served by natural gas, but serves as a substitute for natural gas in
rural and suburban areas where natural gas is unavailable or portability of
product is required. Propane is generally less expensive to use than electricity
for space heating, water heating, clothes drying and cooking. Although propane
is similar to fuel oil in certain applications and market demand, propane and
fuel oil compete to a lesser extent primarily because of the cost of converting
from one to the other.
 
    As of March 31, 1998, the Partnership's retail operations consisted of 301
customer service centers in 27 states. As of such date, the Partnership owned a
fleet of approximately 50 transport truck tractors, approximately 60 transport
trailers, approximately 800 bobtail trucks and approximately 900 other delivery
and service vehicles. In addition, in its retail operations, the Partnership
owns an aggregate of approximately 21 million gallons of above-ground propane
storage capacity at its customer service centers. In many states, certain fire
safety regulations restrict the refilling of a leased tank solely to the propane
supplier that owns the tank. The inconvenience of switching tanks minimizes a
customer's tendency to switch among suppliers of propane.
 
BUSINESS STRATEGY
 
    The principal elements of the Partnership's business strategy are to (i)
extend and refine its existing service orientation, (ii) continue to pursue
balanced growth through small and large acquisitions, internal growth at its
existing customer service centers and start-ups of new customer service centers,
(iii) enhance the profitability of its existing operations by continuing to
integrate the Combined Operations, implement entrepreneurially oriented local
manager incentive programs, where appropriate, and centralize administrative
systems and (iv) capitalize on the Partnership's national wholesale supply and
logistics business.
 
    FOCUS ON CUSTOMER SERVICE.  The Partnership seeks to be recognized in the
marketplace as the most customer service-oriented propane supplier. Although
propane is a commodity product, the Partnership believes that it will be able to
distinguish itself from the competition by providing reliable and timely
delivery of propane at competitive prices. The Partnership believes that
establishing and clearly communicating standards of service and performance
expectations at all levels of the Partnership, and rewarding its employees
accordingly, will enable the Partnership to achieve its service goals. The
Partnership has incentive programs at certain customer service centers targeted
to fostering an entrepreneurial environment at the customer service center
level. These programs provide substantial rewards to local managers for managing
service-oriented and profitable operations. The Partnership intends to expand
such incentive programs to additional customer service locations, where
appropriate.
 
    CONTINUED BALANCED GROWTH.  The Partnership intends to continue to pursue
balanced growth through small and large acquisitions, internal growth at its
existing customer service centers and start-ups of new customer service centers.
Acquisitions are expected to be the principal means of growth for the
Partnership, as the retail propane industry is mature and overall demand for
propane is expected to experience limited growth in the foreseeable future. The
Partnership believes that the fragmented nature of the retail propane industry
provides significant opportunities for growth through strategic acquisitions.
Industry sources indicate that there are over 8,000 retail propane operations in
the United States, of which the ten largest account for approximately 33% of
industry volumes. The Partnership's acquisition strategy concentrates on
companies that have one or more of the following characteristics: (i) locations
in areas serviced by the Partnership that may be combined with existing
operations, providing greater economies of scale at the customer service center
level, (ii) a recent record of growth and a local reputation for quality
service, (iii) locations in areas that are relatively colder and (iv) operations
with a relatively high proportion of sales to the more profitable residential
customer segment. As part of its acquisition program, the Partnership generally
expects to retain the name and identity of the acquired entity, which the
Partnership believes will preserve the goodwill of the acquired business and
promote continued local customer loyalty. The Partnership's ability to make
acquisitions is facilitated by the availability of a
 
                                       31
<PAGE>
$75.0 million acquisition credit facility and the ability to issue additional
limited partner interests. In calendar 1997, the Partnership acquired businesses
in Arizona, California, Florida, New Hampshire and North Carolina which added
approximately 28,000 customers and annual retail propane sales of approximately
24 million gallons. The aggregate purchase price for these acquisitions was
approximately $44 million, of which approximately $30 million was in the form of
Common Units (approximately 1.3 million Common Units). There can be no
assurance, however, that the Partnership will continue to identify attractive
acquisition candidates in the future, that the Partnership will be able to
acquire such businesses on economically acceptable terms, that any acquisitions
will not be dilutive to earnings and distributions to the Unitholders or that
any additional debt incurred to finance an acquisition will not affect the
ability of the Partnership to make distributions to the Unitholders. The
Partnership is not required under the Partnership Agreement to seek Unitholder
approval of any acquisition.
 
    The Partnership is from time to time engaged in ongoing discussions with
respect to acquisitions, and expects to continue to pursue such acquisition
opportunities actively. As of the date of this Prospectus, the Partnership does
not have any agreements with respect to any material acquisitions but is
involved in ongoing discussions with several companies and is continuing to
assess these and other acquisition opportunities. The Partnership is unable to
predict the size, number or timing of any future acquisitions.
 
    In addition to pursuing growth through acquisitions, the Partnership
continues to focus on internal growth at its existing customer service centers.
The Partnership seeks to achieve internal growth by, among other things,
providing superior service and instituting programs that encourage employees,
existing customers and local real estate agents and contractors to refer new
accounts. This strategy is being implemented primarily through the Partnership's
incentive programs that reward local managers for managing service-oriented and
profitable operations.
 
    In some instances, the Partnership may identify a market that has one or
more of the characteristics that would make it attractive for an acquisition but
in which there are no attractive available acquisition candidates. In certain of
these cases, the Partnership may seek to penetrate the market by establishing a
new customer service center. The Partnership believes it can successfully
initiate these start-up operations in attractive markets by identifying and
hiring local managers with proven propane service experience and establishing
programs that reward service-oriented and profitable operations and that allow
the managers to share in the growth of the business.
 
    ENHANCE PROFITABILITY OF ITS EXISTING OPERATIONS.  The Partnership believes
that it can enhance the profitability of its customer service centers by
integrating the Combined Operations, reducing inefficiencies in areas where
there is a geographic overlap of services and implementing "best practices" and
management incentive programs throughout the Partnership's operations. In
integrating the Combined Operations, the Partnership is in the process of
consolidating and centralizing ongoing administrative functions and systems,
which should enable local managers to devote their time to providing customer
service and achieving other performance goals. In addition, the Partnership
believes it can improve efficiencies in areas where there is a geographic
overlap of services provided by customer service centers. The Partnership's
management has identified effective operating programs and strategies used by
one of the constituent companies prior to the IPO but not used by one or more of
the others. The Partnership believes that the implementation of these "best
practices" throughout the Combined Operations will improve customer retention,
foster expansion of its customer base and create operating efficiencies and cost
savings opportunities. Furthermore, the Partnership believes that instituting
management incentive programs, where appropriate, and fostering an
entrepreneurial approach at additional customer service centers will give
managers the incentive to increase such customer service centers' profitability.
 
    CAPITALIZE ON NATIONAL SUPPLY AND LOGISTICS BUSINESS.  The Partnership has a
national wholesale natural gas liquids supply and logistics business with sales
of approximately 330 million gallons in fiscal 1997. The Partnership believes
that this business provides it with a reasonably secure, competitively priced
and efficient supply base to support the service goals of its existing customer
service centers. In addition,
 
                                       32
<PAGE>
the Partnership believes its wholesale and logistics business positions it well
for expansion through acquisitions or start-up operations in new markets. As
part of its wholesale business, the Partnership also provides product supply and
financial and technical assistance to certain small independent retailers. While
these arrangements provide some economic return to the Partnership, the
Partnership believes their greater value lies in the resulting relationships,
which position the Partnership to acquire such businesses in the event they
become available for purchase.
 
                      PARTNERSHIP STRUCTURE AND MANAGEMENT
 
    The Partnership conducts, in substantially every respect, the propane
businesses that were formerly conducted by Synergy, Empire Energy and Coast (as
well as those businesses that have been acquired since the IPO). The operations
of the Partnership are conducted through, and the operating assets are owned by,
the Operating Partnership, a Delaware limited partnership, and any other
subsidiary operating partnerships and corporations. The Partnership owns a
98.9899% limited partner interest in the Operating Partnership. The General
Partners are also the general partners of the Operating Partnership, with an
aggregate 1.0101% general partner interest in the Operating Partnership. The
General Partners therefore own an aggregate 2% general partner interest in the
Partnership and the Operating Partnership on a combined basis.
 
    The senior executives who managed Coast prior to the IPO manage and operate
the Partnership's business as the senior executives of the Managing General
Partner. The Managing General Partner and its affiliates do not receive any
management fee or other compensation in connection with its management of the
Partnership, but are reimbursed at cost for all direct and indirect expenses
incurred on behalf of the Partnership and all other necessary or appropriate
expenses allocable to the Partnership or otherwise reasonably incurred by the
Managing General Partner or its affiliates in connection with the operation of
the Partnership's business. The Special General Partner has no duty or right to
participate in the management or operation of the Partnership.
 
    Conflicts of interest may arise between the Managing General Partner and its
affiliates, on the one hand, and the Partnership, the Operating Partnership and
the Unitholders, on the other, including conflicts relating to the compensation
of the officers and employees of the Managing General Partner and the
determination of fees and expenses that are allocable to the Partnership. The
Managing General Partner has an audit committee (the "Audit Committee"),
consisting of three members, including two independent members of its Board of
Directors, that is available at the Managing General Partner's discretion to
review matters involving conflicts of interest. See "Conflicts of Interest and
Fiduciary Responsibilities."
 
    The following chart depicts the organization and ownership of the
Partnership and the Operating Partnership as of the date of this Prospectus. The
percentages reflected in the following chart represent the approximate ownership
interest in each of the Partnership and the Operating Partnership individually
and not on an aggregate basis. Except in the following chart, the ownership
percentages referred to in this Prospectus reflect the approximate effective
ownership interest of the Unitholders in the Partnership and the Operating
Partnership on a combined basis. The 2% ownership percentage of the General
Partners
 
                                       33
<PAGE>
referred to in this Prospectus reflects the approximate effective ownership
interest of the General Partners in the Partnership and the Operating
Partnership on a combined basis.
 
                                  [CHART]
            EFFECTIVE AGGREGATE OWNERSHIP OF THE PARTNERSHIP AND THE
                             OPERATING PARTNERSHIP
Public Unitholders' Common Units 65.4%
General Partners' Subordinated Units 32.6%
General Partners' Combined General Partner Interest 2.0%
 
    NORTHWESTERN CORPORATION ("NOR") has 100% Ownership of NORTHWESTERN GROWTH
CORPORATION ("Northwestern Growth"), which has 100% Ownership of CORNERSTONE
PROPANE GP, INC. ("Managing General Partner").
 
    The Managing General Partner owns (i) 5,677,040 Subordinated Units
(representing a 28.3394% Limited Partner Interest) and has a 0.7686% Managing
General Partner Interest in CORNERSTONE PROPANE PARTNERS, L.P. ("Partnership"),
(ii) a 0.7764% Managing General Partner interest in CORNERSTONE PROPANE, L.P.
("Operating Partnership") and (iii) an 82.5% Common Stock Ownership Interest in
SYN INC. ("Synergy" or "Special General Partner"). (The remaining 17.5% Common
Stock Ownership Interest in Synergy is owned by unaffiliated shareholders.)
 
    Synergy owns (i) 920,579 Subordinated Units (representing a 4.5954% Limited
Partner Interest) and a 0.2314% Special General Partner Interest in the
Partnership and (ii) a 0.2337% Special General Partner Interest in the Operating
Partnership.
 
    The remaining 66.0652% Limited Partnership Interest in the Partnership is
owned by the PUBLIC UNITHOLDERS (13,234,411 Common Units).
 
    The Partnership has a 98.9899% Limited Partner Interest in the Operating
Partnership and the Operating Partnership has 100% ownership of Cornerstone
Sales & Service Corporation and Flame, Inc.
 
                                       34
<PAGE>
                        DESCRIPTION OF THE COMMON UNITS
 
THE UNITS
 
    The Common Units and the Subordinated Units represent limited partner
interests in the Partnership, which entitle the holders thereof to participate
in Partnership distributions and to exercise the rights or privileges available
to limited partners under the Partnership Agreement. The holders of Common Units
do not have preemptive rights to acquire additional Common Units or other
partnership interests that may be issued by the Partnership. For a description
of the relative rights and preferences of holders of Common Units and
Subordinated Units in and to Partnership distributions, together with a
description of the circumstances under which Subordinated Units may convert into
Common Units, see "Cash Distribution Policy." For a description of the rights
and privileges of limited partners under the Partnership Agreement, see "The
Partnership Agreement."
 
TRANSFER AGENT AND REGISTRAR
 
    Continental Stock Transfer & Trust Company serves as registrar and transfer
agent (the "Transfer Agent") for the Common Units and receives a fee from the
Partnership for serving in such capacities. All fees charged by the Transfer
Agent for transfers of Common Units will be borne by the Partnership and not by
the holders of Common Units, except that fees similar to those customarily paid
by stockholders for surety bond premiums to replace lost or stolen certificates,
taxes and other governmental charges, special charges for services requested by
a holder of a Common Unit and other similar fees or charges will be borne by the
affected holder. There will be no charge to holders for disbursements of the
Partnership's cash distributions. The Partnership has agreed to indemnify the
Transfer Agent, its agents and each of their respective shareholders, directors,
officers and employees against all claims and losses that may arise out of acts
performed or omitted in respect of its activities as such, except for any
liability due to any negligence, gross negligence, bad faith or intentional
misconduct of the indemnified person or entity.
 
    The Transfer Agent may at any time resign, by notice to the Partnership, or
be removed by the Partnership, such resignation or removal to become effective
upon the appointment by the Partnership of a successor transfer agent and
registrar and its acceptance of such appointment. If no successor has been
appointed and accepted such appointment within 30 days after notice of such
resignation or removal, the Managing General Partner is authorized to act as the
transfer agent and registrar until a successor is appointed.
 
TRANSFER OF COMMON UNITS
 
    Persons acquiring Common Units in this offering and subsequent transferees
of Common Units (or their brokers, agents or nominees on their behalf) who wish
to become Unitholders of record will be required to execute transfer
applications before the acquisition or transfer of such Common Units will be
registered on the records of the Transfer Agent and before cash distributions or
federal income tax allocations can be made to the acquiror or transferee. Until
a Common Unit has been transferred on the books of the Partnership, the
Partnership and the Transfer Agent, notwithstanding any notice to the contrary,
may treat the record holder thereof as the absolute owner for all purposes,
except as otherwise required by law or stock exchange regulations. By executing
and delivering a transfer application, the transferee of Common Units (i)
becomes the record holder of such Common Units and shall constitute an assignee
until admitted into the Partnership as a substituted limited partner, (ii)
automatically requests admission as a substituted limited partner in the
Partnership, (iii) agrees to be bound by the terms and conditions of, and
executes, the Partnership Agreement, (iv) represents that such transferee has
the capacity, power and authority to enter into the Partnership Agreement, (v)
grants powers of attorney to officers of the Managing General Partner and any
liquidator of the Partnership as specified in the Partnership Agreement, and
(vi) makes the consents and waivers contained in the Partnership Agreement. An
assignee will become a substituted limited partner of the Partnership in respect
of the transferred
 
                                       35
<PAGE>
Common Units upon the consent of the Managing General Partner and the
recordation of the name of the assignee on the books and records of the
Partnership. Such consent may be withheld in the sole discretion of the Managing
General Partner.
 
    Common Units are securities and are transferable according to the laws
governing transfer of securities. In addition to other rights acquired upon
transfer, the transferor gives the transferee the right to request admission as
a substituted limited partner in the Partnership in respect of the transferred
Common Units. A person acquiring Common Units who does not execute and deliver a
transfer application obtains only (a) the right to assign the Common Units to a
purchaser or other transferee and (b) the right to transfer the right to seek
admission as a substituted limited partner in the Partnership with respect to
the transferred Common Units. Thus, a person acquiring Common Units who does not
execute and deliver a transfer application will not receive cash distributions
or federal income tax allocations unless the Common Units are held in a nominee
or "street name" account and the nominee or broker has executed and delivered a
transfer application with respect to such Common Units, and may not receive
certain federal income tax information or reports furnished to record holders of
Common Units. The transferor of Common Units will have a duty to provide such
transferee with all information that may be necessary to obtain registration of
the transfer of the Common Units, but a transferee agrees, by acceptance of the
certificate representing Common Units, that the transferor will not have a duty
to insure the execution of the transfer application by the transferee and will
have no liability or responsibility if such transferee neglects to or chooses
not to execute and forward the transfer application to the Transfer Agent. See
"The Partnership Agreement--Status as Limited Partner or Assignee."
 
                            CASH DISTRIBUTION POLICY
 
GENERAL
 
    The Partnership will distribute to its partners, on a quarterly basis, all
of its Available Cash in the manner described herein. Available Cash is defined
in the Glossary and generally means, with respect to any quarter of the
Partnership, all cash on hand at the end of such quarter less the amount of cash
reserves that is necessary or appropriate in the reasonable discretion of the
Managing General Partner to (i) provide for the proper conduct of the
Partnership's business, (ii) comply with applicable law or any Partnership debt
instrument or other agreement, or (iii) provide funds for distributions to
Unitholders and the General Partners in respect of any one or more of the next
four quarters.
 
    Cash distributions will be characterized as distributions from either
Operating Surplus or Capital Surplus. This distinction affects the amounts
distributed to Unitholders relative to the General Partners, and under certain
circumstances it determines whether holders of Subordinated Units receive any
distributions. See "--Quarterly Distributions of Available Cash."
 
    Operating Surplus is defined in the Glossary and refers generally to (i) the
cash balance of the Partnership on the date the Partnership commenced
operations, plus $25.0 million, plus all cash receipts of the Partnership from
its operations since the closing of the Transactions, less (ii) all Partnership
operating expenses, debt service payments (including reserves therefor but not
including payments required in connection with the sale of assets or any
refinancing with the proceeds of new indebtedness or an equity offering),
maintenance capital expenditures and reserves established for future Partnership
operations, in each case since the closing of the Transactions.
 
    Capital Surplus is also defined in the Glossary and will generally be
generated only by borrowings (other than for working capital purposes), sales of
debt and equity securities and sales or other dispositions of assets for cash
(other than inventory, accounts receivable and other assets all as disposed of
in the ordinary course of business).
 
    To avoid the difficulty of trying to determine whether Available Cash
distributed by the Partnership is from Operating Surplus or from Capital
Surplus, all Available Cash distributed by the Partnership from
 
                                       36
<PAGE>
any source will be treated as distributed from Operating Surplus until the sum
of all Available Cash distributed since the commencement of the Partnership
equals the Operating Surplus as of the end of the quarter prior to such
distribution. Any Available Cash in excess of such amount (irrespective of its
source) will be deemed to be from Capital Surplus and distributed accordingly.
 
    If Available Cash from Capital Surplus is distributed in respect of each
Common Unit in an aggregate amount per Common Unit equal to $21.00 per Common
Unit (the "Initial Unit Price"), plus any Common Unit Arrearages, the
distinction between Operating Surplus and Capital Surplus will cease, and all
distributions of Available Cash will be treated as if they were from Operating
Surplus. The Partnership does not anticipate that there will be significant
distributions from Capital Surplus.
 
    The Subordinated Units are a separate class of interests in the Partnership,
and the rights of holders of such interests to participate in distributions to
partners differ from the rights of the holders of Common Units. For any given
quarter, any Available Cash will be distributed to the General Partners and to
the holders of Common Units, and may also be distributed to the holders of
Subordinated Units depending upon the amount of Available Cash for the quarter,
the amount of Common Unit Arrearages, if any, and other factors discussed below.
 
    The Incentive Distributions represent the right to receive an increasing
percentage of quarterly distributions of Available Cash from Operating Surplus
after the Target Distribution Levels have been achieved. The Target Distribution
Levels are based on the amounts of Available Cash from Operating Surplus
distributed in excess of the payments made with respect to the Minimum Quarterly
Distribution and Common Unit Arrearages, if any, and the related 2% distribution
to the General Partners.
 
    Subject to the limitations described under "The Partnership
Agreement--Issuance of Additional Securities," the Partnership has the authority
to issue additional Common Units or other equity securities of the Partnership
for such consideration and on such terms and conditions as are established by
the Managing General Partner in its sole discretion and without the approval of
the Unitholders. It is possible that the Partnership will fund acquisitions of
other propane businesses through the issuance of additional Common Units or
other equity securities of the Partnership. Holders of any additional Common
Units issued by the Partnership will be entitled to share equally with the
then-existing holders of Common Units in distributions of Available Cash by the
Partnership. In addition, the issuance of additional Partnership Interests may
dilute the value of the interests of the then-existing holders of Common Units
in the net assets of the Partnership. The General Partners will be required to
make an additional capital contribution to the Partnership or the Operating
Partnership in connection with the issuance of additional Partnership Interests.
 
    The discussion in the sections below indicates the percentages of cash
distributions required to be made to the General Partners and the holders of
Common Units and the circumstances under which holders of Subordinated Units are
entitled to cash distributions and the amounts thereof. Distributions and
allocations to the General Partners will be made pro rata in accordance with
their respective general partner interests. For a discussion of Available Cash
from Operating Surplus available for distributions with respect to the Common
Units on a pro forma basis, see "Cash Available for Distribution."
 
QUARTERLY DISTRIBUTIONS OF AVAILABLE CASH
 
    The Partnership will make distributions to its partners with respect to each
quarter of the Partnership prior to its liquidation in an amount equal to 100%
of its Available Cash for such quarter. The Partnership expects to make
distributions of all Available Cash within 45 days after the end of each quarter
to holders of record on the applicable record date. The Minimum Quarterly
Distribution and the Target Distribution Levels are also subject to certain
other adjustments as described below under "--Distributions from Capital
Surplus" and "--Adjustment of Minimum Quarterly Distribution and Target
Distribution Levels."
 
                                       37
<PAGE>
    With respect to each quarter during the Subordination Period, to the extent
there is sufficient Available Cash, the holders of Common Units will have the
right to receive the Minimum Quarterly Distribution, plus any Common Unit
Arrearages, prior to any distribution of Available Cash to the holders of
Subordinated Units. This subordination feature will enhance the Partnership's
ability to distribute the Minimum Quarterly Distribution on the Common Units
during the Subordination Period. There is no guarantee, however, that the
Minimum Quarterly Distribution will be made on the Common Units. Upon expiration
of the Subordination Period, all Subordinated Units will be converted on a
one-for-one basis into Common Units and will participate pro rata with all other
Common Units in future distributions of Available Cash. Under certain
circumstances, up to 1,649,405 Subordinated Units may convert into Common Units
prior to the expiration of the Subordination Period. Common Units will not
accrue arrearages with respect to distributions for any quarter after the
Subordination Period and Subordinated Units will not accrue any arrearages with
respect to distributions for any quarter.
 
DISTRIBUTIONS FROM OPERATING SURPLUS DURING SUBORDINATION PERIOD
 
    The Subordination Period will generally extend until the first day of any
quarter beginning after December 31, 2001 in respect of which (i) distributions
of Available Cash from Operating Surplus on the Common Units and the
Subordinated Units with respect to each of the three consecutive four-quarter
periods immediately preceding such date equaled or exceeded the sum of the
Minimum Quarterly Distribution on all of the outstanding Common Units and
Subordinated Units during such periods, (ii) the Adjusted Operating Surplus
generated during each of the three consecutive four-quarter periods immediately
preceding such date equaled or exceeded the sum of the Minimum Quarterly
Distribution on all of the outstanding Common Units and Subordinated Units and
the related distribution on the general partner interests in the Partnership
during such periods, and (iii) there are no outstanding Common Unit Arrearages.
 
    Prior to the end of the Subordination Period, one quarter of the
Subordinated Units (1,649,405 Subordinated Units) will convert into Common Units
on a one-for-one basis on the first day after the record date established for
the distribution in respect of any quarter ending on or after December 31, 2000
in respect of which (i) distributions of Available Cash from Operating Surplus
on the Common Units and the Subordinated Units with respect to each of the three
consecutive four-quarter periods immediately preceding such date equaled or
exceeded the sum of the Minimum Quarterly Distribution on all of the outstanding
Common Units and Subordinated Units during such periods, (ii) the Adjusted
Operating Surplus generated during each of the two consecutive four-quarter
periods immediately preceding such date equaled or exceeded the sum of the
Minimum Quarterly Distribution on all of the outstanding Common Units and
Subordinated Units and the related distribution on the general partner interests
in the Partnership during such periods, and (iii) there are no outstanding
Common Unit Arrearages.
 
    Upon expiration of the Subordination Period, all remaining Subordinated
Units will convert into Common Units on a one-for-one basis and will thereafter
participate, pro rata, with the other Common Units in distributions of Available
Cash. In addition, if the Managing General Partner is removed as managing
general partner of the Partnership under circumstances where Cause does not
exist and Units held by the Managing General Partner and its affiliates are not
voted in favor of such removal, (i) the Subordination Period will end and all
outstanding Subordinated Units will immediately convert into Common Units on a
one-for-one basis, (ii) any existing Common Unit Arrearages will be extinguished
and (iii) the General Partners will have the right to convert their general
partner interests (and the rights of each of them to receive Incentive
Distributions) into Common Units or to receive cash in exchange for such
interests.
 
    "Adjusted Operating Surplus" for any period generally means Operating
Surplus generated during such period, less (a) any net increase in working
capital borrowings during such period and (b) any net reduction in cash reserves
for Operating Expenditures during such period not relating to an Operating
Expenditure made during such period; and plus (x) any net decrease in working
capital borrowings during
 
                                       38
<PAGE>
such period and (y) any net increase in cash reserves for Operating Expenditures
during such period required by any debt instrument for the repayment of
principal, interest or premium. Operating Surplus generated during a period is
equal to the difference between (i) the Operating Surplus determined at the end
of such period and (ii) the Operating Surplus determined at the beginning of
such period.
 
    Distributions by the Partnership of Available Cash from Operating Surplus
with respect to any quarter during the Subordination Period will be made in the
following manner:
 
        FIRST, 98% to the Common Unitholders, pro rata, and 2% to the General
    Partners, until there has been distributed in respect of each outstanding
    Common Unit an amount equal to the Minimum Quarterly Distribution for such
    quarter;
 
        SECOND, 98% to the Common Unitholders, pro rata, and 2% to the General
    Partners, until there has been distributed in respect of each outstanding
    Common Unit an amount equal to any Common Unit Arrearages accrued and unpaid
    with respect to any prior quarters during the Subordination Period;
 
        THIRD, 98% to the Subordinated Unitholders, pro rata, and 2% to the
    General Partners, until there has been distributed in respect of each
    outstanding Subordinated Unit an amount equal to the Minimum Quarterly
    Distribution for such quarter; and
 
        THEREAFTER, in the manner described in "--Incentive
    Distributions--Hypothetical Annualized Yield" below.
 
    The above references to the 2% of Available Cash from Operating Surplus
distributed to the General Partners are references to the amount of the
percentage interest in distributions from the Partnership and the Operating
Partnership of the General Partners on a combined basis (exclusive of their
interest as holders of the Subordinated Units). The General Partners own a
combined 1% general partner interest in the Partnership and a combined 1.0101%
general partner interest in the Operating Partnership. Other references in this
Prospectus to the General Partners' 2% interest or to distributions of 2% of
Available Cash are also references to the amount of the combined percentage
interest in the Partnership and the Operating Partnership of the General
Partners (exclusive of their interest as holders of the Subordinated Units).
With respect to any Common Unit, the term "Common Unit Arrearages" refers to the
amount by which the Minimum Quarterly Distribution in any quarter during the
Subordination Period exceeds the distribution of Available Cash from Operating
Surplus actually made for such quarter on a Common Unit, cumulative for such
quarter and all prior quarters during the Subordination Period. Common Unit
Arrearages will not accrue interest.
 
DISTRIBUTIONS FROM OPERATING SURPLUS AFTER SUBORDINATION PERIOD
 
    Distributions by the Partnership of Available Cash from Operating Surplus
with respect to any quarter after the Subordination Period will be made in the
following manner:
 
        FIRST, 98% to all Unitholders, pro rata, and 2% to the General
    Partners, until there has been distributed in respect of each Unit an
    amount equal to the Minimum Quarterly Distribution for such quarter; and
 
        THEREAFTER, in the manner described in "--Incentive
    Distribution--Hypothetical Annualized Yield" below.
 
                                       39
<PAGE>
INCENTIVE DISTRIBUTIONS--HYPOTHETICAL ANNUALIZED YIELD
 
    For any quarter for which Available Cash from Operating Surplus is
distributed to the Common and Subordinated Unitholders in an amount equal to the
Minimum Quarterly Distribution on all Units and to the Common Unitholders in an
amount equal to any unpaid Common Unit Arrearages, then any additional Available
Cash from Operating Surplus in respect of such quarter will be distributed among
the Unitholders and the General Partners in the following manner:
 
        FIRST, 98% to all Unitholders, pro rata, and 2% to the General
    Partners, until the Unitholders have received (in addition to any
    distributions to Common Unitholders to eliminate Common Unit Arrearages)
    a total of $0.594 for such quarter in respect of each outstanding Unit
    (the "First Target Distribution");
 
        SECOND, 85% to all Unitholders, pro rata, and 15% to the General
    Partners, until the Unitholders have received (in addition to any
    distributions to Common Unitholders to eliminate Common Unit Arrearages)
    a total of $0.700 for such quarter in respect of each outstanding Unit
    (the "Second Target Distribution");
 
        THIRD, 75% to all Unitholders, pro rata, and 25% to the General
    Partners, until the Unitholders have received (in addition to any
    distributions to Common Unitholders to eliminate Common Unit Arrearages)
    a total of $0.900 for such quarter in respect of each outstanding Unit
    (the "Third Target Distribution"); and
 
        THEREAFTER, 50% to all Unitholders, pro rata, and 50% to the General
    Partners.
 
    The distributions to the General Partners set forth above (other than in
their capacity as holders of the Subordinated Units) that are in excess of their
aggregate 2% general partner interest represent the Incentive Distributions. The
right to receive Incentive Distributions is not part of the general partner
interest and may be transferred separately from such interests. See "The
Partnership Agreement--Transfer of General Partners' Interests and Incentive
Distribution Rights."
 
    The following table illustrates the percentage allocation of the additional
Available Cash from Operating Surplus between the Unitholders and the General
Partners up to the various Target Distribution Levels and a hypothetical
annualized percentage yield to be realized by a Unitholder at each Target
Distribution Level. For purposes of the following table, the annualized
percentage yield is calculated on a pretax basis assuming that (i) the Common
Unit was issued for a capital contribution of $21.00 per Common Unit (equal to
the initial public offering price) and (ii) the Partnership distributed each
quarter during the first year following the investment the amount set forth
under the column "Total Quarterly Distribution Target Amount." The calculations
are also based on the assumption that the quarterly distribution amounts shown
do not include any Common Unit Arrearages. The amounts set forth under "Marginal
Percentage Interest in Distributions" are the percentage interests of the
General Partners and the Unitholders in any Available Cash from Operating
Surplus distributed up to and including the corresponding amount in the column
"Total Quarterly Distribution Target Amount," until Available Cash distributed
reaches the next Target Distribution Level, if any. The percentage interests
shown for the Unitholders and the General Partners for the Minimum Quarterly
Distribution are also applicable to quarterly distribution amounts that are less
than the Minimum Quarterly Distribution
 
<TABLE>
<CAPTION>
                                                                                               MARGINAL PERCENTAGE
                                                                                            INTEREST IN DISTRIBUTIONS
                                                   TOTAL QUARTERLY                          --------------------------
                                                 DISTRIBUTION TARGET       HYPOTHETICAL                      GENERAL
                                                       AMOUNT            ANNUALIZED YIELD    UNITHOLDERS    PARTNERS
                                              -------------------------  -----------------  -------------  -----------
<S>                                           <C>                        <C>                <C>            <C>
Minimum Quarterly Distribution..............           $0.540                 10.286%            98%           2%
First Target Distribution...................           $0.594                 11.314%            98%           2%
Second Target Distribution..................           $0.700                 13.333%            85%           15%
Third Target Distribution...................           $0.900                 17.143%            75%           25%
Thereafter..................................        above $0.900           above 17.143%         50%           50%
</TABLE>
 
                                       40
<PAGE>
DISTRIBUTIONS FROM CAPITAL SURPLUS
 
    Distributions by the Partnership of Available Cash from Capital Surplus will
be made in the following manner:
 
        FIRST, 98% to all Unitholders, pro rata, and 2% to the General
    Partners, until the Partnership has distributed, in respect of each
    outstanding Common Unit issued in the IPO, with the Available Cash from
    Capital Surplus in an aggregate amount per Common Unit equal to the
    Initial Unit Price;
 
        SECOND, 98% to the holders of Common Units, pro rata, and 2% to the
    General Partners, until the Partnership has distributed, in respect of
    each outstanding Common Unit, Available Cash from Capital Surplus in an
    aggregate amount equal to any unpaid Common Unit Arrearages with respect
    to such Common Unit; and
 
        THEREAFTER, all distributions of Available Cash from Capital Surplus
    will be distributed as if they were from Operating Surplus.
 
    As a distribution of Available Cash from Capital Surplus is made, it is
treated as if it were a repayment of the Initial Unit Price with respect to
Common Units issued in the IPO--it is a "return of capital" rather than a
"return on capital." To reflect such repayment, the Minimum Quarterly
Distribution and the Target Distribution Levels will be adjusted downward by
multiplying each such amount by a fraction, the numerator of which is the
Unrecovered Capital of the Common Units immediately after giving effect to such
repayment and the denominator of which is the Unrecovered Capital of the Common
Units immediately prior to such repayment. This adjustment to the Minimum
Quarterly Distribution may make it more likely that Subordinated Units will be
converted into Common Units (whether pursuant to the termination of the
Subordination Period or to the provisions permitting early conversion of some
Subordinated Units) and may accelerate the dates at which such conversions
occur.
 
    When "payback" of the Initial Unit Price has occurred, i.e., when the
Unrecovered Capital of the Common Units is zero (and any accrued Common Unit
Arrearages have been paid), then in effect the Minimum Quarterly Distribution
and each of the Target Distribution Levels will have been reduced to zero for
subsequent quarters. Thereafter, all distributions of Available Cash from all
sources will be treated as if they were from Operating Surplus. Because the
Minimum Quarterly Distribution and the Target Distribution Levels will have been
reduced to zero, the General Partners will be entitled thereafter to receive 50%
of all distributions of Available Cash in their capacities as General Partners
and as holders of the Incentive Distribution Rights (in addition to any
distributions to which they may be entitled as holders of Units).
 
    Distributions of Available Cash from Capital Surplus will not reduce the
Minimum Quarterly Distribution or Target Distribution Levels for the quarter
with respect to which they are distributed.
 
ADJUSTMENT OF MINIMUM QUARTERLY DISTRIBUTION AND TARGET DISTRIBUTION LEVELS
 
    In addition to reductions of the Minimum Quarterly Distribution and Target
Distribution Levels made upon a distribution of Available Cash from Capital
Surplus, the Minimum Quarterly Distribution, the Target Distribution Levels, the
Unrecovered Capital, the number of additional Common Units issuable during the
Subordination Period without a Unitholder vote, the number of Common Units
issuable upon conversion of the Subordinated Units and other amounts calculated
on a per Unit basis will be proportionately adjusted upward or downward, as
appropriate, in the event of any combination or subdivision of Common Units
(whether effected by a distribution payable in Common Units or otherwise), but
not by reason of the issuance of additional Common Units for cash or property.
For example, in the event of a two-for-one split of the Common Units (assuming
no prior adjustments), the Minimum Quarterly Distribution, each of the Target
Distribution Levels and the Unrecovered Capital of the Common Units would each
be reduced to 50% of its initial level.
 
                                       41
<PAGE>
    The Minimum Quarterly Distribution and the Target Distribution Levels may
also be adjusted if legislation is enacted or if existing law is modified or
interpreted by the relevant governmental authority in a manner that causes the
Partnership to become taxable as a corporation or otherwise subjects the
Partnership to taxation as an entity for federal, state or local income tax
purposes. In such event, the Minimum Quarterly Distribution and the Target
Distribution Levels would be reduced to an amount equal to the product of (i)
the Minimum Quarterly Distribution and each of the Target Distribution Levels,
respectively, multiplied by (ii) one minus the sum of (x) the maximum effective
federal income tax rate to which the Partnership is then subject as an entity
plus (y) any increase that results from such legislation in the effective
overall state and local income tax rate to which the Partnership is subject as
an entity for the taxable year in which such event occurs (after taking into
account the benefit of any deduction allowable for federal income tax purposes
with respect to the payment of state and local income taxes). For example,
assuming the Partnership was not previously subject to state and local income
tax, if the Partnership were to become taxable as an entity for federal income
tax purposes and the Partnership became subject to a maximum marginal federal,
and effective state and local, income tax rate of 38%, then the Minimum
Quarterly Distribution and the Target Distribution Levels would each be reduced
to 62% of the amount thereof immediately prior to such adjustment.
 
DISTRIBUTIONS OF CASH UPON LIQUIDATION
 
    Following the commencement of the dissolution and liquidation of the
Partnership, assets will be sold or otherwise disposed of from time to time and
the partners' capital account balances will be adjusted to reflect any resulting
gain or loss. The proceeds of such liquidation will, first, be applied to the
payment of creditors of the Partnership in the order of priority provided in the
Partnership Agreement and by law and, thereafter, be distributed to the
Unitholders and the General Partners in accordance with their respective capital
account balances as so adjusted.
 
    Partners are entitled to liquidating distributions in accordance with
capital account balances. The allocations of gains and losses upon liquidation
are intended, to the extent possible, to entitle the holders of outstanding
Common Units to a preference over the holders of outstanding Subordinated Units
upon the liquidation of the Partnership, to the extent required to permit Common
Unitholders to receive their Unrecovered Capital plus any unpaid Common Unit
Arrearages. Thus, net losses recognized upon liquidation of the Partnership will
be allocated to the holders of the Subordinated Units to the extent of their
capital account balances before any loss is allocated to the holders of the
Common Units, and net gains recognized upon liquidation will be allocated first
to restore negative balances in the capital account of the General Partners and
any Unitholders and then to the Common Unitholders until their capital account
balances equal their Unrecovered Capital plus unpaid Common Unit Arrearages.
However, no assurance can be given that there will be sufficient gain upon
liquidation of the Partnership to enable the holders of Common Units to fully
recover all of such amounts, even though there may be cash available for
distribution to the holders of Subordinated Units.
 
    The manner of such adjustment is as provided in the Partnership Agreement,
which is an exhibit to the Registration Statement of which this Prospectus is a
part. If the liquidation of the Partnership occurs before the end of the
Subordination Period, any net gain (or unrealized gain attributable to assets
distributed in kind) will be allocated to the partners as follows:
 
        FIRST, to the General Partners and the holders of Units having
    negative balances in their capital accounts to the extent of and in
    proportion to such negative balances;
 
        SECOND, 98% to the holders of Common Units, pro rata, and 2% to the
    General Partners, until the capital account for each Common Unit is
    equal to the sum of (i) the Unrecovered Capital in respect of such
    Common Unit, (ii) the amount of the Minimum Quarterly Distribution for
    the quarter during which liquidation of the Partnership occurs and (iii)
    any unpaid Common Unit Arrearages in respect of such Common Unit;
 
                                       42
<PAGE>
        THIRD, 98% to the holders of Subordinated Units, pro rata, and 2% to
    the General Partners, until the capital account for each Subordinated
    Unit is equal to the sum of (i) the Unrecovered Capital in respect of
    such Subordinated Unit and (ii) the amount of the Minimum Quarterly
    Distribution for the quarter during which the liquidation of the
    Partnership occurs;
 
        FOURTH, 98% to all Unitholders, pro rata, and 2% to the General
    Partners, until there has been allocated under this paragraph fourth an
    amount per Unit equal to (a) the sum of the excess of the First Target
    Distribution per Unit over the Minimum Quarterly Distribution per Unit
    for each quarter of the Partnership's existence, less (b) the cumulative
    amount per Unit of any distributions of Available Cash from Operating
    Surplus in excess of the Minimum Quarterly Distribution per Unit that
    were distributed 98% to the Unitholders, pro rata, and 2% to the General
    Partners for each quarter of the Partnership's existence;
 
        FIFTH, 85% to the Unitholders, pro rata, and 15% to the General
    Partners, until there has been allocated under this paragraph fifth an
    amount per Unit equal to (a) the sum of the excess of the Second Target
    Distribution per Unit over the First Target Distribution per Unit for
    each quarter of the Partnership's existence, less (b) the cumulative
    amount per Unit of any distributions of Available Cash from Operating
    Surplus in excess of the First Target Distribution per Unit that were
    distributed 85% to the Unitholders, pro rata, and 15% to the General
    Partners for each quarter of the Partnership's existence;
 
        SIXTH, 75% to all Unitholders, pro rata, and 25% to the General
    Partners, until there has been allocated under this paragraph sixth an
    amount per Unit equal to (a) the sum of the excess of the Third Target
    Distribution per Unit over the Second Target Distribution per Unit for
    each quarter of the Partnership's existence, less (b) the cumulative
    amount per Unit of any distributions of Available Cash from Operating
    Surplus in excess of the Second Target Distribution per Unit that were
    distributed 75% to the Unitholders, pro rata, and 25% to the General
    Partners for each quarter of the Partnership's existence; and
 
        THEREAFTER, 50% to all Unitholders, pro rata, and 50% to the General
    Partners.
 
    If the liquidation occurs after the Subordination Period, the distinction
between Common Units and Subordinated Units will disappear, so that clauses (ii)
and (iii) of paragraph SECOND above and all of paragraph THIRD above will no
longer be applicable.
 
    Upon liquidation of the Partnership, any loss will generally be allocated to
the General Partners and the Unitholders as follows:
 
        FIRST, 98% to holders of Subordinated Units in proportion to the
    positive balances in their respective capital accounts and 2% to the
    General Partners, until the capital accounts of the holders of the
    Subordinated Units have been reduced to zero;
 
        SECOND, 98% to the holders of Common Units in proportion to the
    positive balances in their respective capital accounts and 2% to the
    General Partners, until the capital accounts of the Common Unitholders
    have been reduced to zero; and
 
        THEREAFTER, 100% to the General Partners.
 
    If the liquidation occurs after the Subordination Period, the distinction
between Common Units and Subordinated Units will disappear, so that all of
paragraph FIRST above will no longer be applicable.
 
    Any allocation made to the General Partners herein shall be made to the
General Partners pro rata in accordance with their respective general partner
interests. In addition, interim adjustments to capital accounts will be made at
the time the Partnership issues additional interests in the Partnership or makes
distributions of property. Such adjustments will be based on the fair market
value of the interests or the property distributed and any gain or loss
resulting therefrom will be allocated to the Unitholders and the
 
                                       43
<PAGE>
General Partners in the same manner as gain or loss is allocated upon
liquidation. In the event that positive interim adjustments are made to the
capital accounts, any subsequent negative adjustments to the capital accounts
resulting from the issuance of additional interests in the Partnership,
distributions of property by the Partnership, or upon liquidation of the
Partnership, will be allocated in a manner which results, to the extent
possible, in the capital account balances of the General Partners equaling the
amount which would have been the General Partners' capital account balances if
no prior positive adjustments to the capital accounts had been made.
 
                        CASH AVAILABLE FOR DISTRIBUTION
 
    The amount of Available Cash from Operating Surplus needed to distribute the
Minimum Quarterly Distribution of $.54 per Common Unit per quarter for four
quarters on the Common Units and Subordinated Units outstanding as of the date
of this Prospectus and on the aggregate 2% general partner interest of the
General Partners is approximately $43.7 million ($28.6 million for the Common
Units, $14.2 million for the Subordinated Units and $874,000 for the aggregate
2% general partner interest of the General Partners). The amount of pro forma
Available Cash from Operating Surplus generated during fiscal 1997 was
approximately $22.3 million (including approximately $2.9 million of Available
Cash from Operating Surplus of businesses acquired in May and June, 1997 but not
reflecting Available Cash from Operating Surplus of businesses acquired
subsequent to June 30, 1997). Such amount would have been insufficient by
approximately $6.9 million to cover the full Minimum Quarterly Distribution for
such fiscal year on all of the Common Units currently outstanding and the
related distribution on the general partner interests, and would have been
insufficient by approximately $21.4 million to cover the Minimum Quarterly
Distribution on all Subordinated Units currently outstanding and the related
distribution on the general partner interests. The Partnership elected not to
pay the Minimum Quarterly Distribution with respect to the Subordinated Units
for the quarters ended December 31, 1997 and March 31 and June 30, 1998. See
"Risk Factors--Risks Inherent in an Investment in the Partnership--Cash
Distributions Are Not Guaranteed and May Fluctuate with Partnership
Performance."
 
                                       44
<PAGE>
                PRO FORMA AVAILABLE CASH FROM OPERATING SURPLUS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                                        FISCAL YEAR
                                                                                                           ENDED
                                                                                                         JUNE 30,
                                                                                                           1997
                                                                                                        -----------
<S>                                                                                                     <C>
Pro forma operating income(a).........................................................................   $  25,968
Add: Pro forma depreciation and amortization..........................................................      15,073
                                                                                                        -----------
Pro forma EBITDA(a)(b)................................................................................      41,041
Less: Pro forma interest expense......................................................................      18,215
  Pro forma capital expenditures--maintenance(c)......................................................       3,500
                                                                                                        -----------
Pro forma Available Cash from Operating Surplus before acquisitions(a)(d).............................      19,326
Available Cash from Operating Surplus of businesses acquired in May and June, 1997(e).................       2,951
                                                                                                        -----------
Pro Forma Available Cash from Operating Surplus(a)(d).................................................   $  22,277
                                                                                                        -----------
                                                                                                        -----------
</TABLE>
 
- ------------------------
 
(a) The pro forma amounts of operating income, EBITDA and Available Cash from
    Operating Surplus do not reflect (i) savings of certain non-recurring
    expenses incurred by Empire Energy, (ii) propane acquisition and logistics
    costs savings and (iii) insurance savings that the Partnership believes are
    achievable as a result of the Transactions.
 
(b) EBITDA consists of net income before depreciation, amortization, interest
    and income taxes. EBITDA should not be considered as an alternative to net
    income (as an indicator of operating performance) or as an alternative to
    cash flow, and it is not a measure of performance or financial condition
    under generally accepted accounting principles, but it provides additional
    information for evaluating the Partnership's ability to distribute the
    Minimum Quarterly Distribution and to service and incur indebtedness. Cash
    flows in accordance with generally accepted accounting principles consist of
    cash flows from operating, investing and financing activities; cash flows
    from operating activities reflect net income (including charges for interest
    and income taxes, which are not reflected in EBITDA), adjusted for noncash
    charges or income (which are reflected in EBITDA) and changes in operating
    assets and liabilities (which are not reflected in EBITDA). Further, cash
    flows from investing and financing activities are not included in EBITDA.
 
(c) Based upon estimated maintenance capital expenditures for fiscal 1998.
 
(d) Available Cash from Operating Surplus generated during a specified period
    refers generally to (i) all cash receipts of the Partnership from its
    operations generated during such period, less (ii) all Partnership operating
    expenses, debt service payments (including any increases in reserves
    therefor but not including amounts paid from any reduction in reserves, or
    payments required in connection with the sale of assets, or any refinancing
    with the proceeds of new indebtedness or an equity offering) and maintenance
    capital expenditures, in each case during such period. For a complete
    definition of Operating Surplus, see the Glossary.
 
(e) Reflects Available Cash from Operating Surplus of businesses acquired in May
    and June, 1997 as if they had been acquired July 1, 1996.
 
    The amount of pro forma Available Cash from Operating Surplus for fiscal
1997 set forth above was derived from the pro forma consolidated financial
statements of the Partnership. The pro forma adjustments are based upon
currently available information and certain estimates and assumptions. The pro
forma consolidated financial statements do not purport to present the results of
operations of the Partnership had the Transactions actually been completed as of
the dates indicated. Furthermore, the pro forma consolidated financial
statements are based on accrual accounting concepts while Operating Surplus is
defined in the Partnership Agreement on a cash accounting basis. As a
consequence, the amount of
 
                                       45
<PAGE>
pro forma Available Cash from Operating Surplus shown above should only be
viewed as a general indication of the amount of Available Cash from Operating
Surplus that might in fact have been generated by the Partnership had it been
formed in earlier periods.
 
    The Partnership is required to establish reserves for the future payment of
principal and interest on the Notes and the indebtedness under the Bank Credit
Facility. See "Risk Factors--Risks Inherent in an Investment in the
Partnership--Cash Distributions Are Not Guaranteed and May Fluctuate with
Partnership Performance." There are other provisions in such agreements which
will, under certain circumstances, restrict the Partnership's ability to make
distributions to its partners. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations--Liquidity and Capital
Resources--Financing and Sources of Liquidity."
 
                           THE PARTNERSHIP AGREEMENT
 
    The following paragraphs are a summary of the material provisions of the
Partnership Agreement. The Partnership Agreement for the Partnership and the
Partnership Agreement for the Operating Partnership (the "Operating Partnership
Agreement") are exhibits to the Registration Statement of which this Prospectus
constitutes a part. The Partnership will provide prospective investors with a
copy of the Partnership Agreement and the Operating Partnership Agreement upon
request at no charge. The discussions presented herein and below of the material
provisions of the Partnership Agreement are qualified in their entirety by
reference to the Partnership Agreements for the Partnership and for the
Operating Partnership. The Partnership is the sole limited partner of the
Operating Partnership, which owns, manages and operates the Partnership's
business. The General Partners serve as the general partners of the Partnership
and of the Operating Partnership, owning an aggregate 2% general partner
interest in the Partnership and the Operating Partnership on a combined basis.
The Managing General Partner manages and operates the Partnership, and the
Special General Partner has no duty or right to participate in the management or
operation of the Partnership. Unless the context otherwise requires, references
herein to the "Partnership Agreement" constitute references to the Partnership
Agreement and the Operating Partnership Agreement, collectively.
 
    Certain provisions of the Partnership Agreement are summarized elsewhere in
this Prospectus under various headings. With regard to the transfer of Common
Units, see "Description of the Common Units-- Transfer of Common Units." With
regard to distributions of Available Cash, see "Cash Distribution Policy." With
regard to allocations of taxable income and taxable loss, see "Tax
Considerations." Persons considering acquiring Common Units are urged to review
these sections of this Prospectus and the Partnership Agreement carefully.
 
ORGANIZATION AND DURATION
 
    The Partnership and the Operating Partnership were organized in October 1996
and November 1996, respectively, as Delaware limited partnerships. The General
Partners are the general partners of the Partnership and the Operating
Partnership. The General Partners own an aggregate 2% interest as general
partners and the right to receive Incentive Distributions, and the Unitholders
(including the General Partners as holders of Subordinated Units) own a 98%
interest as limited partners, in the Partnership and the Operating Partnership
on a combined basis. The Partnership will dissolve on December 31, 2086, unless
sooner dissolved pursuant to the terms of the Partnership Agreement.
 
PURPOSE
 
    The purpose of the Partnership under the Partnership Agreement is limited to
serving as the limited partner of the Operating Partnership and engaging in any
business activity that may be engaged in by the Operating Partnership. The
Operating Partnership Agreement provides that the Operating Partnership may,
directly or indirectly, engage in (i) the Combined Operations as conducted
immediately prior to the
 
                                       46
<PAGE>
IPO, (ii) any other activity approved by the Managing General Partner but only
to the extent that the Managing General Partner reasonably determines that, as
of the date of the acquisition or commencement of such activity, such activity
generates "qualifying income" (as such term is defined in Section 7704 of the
Code) or (iii) any activity that enhances the operations of an activity that is
described in (i) or (ii) above. Although the Managing General Partner has the
ability under the Partnership Agreement to cause the Partnership and the
Operating Partnership to engage in activities other than propane marketing and
related businesses, the Managing General Partner has no current intention of
doing so. The Managing General Partner is authorized in general to perform all
acts deemed necessary to carry out such purposes and to conduct the business of
the Partnership.
 
POWER OF ATTORNEY
 
    Each Limited Partner, and each person who acquires a Unit from a Unitholder
and executes and delivers a transfer application with respect thereto, grants to
the Managing General Partner and, if a liquidator of the Partnership has been
appointed, such liquidator, a power of attorney to, among other things, execute
and file certain documents required in connection with the qualification,
continuance or dissolution of the Partnership or the amendment of the
Partnership Agreement in accordance with the terms thereof and to make consents
and waivers contained in the Partnership Agreement.
 
CAPITAL CONTRIBUTIONS
 
    The Unitholders are not obligated to make additional capital contributions
to the Partnership, except as described below under "--Limited Liability."
 
LIMITED LIABILITY
 
    Assuming that a Limited Partner does not participate in the control of the
business of the Partnership within the meaning of the Delaware Act and that he
otherwise acts in conformity with the provisions of the Partnership Agreement,
his liability under the Delaware Act will be limited, subject to certain
possible exceptions, to the amount of capital he is obligated to contribute to
the Partnership in respect of his Common Units plus his share of any
undistributed profits and assets of the Partnership. If it were determined,
however, that the right or exercise of the right by the Limited Partners as a
group to remove or replace the General Partners, to approve certain amendments
to the Partnership Agreement or to take other action pursuant to the Partnership
Agreement constituted "participation in the control" of the Partnership's
business for the purposes of the Delaware Act, then a Limited Partner could be
held personally liable for the Partnership's obligations under the laws of the
State of Delaware to the same extent as the General Partners with respect to
persons who transact business with the Partnership reasonably believing, based
on the Limited Partner's conduct, that the Limited Partner is a general partner.
 
    Under the Delaware Act, a limited partnership may not make a distribution to
a partner to the extent that at the time of the distribution, after giving
effect to the distribution, all liabilities of the partnership, other than
liabilities to partners on account of their partnership interests and
liabilities for which the recourse of creditors is limited to specific property
of the partnership, exceed the fair value of the assets of the limited
partnership. For the purpose of determining the fair value of the assets of a
limited partnership, the Delaware Act provides that the fair value of property
subject to liability for which recourse of creditors is limited shall be
included in the assets of the limited partnership only to the extent that the
fair value of that property exceeds that nonrecourse liability. The Delaware Act
provides that a limited partner who receives such a distribution and knew at the
time of the distribution that the distribution was in violation of the Delaware
Act shall be liable to the limited partnership for the amount of the
distribution for three years from the date of the distribution. Under the
Delaware Act, an assignee who becomes a substituted limited partner of a limited
partnership is liable for the obligations of his assignor to make contributions
to the partnership, except the assignee is not obligated for liabilities unknown
to him at the time he became a limited partner and which could not be
ascertained from the partnership agreement.
 
                                       47
<PAGE>
    The Operating Partnership currently conducts business in at least 27 states.
Maintenance of limited liability may require compliance with legal requirements
in such jurisdictions in which the Operating Partnership conducts business,
including qualifying the Operating Partnership to do business there. Limitations
on the liability of limited partners for the obligations of a limited
partnership have not been clearly established in many jurisdictions. If it were
determined that the Partnership was, by virtue of its limited partner interest
in the Operating Partnership or otherwise, conducting business in any state
without compliance with the applicable limited partnership statute, or that the
right or exercise of the right by the Limited Partners as a group to remove or
replace the General Partners, to approve certain amendments to the Partnership
Agreement, or to take other action pursuant to the Partnership Agreement
constituted "participation in the control" of the Partnership's business for the
purposes of the statutes of any relevant jurisdiction, then the Limited Partners
could be held personally liable for the Partnership's obligations under the law
of such jurisdiction to the same extent as the General Partners under certain
circumstances. The Partnership will operate in such manner as the Managing
General Partner deems reasonable and necessary or appropriate to preserve the
limited liability of the Limited Partners.
 
ISSUANCE OF ADDITIONAL SECURITIES
 
    The Partnership Agreement authorizes the Partnership to issue an unlimited
number of additional limited partner interests and other equity securities of
the Partnership for such consideration and on such terms and conditions as are
established by the Managing General Partner in its sole discretion without the
approval of any limited partners; provided that, during the Subordination
Period, except as provided in clauses (i) and (ii) below, the Partnership may
not issue equity securities of the Partnership ranking prior or senior to the
Common Units or an aggregate of more than 4,270,000 additional Common Units
(excluding Common Units issued upon conversion of Subordinated Units, upon
conversion of the general partner interests and Incentive Distribution Rights as
a result of a withdrawal of a General Partner, and pursuant to the employee
benefit plans of the Managing General Partner, the Partnership or other members
of the Partnership Group and subject to adjustment in the event of a combination
or subdivision of Common Units) or an equivalent number of securities ranking on
a parity with the Common Units without the approval of the holders of at least a
Unit Majority. During the Subordination Period, the Partnership may also issue
an unlimited number of additional Common Units or parity securities without the
approval of the Unitholders (i) if such issuance occurs (A) in connection with
an Acquisition or a Capital Improvement or (B) within 365 days of, and the net
proceeds from such issuance are used to repay debt incurred in connection with,
an Acquisition or a Capital Improvement, in each case where such Acquisition or
Capital Improvement involves assets that, if acquired by the Partnership as of
the date that is one year prior to the first day of the quarter in which such
transaction is to be effected, would have resulted in an increase in (1) the
amount of Adjusted Operating Surplus generated by the Partnership on a per-Unit
basis (for all outstanding Units) with respect to each of the four most recently
completed quarters (on a pro forma basis) as compared to (2) the actual amount
of Adjusted Operating Surplus generated by the Partnership on a per-Unit basis
(for all outstanding Units) (excluding Adjusted Operating Surplus attributable
to the Acquisition or Capital Improvement) with respect to each of such four
most recently completed quarters (provided that if the issuance of Units with
respect to an Acquisition or Capital Improvement occurs within the first four
full quarters after the closing of the IPO, then Adjusted Operating Surplus as
used in clauses (1) (determined on a pro forma basis) and (2) above will be
calculated (A) for each quarter, if any, that commenced after the closing of the
IPO for which actual results of operations are available, based on the actual
Adjusted Operating Surplus of the Partnership generated with respect to such
quarter and (B) for each other quarter, on a pro forma basis not inconsistent
with the procedures, as applicable, set forth in "Cash Available for
Distribution" (which Units may include all or a portion of the Common Units
offered hereby); or (ii) if the proceeds from such issuance are used exclusively
to repay up to $75.0 million in indebtedness of a member of the Partnership
Group, in each case only where the aggregate amount of distributions that would
have been paid with respect to such newly issued Units and the related
additional distributions that would have been made to
 
                                       48
<PAGE>
the General Partners in respect of the (actual or pro forma) four-quarter period
ending prior to the first day of the quarter in which the issuance is to be
consummated (assuming such additional Units had been outstanding throughout such
period and that distributions equal to the distributions that were actually paid
on the outstanding Units during the period were paid on such additional Units)
did not exceed the interest costs actually incurred during such period on the
indebtedness that is to be repaid (or, if such indebtedness was not outstanding
throughout the entire period, would have been incurred had such indebtedness
been outstanding for the entire period). In accordance with Delaware law and the
provisions of the Partnership Agreement, the Partnership may also issue
additional partnership interests that, in the sole discretion of the Managing
General Partner, may have special voting rights to which the Common Units are
not entitled.
 
    Upon issuance of additional Partnership Securities, the General Partners
will be required to make additional capital contributions to the extent
necessary to maintain their 2% general partner interest in the Partnership and
the Operating Partnership. Moreover, the Managing General Partner will have the
right, which it may from time to time assign in whole or in part to any of its
affiliates, to purchase Common Units, Subordinated Units or other equity
securities of the Partnership from the Partnership whenever, and on the same
terms that, the Partnership issues such securities or rights to persons other
than the Managing General Partner and its affiliates, to the extent necessary to
maintain the percentage interest of the General Partners and their affiliates in
the Partnership (including their interest represented by Subordinated Units)
that existed immediately prior to each such issuance. The holders of Common
Units do not have preemptive rights to acquire additional Common Units or other
partnership interests that may be issued by the Partnership.
 
AMENDMENT OF PARTNERSHIP AGREEMENT
 
    Amendments to the Partnership Agreement may be proposed only by or with the
consent of the Managing General Partner, which consent may be given or withheld
in its sole discretion. In order to adopt a proposed amendment (other than
certain amendments discussed below), the Managing General Partner is required to
seek written approval of the holders of the number of Units required to approve
such amendment or call a meeting of the Limited Partners to consider and vote
upon the proposed amendment, except as described below. Proposed amendments
(unless otherwise specified) must be approved by holders of a Unit Majority,
except that no amendment may be made which would (i) enlarge the obligations of
any Limited Partner without its consent, unless approved by at least a majority
of the type or class of Units so affected, (ii) enlarge the obligations of,
restrict in any way any action by or rights of, or reduce in any way the amounts
distributable, reimbursable or otherwise payable by the Partnership to the
Managing General Partner or any of its affiliates without its consent, which may
be given or withheld in its sole discretion, (iii) change the term of the
Partnership, (iv) provide that the Partnership is not dissolved upon the
expiration of its term or upon an election to dissolve the Partnership by the
Managing General Partner that is approved by holders of a Unit Majority or (v)
give any person the right to dissolve the Partnership other than the Managing
General Partner's right to dissolve the Partnership with the approval of holders
of a Unit Majority.
 
    The Managing General Partner may generally make amendments to the
Partnership Agreement without the approval of any Partner or assignee to reflect
(i) a change in the name of the Partnership, the location of the principal place
of business of the Partnership, the registered agent or the registered office of
the Partnership, (ii) admission, substitution, withdrawal or removal of partners
in accordance with the Partnership Agreement, (iii) a change that, in the
discretion of the Managing General Partner, is necessary or advisable to qualify
or continue the qualification of the Partnership as a limited partnership or a
partnership in which the Limited Partners have limited liability under the laws
of any state or to ensure that neither the Partnership nor the Operating
Partnership will be treated as an association taxable as a corporation or
otherwise taxed as an entity for federal income tax purposes, (iv) an amendment
that is
 
                                       49
<PAGE>
necessary, in the opinion of counsel to the Partnership, to prevent the
Partnership, or the General Partners or their directors, officers, agents or
trustees, from in any manner being subjected to the provisions of the Investment
Company Act of 1940, as amended, the Investment Advisors Act of 1940, as
amended, or "plan asset" regulations adopted under the Employee Retirement
Income Security Act of 1974, as amended, whether or not substantially similar to
plan asset regulations currently applied or proposed, (v) subject to the
limitations on the issuance of additional Common Units or other limited or
general partner interests described above, an amendment that in the discretion
of the Managing General Partner is necessary or advisable in connection with the
authorization of additional limited or general partner interests, (vi) any
amendment expressly permitted in the Partnership Agreement to be made by the
Managing General Partner acting alone, (vii) an amendment effected, necessitated
or contemplated by a merger agreement that has been approved pursuant to the
terms of the Partnership Agreement, (viii) any amendment that, in the discretion
of the Managing General Partner, is necessary or advisable in connection with
the formation by the Partnership of, or its investment in, any corporation,
partnership or other entity (other than the Operating Partnership) as otherwise
permitted by the Partnership Agreement, (ix) a change in the fiscal year and/or
taxable year of the Partnership and changes related thereto, and (x) any other
amendments substantially similar to any of the foregoing.
 
    In addition to the Managing General Partner's right to amend the Partnership
Agreement as described above, the Managing General Partner may make amendments
to the Partnership Agreement without the approval of any Partner or assignee if
such amendments, in the discretion of the Managing General Partner, (i) do not
adversely affect the Limited Partners in any material respect, (ii) are
necessary or advisable to satisfy any requirements, conditions or guidelines
contained in any opinion, directive, order, ruling or regulation of any federal
or state agency or judicial authority or contained in any federal or state
statute, (iii) are necessary or advisable to facilitate the trading of the
Common Units (including the division of any class or classes of outstanding
Partnership Securities into different classes to facilitate uniformity of tax
consequences within such classes of Partnership Securities) or to comply with
any rule, regulation, guideline or requirement of any securities exchange on
which the Common Units are or will be listed for trading, compliance with any of
which the Managing General Partner deems to be in the best interests of the
Partnership and the Limited Partners, (iv) are necessary or advisable in
connection with any action taken by the Managing General Partner relating to
splits or combinations of Units pursuant to the provisions of the Partnership
Agreement or (v) are required to effect the intent expressed in this Prospectus
or the intent of the Partnership Agreement or contemplated by the Partnership
Agreement.
 
    The Managing General Partner will not be required to obtain an Opinion of
Counsel (as defined below) in the event of the amendments described in the two
immediately preceding paragraphs. No other amendments to the Partnership
Agreement will become effective without the approval of holders of at least 90%
of the Units unless the Partnership obtains an Opinion of Counsel to the effect
that such amendment will not affect the limited liability under applicable law
of any limited partner in the Partnership or the limited partner of the
Operating Partnership.
 
    Any amendment that would have a material adverse effect on the rights or
preferences of any type or class of outstanding Units in relation to other
classes of Units will require the approval of at least a majority of the type or
class of Units so affected. Any amendment that reduces the voting percentage
required to take any action is required to be approved by the affirmative vote
of limited partners constituting not less than the voting requirement sought to
be reduced.
 
MERGER, SALE OR OTHER DISPOSITION OF ASSETS
 
    The Managing General Partner is generally prohibited, without the prior
approval of holders of a Unit Majority, from causing the Partnership to, among
other things, sell, exchange or otherwise dispose of all or substantially all of
its assets in a single transaction or a series of related transactions
(including by way of merger, consolidation or other combination) or approving on
behalf of the Partnership the sale, exchange or other disposition of all or
substantially all of the assets of the Operating Partnership; provided that the
 
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<PAGE>
Managing General Partner may mortgage, pledge, hypothecate or grant a security
interest in all or substantially all of the Partnership's assets without such
approval. The Managing General Partner may also sell all or substantially all of
the Partnership's assets pursuant to a foreclosure or other realization upon the
foregoing encumbrances without such approval. Furthermore, provided that certain
conditions are satisfied, the Managing General Partner may merge the Partnership
or any member of the Partnership Group into, or convey some or all of the
Partnership Group's assets to, a newly formed entity if the sole purpose of such
merger or conveyance is to effect a mere change in the legal form of the
Partnership into another limited liability entity. The Unitholders are not
entitled to dissenters' rights of appraisal under the Partnership Agreement or
applicable Delaware law in the event of a merger or consolidation of the
Partnership, a sale of substantially all of the Partnership's assets or any
other transaction or event.
 
TERMINATION AND DISSOLUTION
 
    The Partnership will continue until December 31, 2086, unless sooner
terminated pursuant to the Partnership Agreement. The Partnership will be
dissolved upon (i) the election of the Managing General Partner to dissolve the
Partnership, if approved by the holders of a Unit Majority, (ii) the sale,
exchange or other disposition of all or substantially all of the assets and
properties of the Partnership and the Operating Partnership, (iii) the entry of
a decree of judicial dissolution of the Partnership or (iv) the withdrawal or
removal of the Managing General Partner or any other event that results in its
ceasing to be the Managing General Partner (other than by reason of a transfer
of its general partner interest in accordance with the Partnership Agreement or
withdrawal or removal following approval and admission of a successor). Upon a
dissolution pursuant to clause (iv), the holders of a Unit Majority may also
elect, within certain time limitations, to reconstitute the Partnership and
continue its business on the same terms and conditions set forth in the
Partnership Agreement by forming a new limited partnership on terms identical to
those set forth in the Partnership Agreement and having as general partner an
entity approved by the holders of a Unit Majority subject to receipt by the
Partnership of an opinion of counsel to the effect that (x) such action would
not result in the loss of limited liability of any Limited Partner and (y)
neither the Partnership, the reconstituted limited partnership nor the Operating
Partnership would be treated as an association taxable as a corporation or
otherwise be taxable as an entity for federal income tax purposes upon the
exercise of such right to continue (hereinafter, an "Opinion of Counsel").
 
LIQUIDATION AND DISTRIBUTION OF PROCEEDS
 
    Upon dissolution of the Partnership, unless the Partnership is reconstituted
and continued as a new limited partnership, the person authorized to wind up the
affairs of the Partnership (the "Liquidator") will, acting with all of the
powers of the Managing General Partner that such Liquidator deems necessary or
desirable in its good faith judgment in connection therewith, liquidate the
Partnership's assets and apply the proceeds of the liquidation as provided in
"Cash Distribution Policy--Distributions of Cash Upon Liquidation." Under
certain circumstances and subject to certain limitations, the Liquidator may
defer liquidation or distribution of the Partnership's assets for a reasonable
period of time or distribute assets to partners in kind if it determines that a
sale would be impractical or would cause undue loss to the partners.
 
WITHDRAWAL OR REMOVAL OF THE GENERAL PARTNERS
 
    The Managing General Partner has agreed not to withdraw voluntarily as a
general partner of the Partnership and the Operating Partnership prior to
December 31, 2006 (with limited exceptions described below), without obtaining
the approval of the holders of a Unit Majority and furnishing an Opinion of
Counsel. On or after December 31, 2006, the Managing General Partner may
withdraw as the Managing General Partner (without first obtaining approval from
any Unitholder) by giving 90 days' written notice, and such withdrawal will not
constitute a violation of the Partnership Agreement. Notwithstanding the
foregoing, the Managing General Partner may withdraw without Unitholder approval
upon 90 days' notice to the Limited Partners if at least 50% of the outstanding
Common Units are held or controlled by one
 
                                       51
<PAGE>
person and its affiliates (other than the Managing General Partner and its
affiliates). In addition, the Partnership Agreement permits the General Partners
(in certain limited instances) to sell or otherwise transfer all of their
general partner interests in the Partnership without the approval of the
Unitholders. See "--Transfer of General Partners' Interests."
 
    Upon the withdrawal of the Managing General Partner under any circumstances
(other than as a result of a transfer by the Managing General Partner of all or
a part of its general partner interests in the Partnership), the holders of a
Unit Majority may select a successor to such withdrawing Managing General
Partner. If such a successor is not elected, or is elected but an Opinion of
Counsel cannot be obtained, the Partnership will be dissolved, wound up and
liquidated, unless within 180 days after such withdrawal the holders of a Unit
Majority agree in writing to continue the business of the Partnership and to
appoint a successor Managing General Partner. See "--Termination and
Dissolution."
 
    The Managing General Partner may not be removed unless such removal is
approved by the vote of the holders of not less than 66 2/3% of the outstanding
Units (including Units held by the General Partners and their affiliates) and
the Partnership receives an Opinion of Counsel. The ownership of the
Subordinated Units by the Managing General Partner and its affiliates
effectively gives the Managing General Partner the ability to prevent its
removal. Any such removal is also subject to the approval of a successor general
partner by the vote of the holders of not less than a Unit Majority. The
Partnership Agreement also provides that if the Managing General Partner is
removed as general partner of the Partnership under circumstances where Cause
does not exist and Units held by the General Partners and their affiliates are
not voted in favor of such removal (i) the Subordination Period will end and all
outstanding Subordinated Units will immediately convert into Common Units on a
one-for-one basis, (ii) any existing Common Unit Arrearages will be extinguished
and (iii) the General Partners will have the right to convert their partner
interests (and all the Incentive Distribution Rights) into Common Units or to
receive cash in exchange for such interests.
 
    Withdrawal or removal of the Managing General Partner as a general partner
of the Partnership also constitutes withdrawal or removal, as the case may be,
of the Managing General Partner as a general partner of the Operating
Partnership. Any withdrawal or removal of the Managing General Partner will
result in the simultaneous withdrawal or removal of the Special General Partner
from the Partnership and the Operating Partnership.
 
    In the event of removal of the General Partners under circumstances where
Cause exists or withdrawal of the General Partners where such withdrawal
violates the Partnership Agreement, a successor general partner will have the
option to purchase the general partner interests and Incentive Distribution
Rights of the departing General Partners (the "Departing Partners") in the
Partnership and the Operating Partnership for a cash payment equal to the fair
market value of such interests. Under all other circumstances where the General
Partners withdraw or are removed by the Limited Partners, the Departing Partners
will have the option to require the successor general partner to purchase such
general partner interest of the Departing Partners and their Incentive
Distribution Rights for such amount. In each case, such fair market value will
be determined by agreement between the Departing Partners and the successor
general partner, or if no agreement is reached, by an independent investment
banking firm or other independent expert selected by the Departing Partners and
the successor general partner (or if no expert can be agreed upon, by an expert
chosen by agreement of the experts selected by each of them). In addition, the
Partnership will be required to reimburse the Departing Partners for all amounts
due the Departing Partners, including, without limitation, all employee-related
liabilities, including severance liabilities, incurred in connection with the
termination of any employees employed by the Departing Partners for the benefit
of the Partnership.
 
    If the above-described option is not exercised by either the Departing
Partners or the successor general partner, as applicable, the Departing
Partners' general partner interests in the Partnership and the Operating
Partnership and their Incentive Distribution Rights will be converted into
Common Units equal
 
                                       52
<PAGE>
to the fair market value of such interests as determined by an investment
banking firm or other independent expert selected in the manner described in the
preceding paragraph.
 
TRANSFER OF GENERAL PARTNERS' INTERESTS AND INCENTIVE DISTRIBUTION RIGHTS
 
    Except for a transfer by a General Partner of all, but not less than all, of
its general partner interest in the Partnership and the Operating Partnership to
(a) an affiliate of such General Partner or (b) another person in connection
with the merger or consolidation of such General Partner with or into another
person or the transfer by such General Partner of all or substantially all of
its assets to another person, such General Partner may not transfer all or any
part of its general partner interest in the Partnership and the Operating
Partnership to another person prior to December 31, 2006, without the approval
of the holders of at least a Unit Majority; provided that, in each case, such
transferee assumes the rights and duties of such General Partner to whose
interest such transferee has succeeded, agrees to be bound by the provisions of
the Partnership Agreement, furnishes an Opinion of Counsel and agrees to acquire
all (or the appropriate portion thereof, as applicable) of such General
Partner's interest in the Operating Partnership and agrees to be bound by the
provisions of the Operating Partnership Agreement. The Special General Partner
cannot transfer its general partner interest in the Partnership and the
Operating Partnership without the approval of the Managing General Partner. The
General Partners shall have the right at any time, however, to transfer their
Subordinated Units to one or more persons without Unitholder approval. At any
time, the stockholders of the General Partners may sell or transfer all or part
of their interest in the General Partners to an affiliate or a third party
without the approval of the Unitholders. Each General Partner or its affiliates
or a subsequent holder may transfer its Incentive Distribution Rights to another
person in connection with its merger or consolidation with or into, or sale of
all or substantially all of its assets to, such person without the prior
approval of the Unitholders. Holders of Incentive Distribution Rights may also
transfer such rights to their affiliates without the prior approval of the
Unitholders. Prior to December 31, 2006, other transfers of the Incentive
Distribution Rights will require the affirmative vote of holders of at least a
Unit Majority. On or after December 31, 2006, the Incentive Distribution Rights
will be freely transferable.
 
CHANGE OF MANAGEMENT PROVISIONS
 
    The Partnership Agreement contains certain provisions that are intended to
discourage a person or group from attempting to remove the Managing General
Partner as general partner of the Partnership or otherwise change the management
of the Partnership. If any person or group other than the Managing General
Partner and its affiliates acquires beneficial ownership of 20% or more of any
class of Units, such person or group loses voting rights with respect to all of
its Units. The Partnership Agreement also provides that if the Managing General
Partner is removed as a general partner of the Partnership under circumstances
where Cause does not exist and Units held by the General Partners and their
affiliates are not voted in favor of such removal, (i) the Subordination Period
will end and all outstanding Subordinated Units will immediately convert into
Common Units on a one-for-one basis, (ii) any existing Common Unit Arrearages
will be extinguished and (iii) the General Partners will have the right to
convert their partner interests (and all of their Incentive Distribution Rights)
into Common Units or to receive cash in exchange for such interests.
 
LIMITED CALL RIGHT
 
    If at any time not more than 20% of the then-issued and outstanding limited
partner interests of any class (including Common Units) are held by persons
other than the Managing General Partner and its affiliates, the Managing General
Partner will have the right, which it may assign in whole or in part to any of
its affiliates or to the Partnership, to acquire all, but not less than all, of
the remaining limited partner interests of such class held by such unaffiliated
persons as of a record date to be selected by the Managing General Partner, on
at least 10 but not more than 60 days' notice. The purchase price in the event
of such a
 
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<PAGE>
purchase shall be the greater of (i) the highest price paid by the Managing
General Partner or any of its affiliates for any limited partner interests of
such class purchased within the 90 days preceding the date on which the Managing
General Partner first mails notice of its election to purchase such limited
partner interests, and (ii) the Current Market Price as of the date three days
prior to the date such notice is mailed. As a consequence of the Managing
General Partner's right to purchase outstanding limited partner interests, a
holder of limited partner interests may have his limited partner interests
purchased even though he may not desire to sell them, or the price paid may be
less than the amount the holder would desire to receive upon the sale of his
limited partner interests. The tax consequences to a Unitholder of the exercise
of this call right are the same as a sale by such Unitholder of his Common Units
in the market. See "Tax Considerations--Disposition of Common Units."
 
MEETINGS; VOTING
 
    Except as described below with respect to a Person or group owning 20% or
more of all Units, Unitholders or assignees who are record holders of Units on
the record date set pursuant to the Partnership Agreement will be entitled to
notice of, and to vote at, meetings of limited partners of the Partnership and
to act with respect to matters as to which approvals may be solicited. With
respect to voting rights attributable to Common Units that are owned by an
assignee who is a record holder but who has not yet been admitted as a limited
partner, the Managing General Partner shall be deemed to be the limited partner
with respect thereto and shall, in exercising the voting rights in respect of
such Common Units on any matter, vote such Common Units at the written direction
of such record holder. Absent such direction, such Common Units will not be
voted (except that, in the case of Common Units held by the Managing General
Partner on behalf of Non-citizen Assignees (as defined below), the Managing
General Partner shall distribute the votes in respect of such Common Units in
the same ratios as the votes of partners in respect of other Units are cast).
 
    The Managing General Partner does not anticipate that any meeting of
Unitholders will be called in the foreseeable future. Any action that is
required or permitted to be taken by the Unitholders may be taken either at a
meeting of the Unitholders or without a meeting if consents in writing setting
forth the action so taken are signed by holders of such number of Units as would
be necessary to authorize or take such action at a meeting of all of the
Unitholders. Meetings of the Unitholders of the Partnership may be called by the
Managing General Partner or by Unitholders owning at least 20% of the
outstanding Units of the class for which a meeting is proposed. Unitholders may
vote either in person or by proxy at meetings. The holders of a majority of the
outstanding Units of the class or classes for which a meeting has been called
represented in person or by proxy shall constitute a quorum at a meeting of
Unitholders of such class or classes, unless any such action by the Unitholders
requires approval by holders of a greater percentage of such Units, in which
case the quorum shall be such greater percentage.
 
    Each record holder of a Unit has a vote according to his percentage interest
in the Partnership, although additional limited partner interests having special
voting rights could be issued by the Partnership. See "--Issuance of Additional
Securities." However, if at any time any person or group (other than the
Managing General Partner and its affiliates) acquires, in the aggregate,
beneficial ownership of 20% or more of any class of Units then outstanding, such
person or group will lose voting rights with respect to all of its Units and
such Units may not be voted on any matter and will not be considered to be
outstanding when sending notices of a meeting of Unitholders, calculating
required votes, determining the presence of a quorum or for other similar
Partnership purposes. The Partnership Agreement provides that Common Units held
in nominee or street name account will be voted by the broker (or other nominee)
pursuant to the instruction of the beneficial owner unless the arrangement
between the beneficial owner and his nominee provides otherwise. Except as
otherwise provided in the Partnership Agreement, Subordinated Units will vote
together with Common Units as a single class.
 
    Any notice, demand, request, report or proxy material required or permitted
to be given or made to record holders of Common Units (whether or not such
record holder has been admitted as a limited
 
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<PAGE>
partner) under the terms of the Partnership Agreement will be delivered to the
record holder by the Partnership or by the Transfer Agent at the request of the
Partnership.
 
STATUS AS LIMITED PARTNER OR ASSIGNEE
 
    Except as described above under "--Limited Liability," the Common Units will
be fully paid, and Unitholders will not be required to make additional
contributions to the Partnership. An assignee of a Common Unit, subsequent to
executing and delivering a Transfer Application, but pending its admission as a
substituted Limited Partner in the Partnership, is entitled to an interest in
the Partnership equivalent to that of a Limited Partner with respect to the
right to share in allocations and distributions from the Partnership, including
liquidating distributions. The Managing General Partner will vote and exercise
other powers attributable to Common Units owned by an assignee who has not
become a substitute Limited Partner at the written direction of such assignee.
See "--Meetings; Voting." Transferees who do not execute and deliver a Transfer
Application will be treated neither as assignees nor as record holders of Common
Units, and will not receive cash distributions, federal income tax allocations
or reports furnished to record holders of Common Units. See "Description of the
Common Units--Transfer of Common Units."
 
NON-CITIZEN ASSIGNEES; REDEMPTION
 
    If the Partnership is or becomes subject to federal, state or local laws or
regulations that, in the reasonable determination of the Managing General
Partner, create a substantial risk of cancellation or forfeiture of any property
in which the Partnership has an interest because of the nationality, citizenship
or other related status of any Limited Partner or assignee, the Partnership may
redeem the Units held by such Limited Partner or assignee at their Current
Market Price (as defined in the Glossary). In order to avoid any such
cancellation or forfeiture, the Managing General Partner may require each
Limited Partner or assignee to furnish information about his nationality,
citizenship or related status. If a Limited Partner or assignee fails to furnish
information about such nationality, citizenship or other related status within
30 days after a request for such information or the Managing General Partner
determines after receipt of such information that the Limited Partner or
assignee is not an eligible citizen, such Limited Partner or assignee may be
treated as a non-citizen assignee ("Non-citizen Assignee"). In addition to other
limitations on the rights of an assignee who is not a substituted Limited
Partner, a Non-citizen Assignee does not have the right to direct the voting of
his Units and may not receive distributions in kind upon liquidation of the
Partnership.
 
INDEMNIFICATION
 
    The Partnership Agreement provides that the Partnership will indemnify the
General Partners, any Departing Partner, any Person who is or was an affiliate
of a General Partner or any Departing Partner, any Person who is or was a
member, partner, officer, director, employee, agent or trustee of a General
Partner or any Departing Partner or any affiliate of a General Partner or any
Departing Partner, or any Person who is or was serving at the request of a
General Partner or any Departing Partner or any affiliate of any such person,
any affiliate of a General Partner or any Departing Partner as an officer,
director, employee, member, partner, agent, fiduciary or trustee of another
Person ("Indemnitees"), to the fullest extent permitted by law, from and against
any and all losses, claims, damages, liabilities (joint or several), expenses
(including, without limitation, legal fees and expenses), judgments, fines,
penalties, interest, settlements and other amounts arising from any and all
claims, demands, actions, suits or proceedings, whether civil, criminal,
administrative or investigative, in which any Indemnitee may be involved, or is
threatened to be involved, as a party or otherwise, by reason of its status as
an Indemnitee; provided that in each case the Indemnitee acted in good faith and
in a manner that such Indemnitee reasonably believed to be in or not opposed to
the best interests of the Partnership and, with respect to any criminal
proceeding, had no reasonable cause to believe its conduct was unlawful. Any
indemnification under these provisions
 
                                       55
<PAGE>
will be only out of the assets of the Partnership, and the General Partners
shall not be personally liable for, or have any obligation to contribute or loan
funds or assets to the Partnership to enable it to effectuate, such
indemnification. The Partnership is authorized to purchase (or to reimburse the
General Partners or their affiliates for the cost of) insurance against
liabilities asserted against and expenses incurred by such persons in connection
with the Partnership's activities, regardless of whether the Partnership would
have the power to indemnify such person against such liabilities under the
provisions described above.
 
BOOKS AND REPORTS
 
    The Managing General Partner is required to keep appropriate books of the
business of the Partnership at the principal offices of the Partnership. The
books will be maintained for both tax and financial reporting purposes on an
accrual basis. For tax purposes, the fiscal year of the Partnership is the
calendar year. For financial reporting purposes, however, the fiscal year of the
Partnership is a fiscal year ending on June 30.
 
    As soon as practicable, but in no event later than 120 days after the close
of each fiscal year, the Managing General Partner will furnish or make available
to each record holder of Units (as of a record date selected by the Managing
General Partner) an annual report containing audited financial statements of the
Partnership for the past fiscal year, prepared in accordance with generally
accepted accounting principles. As soon as practicable, but in no event later
than 90 days after the close of each quarter (except the last quarter of each
fiscal year), the Managing General Partner will furnish or make available to
each record holder of Units (as of a record date selected by the Managing
General Partner) a report containing unaudited financial statements of the
Partnership with respect to such quarter and such other information as may be
required by law.
 
    The Partnership will furnish each record holder of a Unit information
reasonably required for tax reporting purposes within 90 days after the close of
each calendar year. Such information is expected to be furnished in summary form
so that certain complex calculations normally required of partners can be
avoided. The Partnership's ability to furnish such summary information to
Unitholders will depend on the cooperation of such Unitholders in supplying
certain information to the Partnership. Every Unitholder (without regard to
whether he supplies such information to the Partnership) will receive
information to assist him in determining his federal and state tax liability and
filing his federal and state income tax returns.
 
RIGHT TO INSPECT PARTNERSHIP BOOKS AND RECORDS
 
    The Partnership Agreement provides that a Limited Partner can for a purpose
reasonably related to such Limited Partner's interest as a limited partner, upon
reasonable demand and at his own expense, have furnished to him (i) a current
list of the name and last known address of each partner, (ii) a copy of the
Partnership's tax returns, (iii) information as to the amount of cash, and a
description and statement of the agreed value of any other property or services,
contributed or to be contributed by each partner and the date on which each
became a partner, (iv) copies of the Partnership Agreement, the certificate of
limited partnership of the Partnership, amendments thereto and powers of
attorney pursuant to which the same have been executed, (v) information
regarding the status of the Partnership's business and financial condition, and
(vi) such other information regarding the affairs of the Partnership as is just
and reasonable. The Partnership may, and intends to, keep confidential from the
Limited Partners trade secrets or other information the disclosure of which the
Partnership believes in good faith is not in the best interests of the
Partnership or which the Partnership is required by law or by agreements with
third parties to keep confidential.
 
                                       56
<PAGE>
REGISTRATION RIGHTS
 
    Pursuant to the terms of the Partnership Agreement and subject to certain
limitations described therein, the Partnership has agreed to register for resale
under the Securities Act and applicable state securities laws any Common Units
or other securities of the Partnership (including Subordinated Units) proposed
to be sold by the General Partners or any of their affiliates if an exemption
from such registration requirements is not otherwise available for such proposed
transaction. The Partnership is obligated to pay all expenses incidental to such
registration, excluding underwriting discounts and commissions. See "Units
Eligible for Future Sale."
 
              CONFLICTS OF INTEREST AND FIDUCIARY RESPONSIBILITIES
 
CONFLICTS OF INTEREST
 
    Certain conflicts of interest exist and may arise in the future as a result
of the relationships between the General Partners and their stockholders, on the
one hand, and the Partnership and its limited partners, on the other hand. The
directors and officers of the Managing General Partner have fiduciary duties to
manage the Managing General Partner, including its investments in its
subsidiaries and affiliates, in a manner beneficial to its stockholder. At the
same time, the Managing General Partner has a fiduciary duty to manage the
Partnership in a manner beneficial to the Partnership and the Unitholders. The
Partnership Agreement contains provisions that allow the Managing General
Partner to take into account the interests of parties in addition to the
Partnership in resolving conflicts of interest, thereby limiting its fiduciary
duty to the Unitholders, as well as provisions that may restrict the remedies
available to Unitholders for actions taken that might, without such limitations,
constitute breaches of fiduciary duty. The duty of the directors and officers of
the Managing General Partner to its stockholder may, therefore, come into
conflict with the duties of the Managing General Partner to the Partnership and
the Unitholders. The Audit Committee of the Board of Directors of the Managing
General Partner will, at the request of the Managing General Partner, review
conflicts of interest that may arise between the Managing General Partner or its
affiliates, on the one hand, and the Partnership, on the other. The Partnership
Agreement provides that the Managing General Partner may adopt a resolution or
course of action that has not been approved by a majority of the members of the
Audit Committee.
 
    The fiduciary obligations of general partners is a developing area of law.
The provisions of the Delaware Act that allow the fiduciary duties of a general
partner to be waived or restricted by a partnership agreement have not been
resolved in a court of law, and the Managing General Partner has not obtained an
opinion of counsel covering the provisions set forth in the Partnership
Agreement that purport to waive or restrict fiduciary duties of the Managing
General Partner. Unitholders should consult their own legal counsel concerning
the fiduciary responsibilities of the Managing General Partner and its officers
and directors and the remedies available to the Unitholders.
 
    THE PARTNERSHIP REIMBURSES THE MANAGING GENERAL PARTNER AND ITS AFFILIATES
     FOR CERTAIN EXPENSES
 
    Under the terms of the Partnership Agreement, the Managing General Partner
and its affiliates are reimbursed by the Partnership for certain expenses
incurred on behalf of the Partnership, including costs incurred in providing
corporate staff and support services to the Partnership. The Partnership
Agreement provides that the Managing General Partner will determine the expenses
that are allocable to the Partnership in any reasonable manner determined by the
Managing General Partner in its sole discretion.
 
    THE MANAGING GENERAL PARTNER INTENDS TO LIMIT ITS LIABILITY WITH RESPECT TO
     THE PARTNERSHIP'S OBLIGATIONS
 
    Whenever possible, the Managing General Partner intends to limit the
Partnership's liability under contractual arrangements to all or particular
assets of the Partnership, with the other party thereto having no recourse
against the General Partners or their assets. The Partnership Agreement provides
that any
 
                                       57
<PAGE>
action by the Managing General Partner in so limiting the liability of the
General Partners or that of the Partnership will not be deemed to be a breach of
the Managing General Partner's fiduciary duties, even if the Partnership could
have obtained more favorable terms without such limitation on liability.
 
    THE NEW ACQUISITION INCENTIVE PLAN MAY GIVE MANAGEMENT INCENTIVES TO MAKE
     ACQUISITIONS THAT ARE NOT BENEFICIAL TO THE PARTNERSHIP
 
    The terms of the New Acquisition Incentive Plan could give the senior
executives of the Managing General Partner an incentive to cause the Partnership
to acquire additional propane operations without regard to whether the
operations would prove beneficial to the Partnership and may present the senior
executives of the Managing General Partner with a conflict of interest in
negotiating the acquisition price on behalf of the Partnership. Mr. Baxter, the
only participant in the New Acquisition Incentive Plan who is a member of the
Board of Directors of the Managing General Partner, has agreed that he will not
participate in any board deliberations regarding potential acquisitions subject
to the New Acquisition Incentive Plan. The Partnership believes that the fact
that the ultimate decision regarding acquisitions and their terms will be made
by directors who have no interest in the New Acquisition Incentive Plan will
significantly reduce the potential conflicts resulting from the structure of the
plan.
 
    COMMON UNITS ARE SUBJECT TO THE MANAGING GENERAL PARTNER'S LIMITED CALL
     RIGHT
 
    The Managing General Partner may exercise its right to call and purchase
Units as provided in the Partnership Agreement or assign such right to one of
its affiliates or to the Partnership. The Managing General Partner may use its
own discretion, free of fiduciary duty restrictions, in determining whether to
exercise such right. As a consequence, a Common Unitholder may have his Common
Units purchased from him even though he may not desire to sell them, and the
price paid may be less than the amount the holder would desire to receive upon
sale of his Common Units. For a description of such right, see "The Partnership
Agreement--Limited Call Right."
 
    THE PARTNERSHIP MAY RETAIN SEPARATE COUNSEL FOR ITSELF OR FOR THE HOLDERS OF
     COMMON UNITS; ADVISORS RETAINED BY THE PARTNERSHIP HAVE NOT BEEN RETAINED
     TO ACT FOR HOLDERS OF COMMON UNITS
 
    The Common Unitholders were not represented by counsel in connection with
the preparation of the Partnership Agreement or other agreements referred to
herein. The attorneys, independent public accountants and others who have
performed services for the Partnership in connection with the IPO, the
Transactions and the offering made hereby have been retained by the Managing
General Partner, its affiliates and the Partnership and may continue to be
retained by the Managing General Partner, its affiliates and the Partnership.
Attorneys, independent public accountants and others who will perform services
for the Partnership in the future will be selected by the Managing General
Partner or the Audit Committee and may also perform services for the Managing
General Partner and its affiliates. The Partnership may retain separate counsel
for itself or the holders of Common Units in the event of a conflict of interest
arising between the Managing General Partner and its affiliates, on the one
hand, and the Partnership or the holders of Common Units, on the other,
depending on the nature of such conflict, but it does not intend to do so in
most cases.
 
    THE MANAGING GENERAL PARTNER IS NOT RESTRICTED FROM ENGAGING IN A
     TRANSACTION WHICH WOULD TRIGGER CHANGE OF CONTROL PROVISIONS
 
    The Partnership's indebtedness contains provisions relating to change of
control. If such change of control provisions are triggered, such outstanding
indebtedness may become due. There is no restriction on the ability of the
Managing General Partner or Northwestern Growth to enter into a transaction
which would trigger such change of control provisions. See "Management's
Discussion and Analysis of Financial
 
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Condition and Results of Operations--Liquidity and Capital Resources--Financing
and Sources of Liquidity."
 
    THE GENERAL PARTNERS' AFFILIATES MAY COMPETE WITH THE PARTNERSHIP
 
    The Managing General Partner may not engage in any business or activity or
incur any debts or liabilities except in connection with or incidental to (i)
its performance as a general partner of the Partnership or one or more
affiliates of the Partnership, (ii) the acquiring, owning or disposing of debt
or equity securities of the Partnership or such affiliates, and (iii) permitting
its employees to perform services for its affiliates. Except as limited by the
next paragraph, the Special General Partner and other affiliates of the Managing
General Partner (including NOR and Northwestern Growth) are not restricted from
engaging in any business activities, including those in competition with the
Partnership.
 
    Affiliates of the Managing General Partner may engage in a business activity
that involves the retail sale of propane to end users in the continental United
States only if (i) the Managing General Partner determines in its reasonable
judgment, prior to the commencement of such activity, that it is not in the best
interests of the Partnership to engage in such activity either (A) because of
the financial commitments or operating characteristics associated with such
activity or (B) because such activity is not consistent with the business
strategy or cannot otherwise be integrated with the Partnership's operations on
a basis beneficial to the Partnership; or (ii) such activity is being undertaken
as provided in a joint venture agreement or other agreement between the
Partnership and an affiliate of the Managing General Partner and such joint
venture or other agreement was determined at the time it was entered into to be
fair to the Partnership in the reasonable judgment of the Managing General
Partner.
 
    There are no restrictions on the ability of affiliates of the Managing
General Partner to engage in the retail sale of propane outside the continental
United States or in the trading, transportation, storage and wholesale
distribution of propane. The Partnership Agreement expressly provides that if
the Managing General Partner or its affiliates act in accordance with the
foregoing, it shall not constitute a breach of the Managing General Partner's
fiduciary duties to the Partnership or the Unitholders if the Managing General
Partner or its affiliates engage in direct competition with the Partnership.
 
    THE PARTNERSHIP AGREEMENT PERMITS THE PARTNERSHIP TO ENGAGE IN ROLL-UP
     TRANSACTIONS
 
    The Partnership Agreement does not prohibit the Partnership from engaging in
roll-up transactions. Were the Managing General Partner to cause the Partnership
to engage in a roll-up transaction, there could be no assurance that such a
transaction would not have a material adverse effect on a Unitholder's
investment in the Partnership.
 
FIDUCIARY AND OTHER DUTIES
 
    The General Partners will be accountable to the Partnership and the
Unitholders as fiduciaries. Consequently, the Managing General Partner must
exercise due care, good faith and integrity in handling the assets and affairs
of the Partnership. In contrast to the relatively well-developed law concerning
fiduciary duties owed by officers and directors to the shareholders of a
corporation, the law concerning the duties owed by general partners to other
partners and to partnerships is relatively undeveloped. Neither the Delaware
Revised Uniform Limited Partnership Act (the "Delaware Act") nor case law
defines with particularity the fiduciary duties owed by general partners to
limited partners or a limited partnership, but the Delaware Act provides that
Delaware limited partnerships may, in their partnership agreements, restrict or
expand the fiduciary duties that might otherwise be applied by a court in
analyzing the standard of duty owed by general partners to limited partners and
the partnership.
 
                                       59
<PAGE>
    Fiduciary duties are generally considered to include an obligation to act
with due care and the highest good faith, fairness and loyalty. Such duty of
loyalty, in the absence of a provision in a partnership agreement providing
otherwise, would generally prohibit a general partner of a Delaware limited
partnership from taking any action or engaging in any transaction as to which it
has a conflict of interest. In order to induce the Managing General Partner to
manage the business of the Partnership, the Partnership Agreement, as permitted
by the Delaware Act, contains various provisions intended to have the effect of
restricting the fiduciary duties that might otherwise be owed by the Managing
General Partner to the Partnership and its partners and waiving or consenting to
conduct by the Managing General Partner and its affiliates that might otherwise
raise issues as to compliance with fiduciary duties or applicable law.
 
    The Partnership Agreement provides that in order to become a limited partner
of the Partnership, a holder of Common Units is required to agree to be bound by
the provisions thereof, including the provisions discussed above. This is in
accordance with the policy of the Delaware Act favoring the principle of freedom
of contract and the enforceability of partnership agreements. The Delaware Act
also provides that a partnership agreement is not unenforceable by reason of its
not having been signed by a person being admitted as a limited partner or
becoming an assignee in accordance with the terms thereof.
 
    The Partnership Agreement provides that whenever a conflict arises between
the General Partners or their affiliates, on the one hand, and the Partnership
or any other partner, on the other, the Managing General Partner shall resolve
such conflict. The Managing General Partner in general shall not be in breach of
its obligations under the Partnership Agreement or its duties to the Partnership
or the Unitholders if the resolution of such conflict is fair and reasonable to
the Partnership, and any resolution shall conclusively be deemed to be fair and
reasonable to the Partnership if such resolution is (i) approved by the Audit
Committee (although no party is obligated to seek such approval and the Managing
General Partner may adopt a resolution or course of action that has not received
such approval), (ii) on terms no less favorable to the Partnership than those
generally being provided to or available from unrelated third parties or (iii)
fair to the Partnership, taking into account the totality of the relationships
between the parties involved (including other transactions that may be
particularly favorable or advantageous to the Partnership). In resolving such
conflict, the Managing General Partner may (unless the resolution is
specifically provided for in the Partnership Agreement) consider the relative
interests of the parties involved in such conflict or affected by such action,
any customary or accepted industry practices or historical dealings with a
particular person or entity and, if applicable, generally accepted accounting
practices or principles and such other factors as its deems relevant. Thus,
unlike the strict duty of a fiduciary who must act solely in the best interests
of his beneficiary, the Partnership Agreement permits the Managing General
Partner to consider the interests of all parties to a conflict of interest,
including the interests of the General Partners. In connection with the
resolution of any conflict that arises, unless the Managing General Partner has
acted in bad faith, the action taken by the Managing General Partner shall not
constitute a breach of the Partnership Agreement, any other agreement or any
standard of care or duty imposed by the Delaware Act or other applicable law.
The Partnership also provides that in certain circumstances the Managing General
Partner may act in its sole discretion, in good faith or pursuant to other
appropriate standards.
 
    The Delaware Act provides that a limited partner may institute legal action
on behalf of the partnership (a partnership derivative action) to recover
damages from a third party where the general partner has refused to institute
the action or where an effort to cause the general partner to do so is not
likely to succeed. In addition, the statutory or case law of certain
jurisdictions may permit a limited partner to institute legal action on behalf
of himself and all other similarly situated limited partners (a class action) to
recover damages from a general partner for violations of its fiduciary duties to
the limited partners.
 
    The Partnership Agreement also provides that any standard of care and duty
imposed thereby or under the Delaware Act or any applicable law, rule or
regulation will be modified, waived or limited, to the extent permitted by law,
as required to permit the Managing General Partner and its officers and
directors to act under the Partnership Agreement or any other agreement
contemplated therein and to make any
 
                                       60
<PAGE>
decisions pursuant to the authority prescribed in the Partnership Agreement, so
long as such action is reasonably believed by the Managing General Partner to be
in, or not inconsistent with, the best interests of the Partnership. Further,
the Partnership Agreement provides that the General Partners and their officers
and directors will not be liable for monetary damages to the Partnership, the
limited partners or assignees for errors of judgment or for any acts or
omissions if the Managing General Partner and such other persons acted in good
faith.
 
    In addition, under the terms of the Partnership Agreement, the Partnership
is required to indemnify the General Partners and their officers, directors,
employees, affiliates, partners, members, agents and trustees, to the fullest
extent permitted by law, against liabilities, costs and expenses incurred by the
General Partners or such other persons, if the General Partners or such persons
acted in good faith and in a manner they reasonably believed to be in, or not
opposed to, the best interests of the Partnership and, with respect to any
criminal proceedings, had no reasonable cause to believe their conduct was
unlawful. See "The Partnership Agreement--Indemnification." Thus, the General
Partners could be indemnified for their negligent acts if they meet such
requirements concerning good faith and the best interests of the Partnership.
 
                               TAX CONSIDERATIONS
 
    The following section describes the material United States tax
considerations that may be relevant to prospective Unitholders. The statements
of law or legal conclusion set forth in this section constitute the opinion of
McCutchen, Doyle, Brown & Enersen, LLP, counsel to the General Partners and the
Partnership ("Counsel"). This section is based upon current provisions of the
Internal Revenue Code of 1986, as amended (the "Code"), existing and proposed
regulations thereunder and current administrative rulings and court decisions,
including modifications made by the Taxpayer Relief Act of 1997 (the "1997 Act")
and the IRS Restructuring and Reform Act of 1998 (the "1998 Act"), all of which
are subject to change at any time. Such changes, which may be applied
retroactively, may cause the tax consequences to vary substantially from the
consequences described below. Unless the context otherwise requires, references
in this section to the Partnership are references to both the Partnership and
the Operating Partnership.
 
    This section only addresses the tax consequences to Unitholders who are
individual citizens or residents of the United States and has only limited
application to corporations, estates, trusts, non-resident aliens or other
Unitholders subject to specialized tax treatment (such as tax-exempt
institutions, foreign persons, individual retirement accounts, REITs or mutual
funds). This section does not address all tax consequences that may be
applicable to a Unitholder. Accordingly, each prospective Unitholder should
consult, and should depend on, his own tax advisor in analyzing the federal,
state, local and foreign tax consequences peculiar to him of the ownership or
disposition of Common Units.
 
    For the reasons hereinafter described, Counsel has not rendered an opinion
with respect to the following specific federal income tax issues: (i) the
treatment of a Unitholder whose Common Units are loaned to a short seller to
cover a short sale of Common Units (see "--Tax Treatment of Operations--
Treatment of Short Sales"), (ii) whether a Unitholder acquiring Common Units in
separate transactions must maintain a single aggregate adjusted tax basis in his
Common Units (see "--Disposition of Common Units--Recognition of Gain or Loss"),
(iii) whether the Partnership's monthly convention for allocating taxable income
and losses is permitted by existing Treasury Regulations (see "--Disposition of
Common Units--Allocations Between Transferors and Transferees"), (iv) whether
the Partnership's convention for allocating recapture income will be recognized
for federal income tax purposes (see "--Allocation of Partnership Income, Gain,
Loss and Deduction"), and (v) whether the Partnership's method for depreciating
Section 743 adjustments will be recognized for federal income tax purposes (see
"--Tax Treatment of Operations--Section 754 Election").
 
    An opinion of counsel represents only that counsel's best legal judgment and
does not bind the Internal Revenue Service (the "IRS") or the courts. No ruling
has been or will be requested from the IRS
 
                                       61
<PAGE>
with respect to classification of the Partnership as a partnership for federal
income tax purposes, whether the Partnership's propane operations generate
"qualifying income" under Section 7704 of the Code or any other matter affecting
the Partnership or prospective Unitholders. Thus, no assurance can be provided
that the opinions set forth herein would be sustained by a court if contested by
the IRS. Any such contest with the IRS may materially and adversely impact the
market for the Common Units and the prices at which Common Units trade. In
addition, the costs of any contest with the IRS will be borne directly or
indirectly by the Unitholders and the General Partners.
 
TAX RATES
 
    The top marginal income tax rate for individuals is 36% subject to a 10%
surtax on individuals with taxable income in excess of $278,450 per year. The
surtax is computed by applying a 39.6% rate to taxable income in excess of the
threshold. As provided in the 1998 Act, long-term capital gains recognized after
January 1, 1998 on marketable securities such as Common Units will be taxed at a
maximum rate of 20% for individuals if the individual's holding period is more
than one year.
 
PARTNERSHIP STATUS
 
    A partnership is not a taxable entity and incurs no federal income tax
liability. Instead, each partner is required to take into account his allocable
share of items of income, gain, loss and deduction of the partnership in
computing his federal income tax liability, regardless of whether cash
distributions are made. Distributions by a partnership to a partner are
generally not taxable unless the amount of any cash distributed is in excess of
the partner's adjusted basis in his partnership interest.
 
    No ruling has been or will be sought from the IRS as to the status of the
Partnership or the Operating Partnership as a partnership for federal income tax
purposes. Instead the Partnership has relied on the opinion of Counsel that,
based upon the Code, the regulations thereunder, published revenue rulings and
court decisions, the Partnership and the Operating Partnership will each be
classified as a partnership for federal income tax purposes.
 
    In rendering its opinion, Counsel has relied on certain factual
representations made by the Partnership and the General Partners. Such factual
matters are as follows:
 
    (a) Neither the Partnership nor the Operating Partnership has or will elect
       to be treated as an association or corporation;
 
    (b) The Partnership and the Operating Partnership have been and will be
       operated in accordance with (i) all applicable partnership statutes, (ii)
       the applicable partnership agreement, and (iii) the description thereof
       in this Prospectus;
 
    (c) The General Partners have and will, at all times, act independently of
       the limited partners (other than the limited partner interest held by the
       General Partners); and
 
    (d) For each taxable year of the Partnership's existence, at least 90% of
       the gross income of the Partnership has been and will be derived from (i)
       the exploration, development, production, processing, refining,
       transportation or marketing of any mineral or natural resource, including
       oil, gas or products thereof and (ii) other items of "qualifying income"
       within the meaning of Section 7704(d) of the Code.
 
    Section 7704 of the Code provides that publicly-traded partnerships will, as
a general rule, be taxed as corporations. However, an exception (the "Qualifying
Income Exception") exists with respect to publicly-traded partnerships of which
90% or more of the gross income for every taxable year consists of "qualifying
income." Qualifying income includes interest (from other than a financial
business), dividends and income and gains from the exploration, development,
production, processing, refining, transportation and marketing of crude oil,
natural gas, and products thereof, including the retail and wholesale marketing
 
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<PAGE>
of propane and the transportation of propane and natural gas liquids. The
Partnership estimates that less than 7% of its gross income for each taxable
year will not constitute qualifying income.
 
    If the Partnership fails to meet the Qualifying Income Exception (other than
a failure which is determined by the IRS to be inadvertent and which is cured
within a reasonable time after discovery), the Partnership will be treated as if
it had transferred all of its assets (subject to liabilities) to a newly formed
corporation (on the first day of the year in which it fails to meet the
Qualifying Income Exception) in return for stock in that corporation, and then
distributed that stock to the partners in liquidation of their interests in the
Partnership. This contribution and liquidation should be tax-free to Unitholders
and the Partnership, so long as the Partnership, at that time, does not have
liabilities in excess of the tax basis of its assets. Thereafter, the
Partnership would be treated as a corporation for federal income tax purposes.
 
    If the Partnership or the Operating Partnership were treated as an
association taxable as a corporation in any taxable year, either as a result of
a failure to meet the Qualifying Income Exception or otherwise, its items of
income, gain, loss and deduction would be reflected only on its tax return
rather than being passed through to the Unitholders, and its net income would be
taxed to the Partnership or the Operating Partnership at corporate rates. In
addition, any distribution made to a Unitholder would be treated as either
taxable dividend income (to the extent of the Partnership's current or
accumulated earnings and profits) or (in the absence of earnings and profits) a
nontaxable return of capital (to the extent of the Unitholder's tax basis in his
Common Units) or taxable capital gain (after the Unitholder's tax basis in the
Common Units is reduced to zero). Accordingly, treatment of either the
Partnership or the Operating Partnership as an association taxable as a
corporation would result in a material reduction in a Unitholder's cash flow and
after-tax return and thus would likely result in a substantial reduction of the
value of the Units.
 
    The discussion below is based on the assumption that both the Partnership
and the Operating Partnership will be classified as partnerships for federal
income tax purposes.
 
CONSEQUENCES OF EXCHANGING PROPERTY FOR COMMON UNITS
 
    RECOGNITION OF GAIN OR LOSS
 
    In general, no gain or loss will be recognized for federal income tax
purposes by the Partnership or by a person (including any individual,
partnership, S corporation or corporation taxed under Subchapter C of the Code)
contributing property (including stock) to the Partnership in exchange for
Common Units. If the Partnership assumes liabilities or takes assets subject to
liabilities in connection with a contribution of assets in exchange for Common
Units, however, the application of either one or both of two federal income tax
rules may result in the recognition of taxable gain by the contributing person.
 
    The first of these rules is the "disguised sale rule." Under the disguised
sale rule, if the Partnership assumes or takes property subject to a liability
of the contributing person other than a "qualified liability," the Partnership
is treated as transferring taxable consideration to the contributing person to
the extent that the amount of the liability exceeds the contributing person's
share of that liability immediately after the Partnership assumes or takes
subject to the liability. For this purpose, a qualified liability includes: (a)
a liability that was incurred by the partner more than two years prior to the
earlier of the date the partner agrees in writing to transfer the property or
the date the partner transfers the property to the Partnership and that has
encumbered the transferred property throughout that two-year period; (b) a
liability that was not incurred in anticipation of the transfer of the property
to the Partnership, but that was incurred by the partner within the two-year
period prior to the earlier of the date the partner agrees in writing to
transfer the property or the date the partner transfers the property to the
Partnership and that has encumbered the transferred property since it was
incurred; (c) a liability that is allocable under the rules of Treasury
Regulation Section 1.163-8T to capital expenditures with respect to the
property; or (d) a liability that was incurred in the ordinary course of the
trade or business in which property transferred to the Partnership was used or
held but only if all the assets related to that trade or business are
transferred other than assets
 
                                       63
<PAGE>
that are not material to a continuation of the trade or business. Assuming that
any such liabilities are nonrecourse in nature (no partner of the Partnership
has any liability for failure to pay), a contributing person's "share" of the
liabilities will generally equal his Percentage Interest in the Partnership
multiplied by the amount of such liabilities.
 
    If the disguised sale rule applies to a contribution of assets in exchange
for Common Units, the person contributing assets will recognize taxable gain in
an amount equal to the amount of taxable consideration determined as described
above, minus a proportionate share of the tax basis in the contributed assets.
 
    The second rule under which a person contributing assets in exchange for
Common Units could recognize taxable gain is the "distribution in excess of
basis rule." Under this rule, a person contributing assets to the Partnership
will recognize gain if, and to the extent that, the difference between the
amount of such liabilities and the contributing person's share of those
liabilities (determined under the principles of Section 752 of the Code)
immediately following the transfer of assets to the Partnership exceeds the tax
basis of the assets contributed.
 
    Any such gain may be taxed as ordinary income or capital gains. See
"Disposition of Common Units" below.
 
    ALLOCATIONS OF INCOME, DEPRECIATION AND AMORTIZATION
 
    As required by Section 704(c) of the Code, certain items of Partnership
income, deduction, gain and loss will be specially allocated to account for the
difference between the tax basis and fair market value of property contributed
to the Partnership in exchange for Common Units ("Contributed Property") (any
excess of the fair market value over the tax basis of Contributed Property is
referred to herein as "built-in gain"; any excess of the tax basis over fair
market value is referred to as "built-in loss"). These allocations are designed
to insure that a person contributing property to the Partnership will recognize
the federal income tax consequences associated with any built-in gain or
built-in loss. In general, a partner contributing assets with a built-in gain
will not recognize taxable gain upon the contribution of those assets in
exchange for Common Units. See "Recognition of Gain or Loss" above. However,
such built-in gain will be recognized over the period of time during which the
Partnership claims depreciation or amortization deductions with respect to the
Contributed Property, or when the Partnership disposes of the Contributed
Property.
 
    BASIS OF COMMON UNITS
 
    A person who contributes property (including stock) to the Partnership in
exchange for Common Units will generally have an initial tax basis for his
Common Units equal to the tax basis of the property contributed to the
Partnership in exchange for Common Units plus any gain recognized on the
contribution. The tax basis for a Common Unit will be increased by the
Unitholder's share of Partnership income and his share of increases in
Partnership debt. The basis for a Common Unit will be decreased (but not below
zero) by distributions from the Partnership (including deemed distributions
resulting from the assumption of indebtedness by the Partnership), by the
Unitholder's share of Partnership losses, by his share of decreases in
Partnership debt and by the Unitholder's share of expenditures of the
Partnership that are not deductible in computing its taxable income and are not
required to be capitalized.
 
OWNERSHIP OF UNITS BY S CORPORATIONS
 
    Section 1362(b) of the Code provides that certain small business
corporations may elect to be treated as "S corporations." In order to elect S
corporation status, a corporation must not: (a) have more than 75 shareholders
(a husband and wife are treated as one shareholder); (b) have as a shareholder a
person (other than an estate, certain trusts and certain tax-exempt
organizations) who is not an individual; (c) have a nonresident alien as a
shareholder; and (d) have more than one class of stock. All of the persons who
are shareholders of a corporation at the time it elects to be an S corporation
must consent to the S
 
                                       64
<PAGE>
election. The election is made by filing Form 2553, which must be filed on or
before the 15th day of the third month of a taxable year in order for the
election to be effective for that taxable year. (A corporation that has not
elected S corporation status is referred to as a "C corporation").
 
    In general, an S corporation is not subject to tax on its income. Instead,
each shareholder takes into account his pro rata share of the corporation's
items of income (including tax-exempt income), loss, deduction or credit. The
character of any item included in a shareholder's pro rata share is determined
as if such item were realized or incurred directly by the shareholder. Thus, an
S corporation that exchanges its assets for Common Units will not generally pay
tax on its distributive share of partnership income. Instead, such income will
be taxed as if the Common Units were held directly by the shareholders of the S
corporation.
 
    Distributions made by an S corporation are generally nontaxable to the
extent they are made out of the corporation's "accumulated adjustments account,"
which represents the undistributed income of the corporation accumulated
subsequent to the effective date of its S election. Distributions in excess of
the accumulated adjustments account are treated as taxable dividends to the
extent that the corporation has "subchapter C earnings and profits," which
includes any earnings and profits accumulated by a corporation prior to the date
an S corporation election is effective, reduced by any distributions that are
treated as having been made out of subchapter C earnings and profits.
Distributions in excess of the accumulated adjustments account and subchapter C
earnings and profits are treated as a return of capital to the extent of a
shareholder's basis in his stock, and are treated as gain from the sale or
exchange of property to the extent the distributions exceed such basis.
 
    A corporation that operates as a C corporation and subsequently makes an
election to be treated as an S corporation may be subject to tax on the excess
of the aggregate fair market value of its assets over the aggregate adjusted tax
basis of its assets as of the first day it is treated as an S corporation (any
such excess is referred to as "net unrealized built-in gain"). This tax is not
immediately imposed at the time of conversion to S corporation status. Instead,
if a C corporation converts to S corporation status, it will be subject to tax
on its net unrealized built-in gain if and to the extent that is has a net
recognized built-in gain at any time during the next ten years. If an S
corporation is subject to tax on built-in gain, the gain is recognized and taxed
to the corporation at the highest corporate tax rate, and is then passed through
(after reduction for corporate taxes paid) and taxed to the shareholder. A
corporation's net recognized built-in gain for any tax year is the lesser of the
net amount of the corporation's recognized built-in gains and recognized
built-in losses for the tax year or what the corporation's taxable income would
have been for the year had it been a C corporation.
 
    Recognized built-in gain is defined as any gain recognized during the
recognition period (the 10 year period beginning with the first day as an S
corporation) on the disposition of any asset except to the extent the
corporation can establish that the asset was not held by the corporation on its
first day as an S corporation or that the gain recognized exceeds the excess of
the fair market value of the asset as of the first day the corporation was an S
corporation over the adjusted basis of the asset on that date. Similarly, the
term recognized built-in loss means any loss recognized during the recognition
period on the disposition of any asset to the extent that the S corporation
establishes that the asset was held at the beginning of its first day as an S
corporation and that the loss does not exceed the excess of the adjusted basis
of the asset as of the corporation's first day as an S corporation over the fair
market value of the asset as of that date.
 
    Under the rules relating to taxation of an S corporation's built-in gains,
if an S corporation owns a partnership interest on the first day of its first
taxable year as an S corporation, or transfers property which it held on the
first day of its first taxable year as an S corporation to a partnership during
the recognition period, a disposition of the partnership interest during the
recognition period may result in recognized built-in gain, taxable as described
above. Thus, an S corporation receiving Common Units in exchange for its assets
could be taxable on a sale or other disposition of those Common Units within the
recognition
 
                                       65
<PAGE>
period. In addition, sales or other dispositions by the Partnership of assets
(including inventory) which were contributed by an S corporation in exchange for
Common Units could result in the recognition of taxable built-in gain by the S
corporation.
 
LIMITED PARTNER STATUS
 
    Unitholders who have become limited partners of the Partnership will be
treated as partners of the Partnership for federal income tax purposes.
Moreover, the IRS has ruled that assignees of partnership interests who have not
been admitted to a partnership as partners, but who have the capacity to
exercise substantial dominion and control over the assigned partnership
interests, will be treated as partners for federal income tax purposes. On the
basis of this ruling, except as otherwise described herein, Counsel is of the
opinion that (a) assignees who have executed and delivered Transfer
Applications, and are awaiting admission as limited partners and (b) Unitholders
whose Common Units are held in street name or by a nominee and who have the
right to direct the nominee in the exercise of all substantive rights attendant
to the ownership of their Common Units will be treated as partners of the
Partnership for federal income tax purposes. As this ruling does not extend, on
its facts, to assignees of Common Units who are entitled to execute and deliver
Transfer Applications, but who fail to do so, Counsel's opinion does not extend
to them. Income, gain, deductions or losses would not appear to be reportable by
a Unitholder who is not a partner for federal income tax purposes, and any cash
distributions received by such a Unitholder would therefore be fully taxable as
ordinary income. These holders should consult their own tax advisors with
respect to their status as partners in the Partnership for federal income tax
purposes. A purchaser or other transferee of Common Units who does not execute
and deliver a Transfer Application may not receive certain federal income tax
information or reports furnished to record holders of Common Units unless the
Common Units are held in a nominee or street name account and the nominee or
broker has executed and delivered a Transfer Application with respect to such
Common Units.
 
    A beneficial owner of Common Units whose Common Units have been transferred
to a short seller to complete a short sale would appear to lose his status as a
partner with respect to such Common Units for federal income tax purposes. See
"--Tax Treatment of Operations--Treatment of Short Sales."
 
TAX CONSEQUENCES OF UNIT OWNERSHIP
 
    FLOW-THROUGH OF TAXABLE INCOME
 
    No federal income tax will be paid by the Partnership. Instead, each
Unitholder will be required to report on his income tax return his allocable
share of the income, gains, losses and deductions of the Partnership without
regard to whether any cash distributions are received by such Unitholder.
Consequently, a Unitholder may be allocated income from the Partnership even if
he has not received a cash distribution. Each Unitholder will be required to
include in income his allocable share of Partnership income, gain, loss and
deduction for the taxable year of the Partnership ending with or within the
taxable year of the Unitholder.
 
    TREATMENT OF PARTNERSHIP DISTRIBUTIONS
 
    Distributions by the Partnership to a Unitholder generally will not be
taxable to the Unitholder for federal income tax purposes to the extent of his
tax basis in his Common Units immediately before the distribution. Cash
distributions in excess of a Unitholder's tax basis generally will be considered
to be gain from the sale or exchange of the Common Units, taxable in accordance
with the rules described under "--Disposition of Common Units" below. Any
reduction in a Unitholder's share of the Partnership's liabilities for which no
partner, including the General Partners, bears the economic risk of loss
("nonrecourse liabilities") will be treated as a distribution of cash to that
Unitholder. To the extent that Partnership distributions cause a Unitholder's
"at risk" amount to be less than zero at the end of any
 
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taxable year, he must recapture any losses deducted in previous years. See
"--Limitations on Deductibility of Partnership Losses."
 
    A decrease in a Unitholder's percentage interest in the Partnership because
of the issuance by the Partnership of additional Common Units will decrease such
Unitholder's share of nonrecourse liabilities of the Partnership, and thus will
result in a corresponding deemed distribution of cash. A non-pro rata
distribution of money or property may result in ordinary income to a Unitholder,
regardless of his tax basis in his Common Units, if such distribution reduces
the Unitholder's share of the Partnership's "unrealized receivables" (including
depreciation recapture) and/or substantially appreciated "inventory items" (both
as defined in Section 751 of the Code) (collectively, "Section 751 Assets"). To
that extent, the Unitholder will be treated as having been distributed his
proportionate share of the Section 751 Assets and having exchanged such assets
with the Partnership in return for the non-pro rata portion of the actual
distribution made to him. This latter deemed exchange will generally result in
the Unitholder's realization of ordinary income under Section 751(b) of the
Code. Such income will equal the excess of (1) the non-pro rata portion of such
distribution over (2) the Unitholder's tax basis for the share of such Section
751 Assets deemed relinquished in the exchange.
 
    LIMITATIONS ON DEDUCTIBILITY OF PARTNERSHIP LOSSES
 
    The deduction by a Unitholder of his share of Partnership losses will be
limited to the tax basis in his Units and, in the case of an individual
Unitholder or a corporate Unitholder (if more than 50% of the value of its stock
is owned directly or indirectly by five or fewer individuals or certain
tax-exempt organizations), to the amount for which the Unitholder is considered
to be "at risk" with respect to the Partnership's activities, if that is less
than the Unitholder's tax basis. A Unitholder must recapture losses deducted in
previous years to the extent that Partnership distributions cause the
Unitholder's at risk amount to be less than zero at the end of any taxable year.
Losses disallowed to a Unitholder or recaptured as a result of these limitations
will carry forward and will be allowable to the extent that the Unitholder's tax
basis or at risk amount (whichever is the limiting factor) is subsequently
increased. Upon the taxable disposition of a Unit, any gain recognized by a
Unitholder can be offset by losses that were previously suspended by the at risk
limitation but may not be offset by losses suspended by the basis limitation.
Any excess loss (above such gain) previously suspended by the at risk or basis
limitations is no longer deductible.
 
    In general, a Unitholder will be at risk to the extent of the tax basis of
his Units, excluding any portion of that basis attributable to his share of
Partnership nonrecourse liabilities, reduced by any amount of money the
Unitholder borrows to acquire or hold his Units if the lender of such borrowed
funds owns an interest in the Partnership, is related to such a person or can
look only to Units for repayment. A Unitholder's at risk amount will increase or
decrease as the tax basis of the Unitholder's Units increases or decreases
(other than tax basis increases or decreases attributable to increases or
decreases in his share of Partnership nonrecourse liabilities).
 
    The passive loss limitations generally provide that individuals, estates,
trusts and certain closely-held corporations and personal service corporations
can deduct losses from passive activities (generally, activities in which the
taxpayer does not materially participate) only to the extent of the taxpayer's
income from those passive activities. The passive loss limitations are applied
separately with respect to each publicly-traded partnership such as the
Partnership. Consequently, any passive losses generated by the Partnership will
only be available to offset future income generated by the Partnership and will
not be available to offset income from other passive activities or investments
(including other publicly-traded partnerships) or salary or active business
income. Passive losses which are not deductible because they exceed a
Unitholder's income generated by the Partnership may be deducted in full when he
disposes of his entire investment in the Partnership in a fully taxable
transaction to an unrelated party. The passive activity loss rules are applied
after other applicable limitations on deductions such as the at risk rules and
the basis limitation.
 
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    LIMITATIONS ON INTEREST DEDUCTIONS
 
    The deductibility of a non-corporate taxpayer's "investment interest
expense" is generally limited to the amount of such taxpayer's "net investment
income." The IRS has announced that Treasury Regulations will be issued which
characterize net passive income from a publicly-traded Partnership as investment
income for purposes of the limitations on the deductibility of investment
interest. In addition, the Unitholder's share of the Partnership's portfolio
income will be treated as investment income. Investment interest expense
includes (i) interest on indebtedness properly allocable to property held for
investment, (ii) the Partnership's interest expense attributed to portfolio
income, and (iii) the portion of interest expense incurred to purchase or carry
an interest in a passive activity to the extent attributable to portfolio
income. The computation of a Unitholder's investment interest expense will take
into account interest on any margin account borrowing or other loan incurred to
purchase or carry a Unit. Net investment income includes gross income from
property held for investment and amounts treated as portfolio income pursuant to
the passive loss rules less deductible expenses (other than interest) directly
connected with the production of investment income, but generally does not
include gains attributable to the disposition of property held for investment.
 
ALLOCATION OF PARTNERSHIP INCOME, GAIN, LOSS AND DEDUCTION
 
    In general, if the Partnership has a net profit, items of income, gain, loss
and deduction will be allocated among the General Partners and the Unitholders
in accordance with their respective percentage interests in the Partnership. At
any time that distributions are made to the Common Units and not to the
Subordinated Units, or that Incentive Distributions are made to the General
Partners, gross income will be allocated to the recipients to the extent of such
distributions. If the Partnership has a net loss, items of income, gain, loss
and deduction will generally be allocated first, to the General Partners and the
Unitholders in accordance with their respective Percentage Interests to the
extent of their positive capital accounts (as maintained under the Partnership
Agreement) and, second, to the General Partners.
 
    As required by Section 704(c) of the Code and as permitted by Regulations
thereunder, certain items of Partnership income, deduction, gain and loss will
be allocated to account for the difference between the tax basis and fair market
value of property contributed to the Partnership by each of the General Partners
or any other person contributing property to the Partnership ("Contributed
Property"). The effect of these allocations will be to cause a property
contributor to recognize any built-in tax gain (or loss) over the period of time
during which the Partnership claims depreciation or amortization deductions with
respect to the contributed property, or upon disposition of such property.
Similar rules permit the Partnership to adjust the book values of Partnership
property whenever property is contributed to or distributed by the Partnership
(a "Book-Up"). In addition, certain items of recapture income will be allocated
to the extent possible to the partner allocated the deduction giving rise to the
treatment of such gain as recapture income in order to minimize the recognition
of ordinary income by some Unitholders, but these allocations may not be
respected under current law. Finally, although the Partnership does not expect
that its operations will result in the creation of negative capital accounts, if
negative capital accounts nevertheless result, items of Partnership income and
gain will be allocated in an amount and manner sufficient to eliminate the
negative balance as quickly as possible.
 
    Regulations provide that an allocation of items of partnership income, gain,
loss or deduction, other than an allocation required by Section 704(c) of the
Code to eliminate the disparity between a partner's "book" capital account
(credited with the fair market value of Contributed Property or adjusted by a
Book-Up) and "tax" capital account (credited with the tax basis of Contributed
Property and unchanged in a Book-Up) (the "Book-Tax Disparity"), will generally
be given effect for federal income tax purposes in determining a partner's
distributive share of an item of income, gain, loss or deduction only if the
allocation has substantial economic effect. In any other case, a partner's
distributive share of an item will be determined on the basis of the partner's
interest in the partnership, which will be determined by taking
 
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into account all the facts and circumstances, including the partner's relative
contributions to the partnership, the interests of the partners in economic
profits and losses, the interest of the partners in cash flow and other
nonliquidating distributions and rights of the partners to distributions of
capital upon liquidation.
 
    Counsel is of the opinion that, with the exception of the allocations of
recapture income discussed above, allocations under the Partnership Agreement
will be given effect for federal income tax purposes in determining a partner's
distributive share of an item of income, gain, loss or deduction.
 
TAX TREATMENT OF OPERATIONS
 
    ACCOUNTING METHOD AND TAXABLE YEAR
 
    The Partnership uses the year ending December 31 as its taxable year and has
adopted the accrual method of accounting for federal income tax purposes. Each
Unitholder will be required to include in income his allocable share of
Partnership income, gain, loss and deduction for the taxable year of the
Partnership ending within or with the taxable year of the Unitholder. In
addition, a Unitholder who has a taxable year ending on a date other than
December 31 and who disposes of all of his Units following the close of the
Partnership's taxable year but before the close of his taxable year must include
his allocable share of Partnership income, gain, loss and deduction in income
for his taxable year with the result that he will be required to report in
income for his taxable year his distributive share of more than one year of
Partnership income, gain, loss and deduction. See "--Disposition of Common
Units--Allocations Between Transferors and Transferees."
 
    INITIAL TAX BASIS, DEPRECIATION AND AMORTIZATION
 
    The tax basis of the assets of the Partnership will be used for purposes of
computing depreciation and cost recovery deductions and, ultimately, gain or
loss on the disposition of such assets. The Partnership assets will initially
have an aggregate tax basis equal to the tax basis of the assets in the
possession of the General Partners or other contributor immediately prior to
their contributions to the Partnership plus the amount of gain, if any,
recognized by the General Partners or other contributor in connection with their
contribution to the Partnership. The federal income tax burden associated with
the difference between the fair market value of property contributed to the
Partnership and the tax basis established for such property will be borne by the
contributor of such property. See "--Allocation of Partnership Income, Gain,
Loss and Deduction."
 
    To the extent allowable, the Partnership may elect to use the depreciation
and cost recovery methods that will result in the largest depreciation
deductions in the early years of the Partnership. The Partnership will not be
entitled to any amortization deductions with respect to goodwill conveyed to the
Partnership on formation. Property subsequently acquired or constructed by the
Partnership may be depreciated using accelerated methods permitted by the Code.
 
    If the Partnership disposes of depreciable property by sale, foreclosure, or
otherwise, all or a portion of any gain (determined by reference to the amount
of depreciation previously deducted and the nature of the property) may be
subject to the recapture rules and taxed as ordinary income rather than capital
gain. Similarly, a partner who has taken cost recovery or depreciation
deductions with respect to property owned by the Partnership may be required to
recapture such deductions as ordinary income upon a sale of his interest in the
Partnership. See "--Allocation of Partnership Income, Gain, Loss and Deduction"
and "--Disposition of Common Units--Recognition of Gain or Loss."
 
    Costs incurred in organizing the Partnership may be amortized over any
period selected by the Partnership not shorter than 60 months. The costs
incurred in promoting the issuance of Units (i.e. syndication expenses) must be
capitalized and cannot be deducted currently, ratably or upon termination of the
Partnership. There are uncertainties regarding the classification of costs as
organization expenses,
 
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which may be amortized, and as syndication expenses, which may not be amortized.
Under the Treasury Regulations, the underwriting discounts and commissions would
be treated as a syndication cost.
 
    SECTION 754 ELECTION
 
    The Partnership has made the election permitted by Section 754 of the Code.
That election is irrevocable without the consent of the IRS. The election
generally permits the Partnership to adjust a Common Unit purchaser's tax basis
in the Partnership's assets ("inside basis") pursuant to Section 743(b) of the
Code to reflect his purchase price. The Section 743(b) adjustment belongs to the
purchaser and not to other partners. (For purposes of this discussion, a
partner's inside basis in the Partnership's assets will be considered to have
two components: (1) his share of the Partnership's tax basis in such assets
("Common Basis") and (2) his Section 743(b) adjustment to that basis.)
 
    Proposed Treasury Regulation Section 1.168-2(n) generally requires the
Section 743(b) adjustment attributable to recovery property to be depreciated as
if the total amount of such adjustment were attributable to newly-acquired
recovery property placed in service when the purchaser acquires the Unit.
Similarly, newly issued proposed Treasury regulations promulgated under Section
197 indicate that the Section 743(b) adjustment attributable to an amortizable
Section 197 intangible should be treated as a newly-acquired asset placed in
service in the month when the purchaser acquires the Unit. Under Treasury
Regulation Section 1.167(c)-1(a)(6), a Section 743(b) adjustment attributable to
property subject to depreciation under Section 167 of the Code rather than cost
recovery deductions under Section 168 is generally required to be depreciated
using either the straight-line method or the 150% declining balance method. The
depreciation and amortization methods and useful lives associated with the
Section 743(b) adjustment, therefore, may differ from the methods and useful
lives generally used to depreciate the Common Basis in such properties. Pursuant
to the Partnership Agreement, the Partnership is authorized to adopt a
convention to preserve the uniformity of Units even if such convention is not
consistent with Treasury Regulation Sections 1.167(c)-1(a)(6), Proposed Treasury
Regulation Section 1.168-2(n) or the Section 197 proposed Treasury regulations.
See "--Uniformity of Units."
 
    Although Counsel is unable to opine as to the validity of such an approach,
the Partnership intends to depreciate the portion of a Section 743(b) adjustment
attributable to unrealized appreciation in the value of Contributed Property (to
the extent of any unamortized Book-Tax Disparity) using a rate of depreciation
or amortization derived from the depreciation or amortization method and useful
life applied to the Common Basis of such property, or treat that portion as
non-amortizable to the extent attributable to property the Common Basis of which
is not amortizable, despite its inconsistency with Proposed Treasury Regulation
Section 1.168-2(n), Treasury Regulation Section 1.167(c)-1(a)(6) (neither of
which is expected to directly apply to a material portion of the Partnership's
assets) or the Section 197 proposed Treasury regulations. To the extent such
Section 743(b) adjustment is attributable to appreciation in value in excess of
the unamortized Book-Tax Disparity, the Partnership will apply the rules
described in the Regulations and legislative history. If the Partnership
determines that such position cannot reasonably be taken, the Partnership may
adopt a depreciation or amortization convention under which all purchasers
acquiring Units in the same month would receive depreciation or amortization,
whether attributable to Common Basis or Section 743(b) adjustment, based upon
the same applicable rate as if they had purchased a direct interest in the
Partnership's assets. Such an aggregate approach may result in lower annual
depreciation or amortization deductions than would otherwise be allowable to
certain Unitholders. See "--Uniformity of Units."
 
    The allocation of the Section 743(b) adjustment must be made in accordance
with the Code. The IRS may seek to reallocate some or all of any Section 743(b)
adjustment not so allocated by the Partnership to goodwill which, as an
intangible asset, would be amortizable over a longer period of time than the
Partnership's tangible assets.
 
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<PAGE>
    A Section 754 election is advantageous if the transferee's tax basis in his
Units is higher than such Units' share of the aggregate tax basis to the
Partnership of the Partnership's assets immediately prior to the transfer. In
such a case, as a result of the election, the transferee would have a higher tax
basis in his share of the Partnership's assets for purposes of calculating,
among other items, his depreciation and depletion deductions and his share of
any gain or loss on a sale of the Partnership's assets. Conversely, a Section
754 election is disadvantageous if the transferee's tax basis in such Units is
lower than such Unit's share of the aggregate tax basis of the Partnership's
assets immediately prior to the transfer. Thus, the fair market value of the
Units may be affected either favorably or adversely by the election.
 
    The calculations involved in the Section 754 election are complex and will
be made by the Partnership on the basis of certain assumptions as to the value
of Partnership assets and other matters. There is no assurance that the
determinations made by the Partnership will not be successfully challenged by
the IRS and that the deductions resulting from them will not be reduced or
disallowed altogether. Should the IRS require a different basis adjustment to be
made, and should, in the Partnership's opinion, the expense of compliance exceed
the benefit of the election, the Partnership may seek permission from the IRS to
revoke the Section 754 election for the Partnership. If such permission is
granted, a subsequent purchaser of Units may be allocated more income than he
would have been allocated had the election not been revoked.
 
    ALTERNATIVE MINIMUM TAX
 
    Each Unitholder will be required to take into account his distributive share
of any items of Partnership income, gain, deduction or loss for purposes of the
alternative minimum tax.
 
    A Unitholder's alternative minimum taxable income derived from the
Partnership may be higher than his share of Partnership net income because the
Partnership may use accelerated methods of depreciation for purposes of
computing federal taxable income or loss. The minimum tax rate for non-corporate
taxpayers is 26% on the first $175,000 of alternative minimum taxable income in
excess of the exemption amount and 28% on any additional alternative minimum
taxable income. Prospective Unitholders should consult with their tax advisors
as to the impact of an investment in Units on their liability for the
alternative minimum tax.
 
    VALUATION OF PARTNERSHIP PROPERTY AND BASIS OF PROPERTIES
 
    The federal income tax consequences of the acquisition, ownership and
disposition of Units will depend in part on estimates by the Partnership of the
relative fair market values, and determinations of the initial tax bases, of the
assets of the Partnership. Although the Partnership may from time to time
consult with professional appraisers with respect to valuation matters, many of
the relative fair market value estimates will be made by the Partnership. These
estimates and determinations of basis are subject to challenge and will not be
binding on the IRS or the courts. If the estimates of fair market value or
determinations of basis are subsequently found to be incorrect, the character
and amount of items of income, gain, loss or deductions previously reported by
Unitholders might change, and Unitholders might be required to adjust their tax
liability for prior years.
 
    TREATMENT OF SHORT SALES
 
    A Unitholder whose Units are loaned to a "short seller" to cover a short
sale of Units may be considered as having disposed of ownership of those Units.
If so, he would no longer be a partner with respect to those Units during the
period of the loan and may recognize gain or loss from the disposition. As a
result, during this period, any Partnership income, gain, deduction or loss with
respect to those Units would not be reportable by the Unitholder, any cash
distributions received by the Unitholder with respect to those Units would be
fully taxable and all of such distributions would appear to be treated as
ordinary income. Unitholders desiring to assure their status as partners and
avoid the risk of gain recognition should modify any applicable brokerage
account agreements to prohibit their brokers from borrowing their Units.
 
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<PAGE>
DISPOSITION OF COMMON UNITS
 
    RECOGNITION OF GAIN OR LOSS
 
    Gain or loss will be recognized on a sale of Units equal to the difference
between the amount realized and the Unitholder's tax basis for the Units sold. A
Unitholder's amount realized will be measured by the sum of the cash or the fair
market value of other property received plus his share of Partnership
nonrecourse liabilities. Because the amount realized includes a Unitholder's
share of Partnership nonrecourse liabilities, the gain recognized on the sale of
Units could result in a tax liability in excess of any cash received from such
sale.
 
    Under the 1997 Act, a taxpayer is treated as having sold an "appreciated"
partnership interest (one in which gain would be recognized if such interest
were sold) if such taxpayer or related persons entered into one or more
positions with respect to the same or substantially identical property which,
for some period, substantially eliminated both the risk of loss and opportunity
for gain on the appreciated financial position (including selling "short against
the box" transactions). Unitholders should consult with their tax advisers in
the event they are considering entering into a short sale transaction or any
other risk arbitrage transaction involving their Common Units.
 
    Prior Partnership distributions in excess of cumulative net taxable income
in respect of a Common Unit which decreased a Unitholder's tax basis in such
Common Unit will, in effect, become taxable income if the Common Unit is sold at
a price greater than the Unitholder's tax basis in such Common Unit, even if the
price is less than his original cost.
 
    Should the IRS successfully contest the convention used by the Partnership
to amortize only a portion of the Section 743(b) adjustment (described under
"--Tax Treatment of Operations--Section 754 Election") attributable to an
amortizable Section 197 intangible after a sale by the General Partners of
Units, a Unitholder could realize additional gain from the sale of Units than
had such convention been respected. In that case, the Unitholder may have been
entitled to additional deductions against income in prior years but may be
unable to claim them, with the result to him of greater overall taxable income
than appropriate. Counsel is unable to opine as to the validity of the
convention but believes such a contest by the IRS to be unlikely because a
successful contest could result in substantial additional deductions to other
Unitholders.
 
    Gain or loss recognized by a Unitholder (other than a "dealer" in Common
Units) on the sale or exchange of a Unit held for more than one year will
generally be taxable as long-term capital gain or loss, with the tax rate on a
long-term capital gain depending upon whether the Unitholder held Common Units
for more than 18 months. A portion of this gain or loss (which could be
substantial), however, will be separately computed and taxed as ordinary income
or loss under Section 751 of the Code to the extent attributable to assets
giving rise to depreciation recapture or other "unrealized receivables" or to
inventory owned by the Partnership. The term "unrealized receivables" includes
potential recapture items, including depreciation recapture. Ordinary income
attributable to unrealized receivables, inventory and depreciation recapture may
exceed net taxable gain realized upon the sale of the Unit and may be recognized
even if there is a net taxable loss realized on the sale of the Unit. Thus, a
Unitholder may recognize both ordinary income and a capital loss upon a
disposition of Units. Net capital loss may offset no more than $3,000 of
ordinary income in the case of individuals and may only be used to offset
capital gain in the case of corporations.
 
    The IRS has ruled that a partner who acquires interests in a Partnership in
separate transactions must combine those interests and maintain a single
adjusted tax basis. Upon a sale or other disposition of less than all of such
interests, a portion of that tax basis must be allocated to the interests sold
using an "equitable apportionment" method. The ruling is unclear as to how the
holding period of these interests is determined once they are combined. If this
ruling is applicable to the holders of Common Units, a Common Unitholder will be
unable to select high or low basis Common Units to sell as would be the case
with corporate stock. It is not clear whether the ruling applies to the
Partnership, because, similar to
 
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<PAGE>
corporate stock, interests in the Partnership are evidenced by separate
certificates. Accordingly, Counsel is unable to opine as to the effect such
ruling will have on the Unitholders. A Unitholder considering the purchase of
additional Common Units or a sale of Common Units purchased in separate
transactions should consult his tax advisor as to the possible consequences of
such ruling.
 
    ALLOCATIONS BETWEEN TRANSFERORS AND TRANSFEREES
 
    In general, the Partnership's taxable income and losses will be determined
annually, will be prorated on a monthly basis and will be subsequently
apportioned among the Unitholders in proportion to the number of Units owned by
each of them as of the opening of the New York Stock Exchange on the first
business day of the month (the "Allocation Date"). However, gain or loss
realized on a sale or other disposition of Partnership assets other than in the
ordinary course of business will be allocated among the Unitholders on the
Allocation Date in the month in which that gain or loss is recognized. As a
result, a Unitholder transferring Common Units in the open market may be
allocated income, gain, loss and deduction accrued after the date of transfer.
 
    The use of this method may not be permitted under existing Treasury
Regulations. Accordingly, Counsel is unable to opine on the validity of this
method of allocating income and deductions between the transferors and the
transferees of Units. If this method is not allowed under the Treasury
Regulations (or only applies to transfers of less than all of the Unitholder's
interest), taxable income or losses of the Partnership might be reallocated
among the Unitholders. The Partnership is authorized to revise its method of
allocation between transferors and transferees (as well as among partners whose
interests otherwise vary during a taxable period) to conform to a method
permitted under future Treasury Regulations.
 
    A Unitholder who owns Units at any time during a quarter and who disposes of
such Units prior to the record date set for a cash distribution with respect to
such quarter will be allocated items of Partnership income, gain, loss and
deductions attributable to such quarter but will not be entitled to receive that
cash distribution.
 
    NOTIFICATION REQUIREMENTS
 
    A Unitholder who sells or exchanges Units is required to notify the
Partnership in writing of that sale or exchange within 30 days after the sale or
exchange and in any event by no later than January 15 of the year following the
calendar year in which the sale or exchange occurred. The Partnership is
required to notify the IRS of that transaction and to furnish certain
information to the transferor and transferee. However, these reporting
requirements do not apply with respect to a sale by an individual who is a
citizen of the United States and who effects the sale or exchange through a
broker. Additionally, a transferor and a transferee of a Unit will be required
to furnish statements to the IRS, filed with their income tax returns for the
taxable year in which the sale or exchange occurred, that set forth the amount
of the consideration received for the Unit that is allocated to goodwill or
going concern value of the Partnership. Failure to satisfy these reporting
obligations may lead to the imposition of substantial penalties.
 
    CONSTRUCTIVE TERMINATION
 
    The Partnership and the Operating Partnership will be considered to have
been terminated if there is a sale or exchange of 50% or more of the total
interests in Partnership capital and profits within a 12-month period. A
termination results in the closing of a Partnership's taxable year for all
partners and the Partnership will be deemed to have conveyed all its assets and
liabilities to a newly formed partnership in exchange for all the interests in
such partnership and then the Partnership will be deemed to have liquidated and
to have distributed to its partners the interests in this newly formed
partnership. A termination of the Partnership will cause a termination of the
Operating Partnership and any Subsidiary
 
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Partnership. Such a termination could also result in penalties or loss of tax
basis adjustments under Section 754 of the Code if the Partnership were unable
to determine that the termination had occurred.
 
    In the case of a Unitholder reporting on a taxable year other than a fiscal
year ending December 31, the closing of the tax year of the Partnership may
result in more than 12 months' taxable income or loss of the Partnership being
includable in his taxable income for the year of termination. In addition, each
Unitholder will realize taxable gain to the extent that any money deemed as a
result of the termination to have been distributed to him exceeds the adjusted
tax basis of his Units. New tax elections required to be made by the
Partnership, including a new election under Section 754 of the Code, must be
made subsequent to a constructive termination. A termination could also result
in a deferral of Partnership deductions for depreciation. Finally, a termination
might either accelerate the application of, or subject the Partnership to, any
tax legislation enacted prior to the termination.
 
    ENTITY-LEVEL COLLECTIONS
 
    If the Partnership is required or elects under applicable law to pay any
federal, state or local income tax on behalf of any Unitholder or any General
Partner or any former Unitholder, the Partnership is authorized to pay those
taxes from Partnership funds. Such payment, if made, will be treated as a
distribution of cash to the partner on whose behalf the payment was made. If the
payment is made on behalf of a person whose identity cannot be determined, the
Partnership is authorized to treat the payment as a distribution to current
Unitholders. The Partnership is authorized to amend the Partnership Agreement in
the manner necessary to maintain uniformity of intrinsic tax characteristics of
Units and to adjust subsequent distributions, so that after giving effect to
such distributions, the priority and characterization of distributions otherwise
applicable under the Partnership Agreement is maintained as nearly as is
practicable. Payments by the Partnership as described above could give rise to
an overpayment of tax on behalf of an individual partner in which event the
partner could file a claim for credit or refund.
 
UNIFORMITY OF UNITS
 
    Because the Partnership cannot match transferors and transferees of Units,
uniformity of the economic and tax characteristics of the Units to a purchaser
of such Units must be maintained. In the absence of uniformity, compliance with
a number of federal income tax requirements, both statutory and regulatory,
could be substantially diminished. A lack of uniformity can result from a
literal application of Proposed Treasury Regulation Section 1.168-2(n), Treasury
Regulation Section 1.167(c)-1(a)(6) and proposed Treasury regulations recently
promulgated under Section 197. Any non-uniformity could have a negative impact
on the value of the Units. See "--Tax Treatment of Operations--Section 754
Election."
 
    The Partnership intends to depreciate the portion of a Section 743(b)
adjustment attributable to unrealized appreciation in the value of contributed
property or adjusted property (to the extent of any unamortized Book-Tax
Disparity) using a rate of depreciation or amortization derived from the
depreciation or amortization method and useful life applied to the Common Basis
of such property, or treat that portion as nonamortizable, to the extent
attributable to property the Common Basis of which is not amortizable, despite
its inconsistency with Proposed Treasury Regulation Section 1.168-2(n) and
Treasury Regulation Section 1.167(c)-1(a)(6) (neither of which is expected to
directly apply to a material portion of the Partnership's assets) or proposed
Treasury regulations recently promulgated under Section 197. See "--Tax
Treatment of Operations--Section 754 Election." To the extent such Section
743(b) adjustment is attributable to appreciation in value in excess of the
unamortized Book-Tax Disparity, the Partnership will apply the rules described
in the Regulations and legislative history. If the Partnership determines that
such a position cannot reasonably be taken, the Partnership may adopt a
depreciation and amortization convention under which all purchasers acquiring
Units in the same month would receive depreciation and amortization deductions,
whether attributable to Common Basis or Section 743(b) basis, based upon the
same applicable rate as if they had purchased a direct interest in the
Partnership's property. If such an aggregate approach is adopted, it may result
in lower annual depreciation and amortization deductions
 
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<PAGE>
than would otherwise be allowable to certain Unitholders and risk the loss of
depreciation and amortization deductions not taken in the year that such
deductions are otherwise allowable. This convention will not be adopted if the
Partnership determines that the loss of depreciation and amortization deductions
will have a material adverse effect on the Unitholders. If the Partnership
chooses not to utilize this aggregate method, the Partnership may use any other
reasonable depreciation and amortization convention to preserve the uniformity
of the intrinsic tax characteristics of any Units that would not have a material
adverse effect on the Unitholders. The IRS may challenge any method of
depreciating the Section 743(b) adjustment described in this paragraph. If such
a challenge were sustained, the uniformity of Units might be affected, and the
gain from the sale of Units might be increased without the benefit of additional
deductions. See "--Disposition of Common Units--Recognition of Gain or Loss."
 
    TAX-EXEMPT ORGANIZATIONS AND CERTAIN OTHER INVESTORS
 
    Ownership of Units by employee benefit plans, other tax-exempt
organizations, nonresident aliens, foreign corporations, other foreign persons
and regulated investment companies raises issues unique to such persons and, as
described below, may have substantially adverse tax consequences. Employee
benefit plans and most other organizations exempt from federal income tax
(including individual retirement accounts ("IRAs") and other retirement plans)
are subject to federal income tax on unrelated business taxable income.
Virtually all of the taxable income derived by such an organization from the
ownership of a Unit will be unrelated business taxable income and thus will be
taxable to such a Unitholder.
 
    A regulated investment company or "mutual fund" is required to derive 90% or
more of its gross income from interest, dividends, gains from the sale of stocks
or securities or foreign currency or certain related sources. It is not
anticipated that any significant amount of the Partnership's gross income will
include that type of income.
 
    Non-resident aliens and foreign corporations, trusts or estates which hold
Units will be considered to be engaged in business in the United States on
account of ownership of Units. As a consequence they will be required to file
federal tax returns in respect of their share of Partnership income, gain, loss
or deduction and pay federal income tax at regular rates on any net income or
gain. Generally, a Partnership is required to pay a withholding tax on the
portion of the Partnership's income which is effectively connected with the
conduct of a United States trade or business and which is allocable to the
foreign partners, regardless of whether any actual distributions have been made
to such partners. However, under rules applicable to publicly-traded
partnerships, the Partnership will withhold (currently at the rate of 39.6%) on
actual cash distributions made quarterly to foreign Unitholders. Each foreign
Unitholder must obtain a taxpayer identification number from the IRS and submit
that number to the Transfer Agent of the Partnership on a Form W-8 in order to
obtain credit for the taxes withheld. A change in applicable law may require the
Partnership to change these procedures.
 
    Because a foreign corporation which owns Units will be treated as engaged in
a United States trade or business, such a corporation may be subject to United
States branch profits tax at a rate of 30%, in addition to regular federal
income tax, on its allocable share of the Partnership's income and gain (as
adjusted for changes in the foreign corporation's "U.S. net equity") which are
effectively connected with the conduct of a United States trade or business.
That tax may be reduced or eliminated by an income tax treaty between the United
States and the country with respect to which the foreign corporate Unitholder is
a "qualified resident." In addition, such a Unitholder is subject to special
information reporting requirements under Section 6038C of the Code.
 
    Under a ruling of the IRS a foreign Unitholder who sells or otherwise
disposes of a Unit will be subject to federal income tax on gain realized on the
disposition of such Unit to the extent that such gain is attributable to United
States property of the Partnership.
 
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ADMINISTRATIVE MATTERS
 
    PARTNERSHIP INFORMATION RETURNS AND AUDIT PROCEDURES
 
    The Partnership intends to furnish to each Unitholder, within 75 days after
the close of each calendar year, certain tax information, including a Schedule
K-1, which sets forth each Unitholder's allocable share of the Partnership's
income, gain, loss and deduction for the preceding Partnership taxable year. In
preparing this information, which will generally not be reviewed by counsel, the
Partnership will use various accounting and reporting conventions, some of which
have been mentioned in the previous discussion, to determine each Unitholder's
allocable share of income, gain, loss and deduction. There is no assurance that
any of those conventions will yield a result which conforms to the requirements
of the Code, regulations or administrative interpretations of the IRS. The
Partnership cannot assure prospective Unitholders that the IRS will not
successfully contend in court that such accounting and reporting conventions are
impermissible. Any such challenge by the IRS could negatively affect the value
of the Units.
 
    The federal income tax information returns filed by the Partnership may be
audited by the IRS. Adjustments resulting from any such audit may require each
Unitholder to adjust a prior year's tax liability, and possibly may result in an
audit of the Unitholder's own return. Any audit of a Unitholder's return could
result in adjustments of non-Partnership as well as Partnership items.
 
    Partnerships generally are treated as separate entities for purposes of
federal tax audits, judicial review of administrative adjustments by the IRS and
tax settlement proceedings. The tax treatment of partnership items of income,
gain, loss and deduction are determined in a partnership proceeding rather than
in separate proceedings with the partners. The Code provides for one partner to
be designated as the "Tax Matters Partner" for these purposes. The Partnership
Agreement appoints the Managing General Partner as the Tax Matters Partner of
the Partnership.
 
    The Tax Matters Partner will make certain elections on behalf of the
Partnership and Unitholders and can extend the statute of limitations for
assessment of tax deficiencies against Unitholders with respect to Partnership
items. The Tax Matters Partner may bind a Unitholder with less than a 1% profits
interest in the Partnership to a settlement with the IRS unless that Unitholder
elects, by filing a statement with the IRS, not to give such authority to the
Tax Matters Partner. The Tax Matters Partner may seek judicial review (by which
all the Unitholders are bound) of a final partnership administrative adjustment
and, if the Tax Matters Partner fails to seek judicial review, such review may
be sought by any Unitholder having at least a 1% interest in the profits of the
Partnership and by the Unitholders having in the aggregate at least a 5% profits
interest. However, only one action for judicial review will go forward, and each
Unitholder with an interest in the outcome may participate.
 
    A Unitholder must file a statement with the IRS identifying the treatment of
any item on his federal income tax return that is not consistent with the
treatment of the item on the Partnership's return. Intentional or negligent
disregard of the consistency requirement may subject a Unitholder to substantial
penalties. Partners in electing large partnerships are required to treat all
Partnership items in a manner consistent with the Partnership return. The
Partnership will elect to be treated as an electing large partnership.
 
    Under the reporting provisions of the 1997 Act, each partner of an electing
large partnership will take into account separately his share of the following
items, determined at the partnership level: (1) taxable income or loss from
passive loss limitation activities; (2) taxable income or loss from other
activities (such as portfolio income or loss); (3) net capital gains to the
extent allocable to passive loss limitation activities and other activities; (4)
tax exempt interest; (5) a net alternative minimum tax adjustment separately
computed for passive loss limitation activities and other activities; (6)
general credits; (7) low-income housing credit; (8) rehabilitation credit; (9)
foreign income taxes; (10) credit for producing fuel from a nonconventional
source; and (11) any other items the Secretary of Treasury deems appropriate.
 
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<PAGE>
    The 1997 Act also makes a number of changes to the tax compliance and
administrative rules relating to partnerships. One provision requires that each
partner in an electing large partnership, such as the Partnership, take into
account his share of any adjustments to partnership items in the year such
adjustments are made. Alternatively, under the 1997 Act, an electing large
partnership can elect to or, in some circumstances, can be required to directly
pay the tax resulting from any such adjustments. Moreover, a partnership (and
not its partners) is liable for any interest and penalties that result from a
partnership adjustment. In either case, therefore, Unitholders could bear
significant economic burdens associated with tax adjustments relating to periods
predating their acquisition of Units.
 
    NOMINEE REPORTING
 
    Persons who hold an interest in the Partnership as a nominee for another
person are required to furnish to the Partnership (a) the name, address and
taxpayer identification number of the beneficial owner and the nominee; (b)
whether the beneficial owner is (i) a person that is not a United States person,
(ii) a foreign government, an international organization or any wholly-owned
agency or instrumentality of either of the foregoing, or (iii) a tax-exempt
entity; (c) the amount and description of Units held, acquired or transferred
for the beneficial owner; and (d) certain information including the dates of
acquisitions and transfers, means of acquisitions and transfers, and acquisition
cost for purchases, as well as the amount of net proceeds from sales. Brokers
and financial institutions are required to furnish additional information,
including whether they are United States persons and certain information on
Units they acquire, hold or transfer for their own account. A penalty of $50 per
failure (up to a maximum of $100,000 per calendar year) is imposed by the Code
for failure to report such information to the Partnership. The nominee is
required to supply the beneficial owner of the Units with the information
furnished to the Partnership.
 
    REGISTRATION AS A TAX SHELTER
 
    The Code requires that "tax shelters" be registered with the Secretary of
the Treasury. The temporary Treasury Regulations interpreting the tax shelter
registration provisions of the Code are extremely broad. It is arguable that the
Partnership is not subject to the registration requirement on the basis that it
will not constitute a tax shelter. However, the Managing General Partner, as a
principal organizer of the Partnership, has registered the Partnership as a tax
shelter (I.D. No. 97071000067) with the Secretary of the Treasury in the absence
of assurance that the Partnership will not be subject to tax shelter
registration and in light of the substantial penalties which might be imposed if
registration is required and not undertaken. ISSUANCE OF THE REGISTRATION NUMBER
DOES NOT INDICATE THAT AN INVESTMENT IN THE PARTNERSHIP OR THE CLAIMED TAX
BENEFITS HAVE BEEN REVIEWED, EXAMINED OR APPROVED BY THE IRS. The Partnership
must furnish the registration number to the Unitholders, and a Unitholder who
sells or otherwise transfers a Unit in a subsequent transaction must furnish the
registration number to the transferee. The penalty for failure of the transferor
of a Unit to furnish the registration number to the transferee is $100 for each
such failure. The Unitholders must disclose the tax shelter registration number
of the Partnership on Form 8271 to be attached to the tax return on which any
deduction, loss or other benefit generated by the Partnership is claimed or
income of the Partnership is included. A Unitholder who fails to disclose the
tax shelter registration number on his return, without reasonable cause for that
failure, will be subject to a $250 penalty for each failure. Any penalties
discussed herein are not deductible for federal income tax purposes.
 
    ACCURACY-RELATED PENALTIES
 
    An additional tax equal to 20% of the amount of any portion of an
underpayment of tax which is attributable to one or more of certain listed
causes, including negligence or disregard of rules or regulations, substantial
understatements of income tax and substantial valuation misstatements, is
imposed by the Code. No penalty will be imposed, however, with respect to any
portion of an underpayment if it is
 
                                       77
<PAGE>
shown that there was a reasonable cause for that portion and that the taxpayer
acted in good faith with respect to that portion.
 
    A substantial understatement of income tax in any taxable year exists if the
amount of the understatement exceeds the greater of 10% of the tax required to
be shown on the return for the taxable year or $5,000 ($10,000 for most
corporations). The amount of any understatement subject to penalty generally is
reduced if any portion is attributable to a position adopted on the return (i)
with respect to which there is, or was, "substantial authority" or (ii) as to
which there is a reasonable basis and the pertinent facts of such position are
disclosed on the return. Certain more stringent rules apply to "tax shelters," a
term that in this context does not appear to include the Partnership. If any
Partnership item of income, gain, loss or deduction included in the distributive
shares of Unitholders might result in such an "understatement" of income for
which no "substantial authority" exists, the Partnership must disclose the
pertinent facts on its return. In addition, the Partnership will make a
reasonable effort to furnish sufficient information for Unitholders to make
adequate disclosure on their returns to avoid liability for this penalty.
 
    A substantial valuation misstatement exists if the value of any property (or
the adjusted basis of any property) claimed on a tax return is 200% or more of
the amount determined to be the correct amount of such valuation or adjusted
basis. No penalty is imposed unless the portion of the underpayment attributable
to a substantial valuation misstatement exceeds $5,000 ($10,000 for most
corporations). If the valuation claimed on a return is 400% or more than the
correct valuation, the penalty imposed increases to 40%.
 
STATE, LOCAL AND OTHER TAX CONSIDERATIONS
 
    In addition to federal income taxes, Unitholders will be subject to other
taxes, such as state and local income taxes, unincorporated business taxes, and
estate, inheritance or intangible taxes that may be imposed by the various
jurisdictions in which the Partnership does business or owns property. Although
an analysis of those various taxes is not presented here, each prospective
Unitholder should consider their potential impact on his investment in the
Partnership. The Partnership currently owns property and conducts business in
the following states which currently impose a personal income tax: Alabama,
Arizona, Arkansas, California, Georgia, Illinois, Indiana, Kentucky, Maryland,
Mississippi, Missouri, New Hampshire, New Jersey, New Mexico, New York, North
Carolina, Ohio, Oklahoma, South Carolina, Tennessee, Utah, Vermont and Virginia.
A Unitholder will be required to file state income tax returns and to pay state
income taxes in some or all of these states and may be subject to penalties for
failure to comply with those requirements. In certain states, tax losses may not
produce a tax benefit in the year incurred (if, for example, the Partnership has
no income from sources within that state) and also may not be available to
offset income in subsequent taxable years. Some of the states may require the
Partnership, or the Partnership may elect, to withhold a percentage of income
from amounts to be distributed to a Unitholder who is not a resident of the
state. Withholding, the amount of which may be greater or less than a particular
Unitholder's income tax liability to the state, generally does not relieve the
non-resident Unitholder from the obligation to file an income tax return.
Amounts withheld may be treated as if distributed to Unitholders for purposes of
determining the amounts distributed by the Partnership. See "--Disposition of
Common Units--Entity-Level Collections."
 
    It is the responsibility of each Unitholder to investigate the legal and tax
consequences, under the laws of pertinent states and localities of his
investment in the Partnership. Accordingly, each prospective Unitholder should
consult, and must depend upon, his own tax counsel or other advisor with regard
to those matters. Further, it is the responsibility of each Unitholder to file
all state and local, as well as U.S. federal, tax returns that may be required
of such Unitholder. Counsel has not rendered an opinion on the state or local
tax consequences of an investment in the Partnership.
 
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<PAGE>
                         UNITS ELIGIBLE FOR FUTURE SALE
 
    The General Partners hold an aggregate of 6,597,619 Subordinated Units (all
of which will convert into Common Units at the end of the Subordination Period
and some of which may convert earlier). See "Cash Distribution
Policy--Distributions from Operating Surplus during Subordination Period." The
sale of these Units could have an adverse impact on the price of the Common
Units or on any trading market that may develop.
 
    The Common Units offered hereby will generally be freely transferable
without restriction or further registration under the Securities Act, other than
by an "affiliate" (as that term is defined in the Securities Act) of the
Partnership. The Common Units issuable to the General Partners upon conversion
of the Subordinated Units ("Restricted Units") may not be sold unless registered
under the Securities Act or sold in accordance with an exemption therefrom, such
as Rule 144. In general, under Rule 144 as currently in effect, a person (and
persons whose Common Units are aggregated with those of such person) who has
owned Restricted Units beneficially for at least one year, including an
affiliate for purposes of Rule 144, would be entitled to sell within any
three-month period a number of Common Units that does not exceed the greater of
(i) one percent of the then outstanding Common Units or (ii) the average weekly
trading volume of the Common Units during the four calendar weeks preceding the
date on which notice of the sale is filed with the Commission. Sales under Rule
144 are subject to certain manner of sale provisions, notice requirements and
the availability of current public information about the Partnership.
 
    Prior to the end of the Subordination Period, the Partnership may not issue
equity securities of the Partnership ranking prior or senior to the Common Units
or an aggregate of more than 4,270,000 additional Common Units (excluding Common
Units issued upon conversion of Subordinated Units, pursuant to the employee
benefit plans of the Managing General Partner, the Partnership or other members
of the Partnership Group, or in connection with certain acquisitions or capital
improvements or the repayment of certain indebtedness and subject to adjustment
in the event of a combination or subdivision of the Common Units), or an
equivalent amount of securities ranking on a parity with the Common Units,
without the approval of the holders of at least a Unit Majority. The Partnership
Agreement provides that, after the Subordination Period, the Partnership may
issue an unlimited number of limited partner interests of any type without a
vote of the Unitholders. The Partnership Agreement does not impose any
restriction on the Partnership's ability to issue equity securities ranking
junior to the Common Units at any time. Any issuance of additional Common Units
or certain other equity securities would result in a corresponding decrease in
the proportionate ownership interest in the Partnership represented by, and
could adversely affect the cash distributions to and market price of, Common
Units then outstanding. See "The Partnership Agreement--Issuance of Additional
Securities."
 
    Authorized but unissued Common Units with an aggregate value of $12.5
million (valued at the initial offering price in the IPO) are available for
issuance to executives, officers and directors of the Managing General Partner
pursuant to the Restricted Unit Plan. Common Units will be issued upon vesting
in accordance with the terms and conditions of the Restricted Unit Plan. As of
March 31, 1998 Common Units with an aggregate value of $10.4 million had been
allocated and the remaining Common Units available under the Restricted Unit
Plan may be allocated or issued in the future to such participants, and subject
to such terms and conditions, as the Board of Directors of the Managing General
Partner, or a committee thereof, shall determine.
 
    Pursuant to the Partnership Agreement, the General Partners and their
affiliates have the right, upon the terms and subject to the conditions therein,
to cause the Partnership to register under the Securities Act and state laws the
offer and sale of any Units or other Partnership Securities that they hold.
Subject to the terms and conditions of the Partnership Agreement, such
registration rights allow the General Partners and their affiliates or their
assignees holding any Units to require registration of any such Units and to
include any such Units in a registration by the Partnership of other Units,
including Units offered by the Partnership or by any Unitholder. Such
registration rights will continue in effect for two years following
 
                                       79
<PAGE>
any withdrawal or removal of the Managing General Partner as a general partner
of the Partnership. In connection with any such registration, the Partnership
will indemnify each Unitholder participating in such registration and its
officers, directors and controlling persons from and against any liabilities
under the Securities Act or any state securities laws arising from the
registration statement or prospectus. The Partnership will bear all costs and
expenses of any such registration. In addition, the General Partners and their
affiliates may sell their Units in private transactions at any time, subject to
compliance with applicable laws.
 
                              PLAN OF DISTRIBUTION
 
    The Common Units may be offered through one or more broker-dealers, through
underwriters, or directly to investors, at a fixed price or prices, which may be
changed from time to time, at market prices prevailing at the time of such sale,
at prices related to such market prices or at negotiated prices, and in
connection therewith distributors' or sellers' commission may be paid or
allowed, which will not exceed those customary in the types of transactions
involved. Broker-dealers may act as agents for the Partnership, or may purchase
Common Units from the Partnership as principal and thereafter resell such Common
Units from time to time or through one or more transactions (which may involve
crosses and block transactions) or distributions on the NYSE, in the
over-the-counter market, in private transactions or in some combination of the
foregoing.
 
    Any such broker-dealer or underwriter may receive compensation in the form
of underwriting discounts or commissions and may receive commissions from
purchasers of the Common Units for whom they may act as agents. If any such
broker-dealer purchases the Common Units as principal, it may effect resales of
the Common Units from time to time or through other broker-dealers, and such
other broker-dealers may receive compensation in the form of concessions or
commissions from the purchasers of Common Units for whom they may act as agents.
 
    To the extent required, the names of the specific managing underwriter or
underwriters, if any, as well as certain other information, will be set forth in
a Prospectus Supplement. In such event, the discounts and commissions to be
allowed or paid to the underwriters, if any, and the discounts and commissions
to be allowed or paid to dealers or agents, if any, will be set forth in, or may
be calculated from the Prospectus Supplement.
 
    Agents, dealers and underwriters may be entitled under agreements, entered
into with the Partnership, to indemnification by the Partnership against certain
civil liabilities, including liabilities under the Securities Act, or to
contribution with respect to payments which such agents, dealers or underwriters
may be required to make in respect thereof. Agents, dealers and underwriters may
be customers of, engage in transactions with or perform services for the
Partnership or its affiliates in the ordinary course of business.
 
    Under certain circumstances, this Prospectus also may be used for resales of
Common Units by persons who receive Common Units in acquisitions. See
"Outstanding Securities Covered by this Prospectus."
 
                          VALIDITY OF THE COMMON UNITS
 
    The validity of the Common Units has been passed upon for the Partnership by
McCutchen, Doyle, Brown & Enersen, LLP.
 
                                    EXPERTS
 
    The audited financial statements of Cornerstone Propane Partners, L.P.
incorporated by reference in this Prospectus and elsewhere in the Registration
Statement have been audited by Arthur Andersen LLP, independent public
accountants, as indicated in their report with respect thereto, and are included
herein in reliance upon the authority of said firm as experts in giving said
report.
 
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<PAGE>
    The audited financial statements incorporated by reference in this
Prospectus and elsewhere in the Registration Statement for Empire Energy
Corporation, to the extent and for the periods indicated in their report, have
been audited by Baird, Kurtz & Dobson, independent public accountants, and are
included herein in reliance upon the report of said firm given upon its
authority as experts in giving such report.
 
    The audited financial statements of SYN Inc. incorporated by reference in
this Prospectus and elsewhere in the Registration Statement have been audited by
Arthur Andersen LLP, independent public accountants, as indicated in their
report with respect thereto, and are included herein in reliance upon the
authority of said firm as experts in giving said report.
 
    The CGI Holdings, Inc. financial statements as of July 31, 1996 and for each
of the two years in the period ended July 31, 1996, and for the four and
one-half months ended December 16, 1996 incorporated by reference in this
Prospectus and elsewhere in the Registration Statement have been so included in
reliance on the report of PricewaterhouseCoopers LLP, independent accountants,
given on the authority of said firm as experts in auditing and accounting.
 
    The audited financial statements incorporated by reference in this
Prospectus and elsewhere in the Registration Statement for Synergy Group
Incorporated, to the extent and for the periods indicated in their report, have
been audited by Baird, Kurtz & Dobson, independent public accountants, and are
included herein in reliance upon the report of said firm given upon its
authority as experts in giving such report.
 
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<PAGE>
                                                                      APPENDIX A
 
                           GLOSSARY OF CERTAIN TERMS
 
    ACQUISITION:  Any transaction in which any member of the Partnership Group
acquires (through an asset acquisition, merger, stock acquisition or other form
of investment) control over all or a portion of the assets, properties or
business of another person for the purpose of increasing the operating capacity
or revenues of the Partnership Group from the operating capacity or revenues of
the Partnership Group existing immediately prior to such transaction.
 
    ACQUISITION FACILITY:  A $75.0 million revolving credit facility entered
into by the Operating Partnership to be used for acquisitions and improvements.
 
    ADJUSTED OPERATING SURPLUS:  With respect to any period, Operating Surplus
generated during such period (a) less (i) any net increase in working capital
borrowings during such period and (ii) any net reduction in cash reserves for
Operating Expenditures during such period not relating to an Operating
Expenditure made during such period, and (b) plus (i) any net decrease in
working capital borrowings during such period and (ii) any net increase in cash
reserves for Operating Expenditures during such period required by any debt
instrument for the repayment of principal, interest or premium. Adjusted
Operating Surplus does not include that portion of Operating Surplus included in
clause (a)(i) of the definition of Operating Surplus.
 
    AUDIT COMMITTEE:  A committee of the board of directors of the Managing
General Partner composed of at least two or more directors who are neither
officers nor employees of either of the General Partners nor officers, directors
or employees of any affiliate of either of the General Partners.
 
    AVAILABLE CASH:  With respect to any quarter prior to liquidation:
 
        (a) the sum of (i) all cash and cash equivalents of the Partnership
    Group on hand at the end of such quarter and (ii) all additional cash and
    cash equivalents of the Partnership Group on hand on the date of
    determination of Available Cash with respect to such quarter resulting from
    borrowings for working capital purposes made subsequent to the end of such
    quarter, less
 
        (b) the amount of any cash reserves that is necessary or appropriate in
    the reasonable discretion of the Managing General Partner to (i) provide for
    the proper conduct of the business of the Partnership Group (including
    reserves for future capital expenditures and for anticipated future credit
    needs of the Partnership Group) subsequent to such quarter, (ii) comply with
    applicable law or any loan agreement, security agreement, mortgage, debt
    instrument or other agreement or obligation to which any member of the
    Partnership Group is a party or by which it is bound or its assets are
    subject, or (iii) provide funds for distributions to Unitholders and the
    General Partners in respect of any one or more of the next four quarters;
    provided, however, that the Managing General Partner may not establish cash
    reserves pursuant to (iii) above if the effect of such reserves would be
    that the Partnership is unable to distribute the Minimum Quarterly
    Distribution on all Common Units with respect to such quarter; and, provided
    further, that disbursements made by a Group Member or cash reserves
    established, increased or reduced after the end of such quarter but on or
    before the date of determination of Available Cash with respect to such
    quarter shall be deemed to have been made, established, increased or reduced
    for purposes of determining Available Cash within such quarter if the
    Managing General Partner so determines. Notwithstanding the foregoing,
    "Available Cash" with respect to the quarter in which the liquidation of the
    Partnership occurs and any subsequent quarter shall equal zero.
 
    BANK CREDIT FACILITY:  The $75.0 million Acquisition Facility and the $50.0
million Working Capital Facility both entered into by the Operating Partnership.
 
                                      A-1
<PAGE>
    CAPITAL ACCOUNT:  The capital account maintained for a Partner pursuant to
the Partnership Agreement. The Capital Account of a Partner in respect of a
general partner interest, a Common Unit, a Subordinated Unit, an Incentive
Distribution Right or any other Partnership Interest shall be the amount which
such Capital Account would be if such general partner interest, Common Unit,
Subordinated Unit, Incentive Distribution Right, or other Partnership Interest
were the only interest in the Partnership held by a Partner from and after the
date on which such general partner interest, Common Unit, Subordinated Unit,
Incentive Distribution Right or other Partnership Interest was first issued.
 
    CAPITAL IMPROVEMENTS:  Any addition or improvement to the capital assets
owned by any member of the Partnership Group or acquisition of existing or the
construction of new capital assets (including retail distribution outlets,
propane tanks, pipeline systems, storage facilities, appliance showrooms,
training facilities and related assets), made to increase the operating capacity
of the Partnership Group from the operating capacity of the Partnership Group
existing immediately prior to such addition, improvement, acquisition or
construction.
 
    CAPITAL SURPLUS:  All Available Cash distributed by the Partnership from any
source will be treated as distributed from Operating Surplus until the sum of
all Available Cash distributed since the commencement of the Partnership equals
the Operating Surplus as of the end of the quarter prior to such distribution.
Any excess Available Cash will be deemed to be Capital Surplus.
 
    CAUSE:  Means a court of competent jurisdiction has entered a final,
non-appealable judgment finding the Managing General Partner liable for actual
fraud, gross negligence or willful or wanton misconduct in its capacity as a
general partner of the Partnership.
 
    CLOSING DATE:  The first date on which Common Units were sold by the
Partnership to the Underwriters pursuant to the provisions of the Underwriting
Agreement.
 
    COAST:  CGI Holdings, Inc., a Delaware corporation.
 
    CODE:  Internal Revenue Code of 1986, as amended.
 
    COMBINED OPERATIONS:  The propane business and assets of Synergy, Empire
Energy and Coast contributed to the Partnership pursuant to the Contribution
Agreement.
 
    COMMISSION:  Securities and Exchange Commission.
 
    COMMON UNIT ARREARAGE:  The amount by which the Minimum Quarterly
Distribution in respect of a quarter during the Subordination Period exceeds the
distribution of Available Cash from Operating Surplus actually made for such
quarter on a Common Unit, cumulative for such quarter and all prior quarters
during the Subordination Period.
 
    COMMON UNITS:  A Unit representing a fractional part of the Partnership
Interests of all limited partners and assignees and having the rights and
obligations specified with respect to Common Units in the Partnership Agreement.
 
    CONTRIBUTION AGREEMENT:  The Contribution, Conveyance and Assumption
Agreement dated the Closing Date among the Operating Partnership, the General
Partners and certain other parties governing the Transactions pursuant to which,
among other things, the propane assets and operations of Synergy, Empire Energy
and Coast were transferred and the liabilities assumed.
 
    CORNERSTONE:  Cornerstone Propane Partners, L.P., a Delaware limited
partnership.
 
    COUNSEL:  McCutchen, Doyle, Brown & Enersen, LLP, special counsel to the
General Partners and the Partnership.
 
                                      A-2
<PAGE>
    CURRENT MARKET PRICE:  With respect to any class of Units listed or admitted
to trading on any national securities exchange as of any date, the average of
the daily Closing Prices (as hereinafter defined) for the 20 consecutive Trading
Days (as hereinafter defined) immediately prior to such date. "Closing Price"
for any day means the last sale price on such day, regular way, or in case no
such sale takes place on such day, the average of the closing bid and asked
prices on such day, regular way, in either case as reported in the principal
consolidated transaction reporting system with respect to securities listed or
admitted to trading on the principal national securities exchange (other than
the Nasdaq Stock Market) on which the Units of such class are listed or admitted
to trading or, if the Units of such class are not listed or admitted to trading
on any national securities exchange (other than the Nasdaq Stock Market), the
last quoted price on such day, or, if not so quoted, the average of the high bid
and low asked prices on such day in the over-the-counter market, as reported by
the Nasdaq Stock Market or such other system then in use, or if on any such day
the Units of such class are not quoted by any such organization, the average of
the closing bid and asked prices on such day as furnished by a professional
market maker making a market in the Units of such class selected by the Managing
General Partner, or if on any such day no market maker is making a market in the
Units of such class, the fair value of such Units on such day as determined
reasonably and in good faith by the Managing General Partner. "Trading Days"
means a day on which the principal national securities exchange on which Units
of any class are listed or admitted to trading is open for the transaction of
business or, if the Units of a class are not listed or admitted to trading on
any national securities exchange, a day on which banking institutions in New
York City generally are open.
 
    DELAWARE ACT:  The Delaware Revised Uniform Limited Partnership Act, 6 Del
C. Section 17-101, et seq., as amended, supplemented or restated from time to
time, and any successor to such statute.
 
    DEPARTING PARTNER:  A former General Partner, either Managing General
Partner or Special General Partner, from and after the effective date of any
withdrawal or removal of such former General Partner pursuant to the Partnership
Agreement.
 
    EBITDA:  Operating income plus depreciation and amortization. As used in
this Prospectus, EBITDA is not intended to be construed as an alternative to net
income as an indicator of operating performance or as an alternative to cash
flow as a measure of liquidity or ability to service debt obligations.
 
    EMPIRE ENERGY:  Empire Energy Corporation, a Tennessee corporation.
 
    EXCHANGE ACT:  Securities Exchange Act of 1934, as amended.
 
    EXECUTIVES:  Messrs. Keith G. Baxter, Charles J. Kittrell, Ronald J. Goedde
and Vincent J. DiCosimo.
 
    GENERAL PARTNERS:  The Managing General Partner and the Special General
Partner and their successors and permitted assigns as general partners of the
Partnership and the Operating Partnership.
 
    HEATING DEGREE DAY:  Heating Degree Days measure the amount by which the
average of the high and low temperature on a given day is below 65 degrees
Fahrenheit. For example, if the high temperature is 60 degrees and the low
temperature is 40 degrees for a National Oceanic and Atmospheric Administration
measurement location, the average temperature is 50 degrees and the number of
heating degree days for that day is 15.
 
    INCENTIVE DISTRIBUTION RIGHT:  A non-voting limited partner Partnership
Interest issued to the General Partners in connection with the transfer of their
assets to the Partnership, which Partnership Interest confers upon the holder
thereof only the rights and obligations specifically provided in the Partnership
Agreement with respect to Incentive Distribution Rights (and no other rights
otherwise available to or other obligations of holders of a Partnership
Interest).
 
    INCENTIVE DISTRIBUTIONS:  The distributions of Available Cash from Operating
Surplus initially made to the General Partners that are in excess of the General
Partners' aggregate 2% general partner interest.
 
                                      A-3
<PAGE>
    INITIAL UNIT PRICE:  $21.00 per Common Unit, the amount per Unit equal to
the initial public offering price of the Common Units in the IPO.
 
    IRS:  Internal Revenue Service.
 
    MANAGING GENERAL PARTNER:  Cornerstone Propane GP, Inc., a California
corporation, and its successors, as managing general partner of the Partnership.
 
    MINIMUM QUARTERLY DISTRIBUTION:  $.54 per Unit with respect to each quarter
or $2.16 per Unit on an annualized basis, subject to adjustment as described in
"Cash Distribution Policy--Distributions from Capital Surplus" and "Cash
Distribution Policy--Adjustment of Minimum Quarterly Distribution and Target
Distribution Levels."
 
    NEW ACQUISITION INCENTIVE PLAN:  The plan providing bonuses to participants
in the plan (who are determined by the Board of Directors of the Managing
General Partner and include the Executives) for adding new businesses to the
Partnership's propane operations, based upon 4% of the gross acquisition price,
spread among the participants in the plan based on their relative salaries.
 
    NON-CITIZEN ASSIGNEE:  A Limited Partner or assignee who (i) fails to
furnish information about nationality, citizenship, residency or other related
status within 30 days after a request by the Managing General Partner for such
information, or (ii) the Managing General Partner determines after receipt of
such information is not an eligible citizen.
 
    NOR:  Northwestern Corporation, a Delaware corporation.
 
    NORTHWESTERN GROWTH:  Northwestern Growth Corporation, a South Dakota
corporation and a wholly owned subsidiary of NOR.
 
    NOTE PLACEMENT:  The private placement by the Operating Partnership of the
Notes.
 
    NOTES:  The $220.0 million aggregate principal amount of Senior Secured
Notes due 2010 privately placed by the Operating Partnership.
 
    OPERATING EXPENDITURES:  All Partnership Group expenditures, including
taxes, reimbursements of the General Partners, debt service payments and capital
expenditures, subject to the following:
 
        (a) Payments (including prepayments) of principal and premium on a debt
    shall not be an Operating Expenditure if the payment is (i) required in
    connection with the sale or other disposition of assets or (ii) made in
    connection with the refinancing or refunding of indebtedness with the
    proceeds from new indebtedness or from the sale of equity interests. For
    purposes of the foregoing, at the election and in the reasonable discretion
    of the Managing General Partner, any payment of principal or premium shall
    be deemed to be refunded or refinanced by any indebtedness incurred or to be
    incurred by the Partnership Group within 180 days before or after such
    payment to the extent of the principal amount of such indebtedness.
 
    (b) Operating Expenditures shall not include (i) capital expenditures made
for Acquisitions or for Capital Improvements (as opposed to capital expenditures
made to maintain assets), (ii) payment of transaction expenses relating to
Interim Capital Transactions or (iii) distributions to partners. Where capital
expenditures are made in part for Acquisitions or Capital Improvements and in
part for other purposes, the Managing General Partner's good faith allocation
between the amounts paid for each shall be conclusive.
 
    OPERATING PARTNERSHIP:  Cornerstone Propane, L.P., a Delaware limited
partnership, and any successors thereto.
 
                                      A-4
<PAGE>
    OPERATING PARTNERSHIP AGREEMENT  The Amended and Restated Agreement of
Limited Partnership of the Operating Partnership dated as of December 17, 1996
(which has been filed as an exhibit to the registration statement of which this
Prospectus is a part).
 
    OPERATING SURPLUS:  As to any period prior to liquidation, on a cumulative
basis and without duplication:
 
        (a) the sum of (i) $25 million plus all cash and cash equivalents of the
    Partnership Group on hand as of the close of business on the Closing Date,
    (ii) all cash receipts of the Partnership Group for the period beginning on
    the Closing Date and ending with the last day of such period, other than
    cash receipts from Interim Capital Transactions and (iii) all cash receipts
    of the Partnership Group after the end of such period but on or before the
    date of determination of Operating Surplus with respect to such period
    resulting from borrowings for working capital purposes, less
 
        (b) the sum of (i) Operating Expenditures for the period beginning on
    the Closing Date and ending with the last day of such period and (ii) the
    amount of cash reserves that is necessary or advisable in the reasonable
    discretion of the Managing General Partner to provide funds for future
    Operating Expenditures, provided however, that disbursements made (including
    contributions to a member of the Partnership Group or disbursements on
    behalf of a member of the Partnership Group) or cash reserves established,
    increased or reduced after the end of such period but on or before the date
    of determination of Available Cash with respect to such period shall be
    deemed to have been made, established, increased or reduced for purposes of
    determining Operating Surplus, within such period if the Managing General
    Partner so determines. Notwithstanding the foregoing, "Operating Surplus"
    with respect to the quarter in which the liquidation occurs and any
    subsequent quarter shall equal zero.
 
    OPINION OF COUNSEL:  A written opinion of counsel, acceptable to the
Managing General Partner in its reasonable discretion, to the effect that the
taking of a particular action will not result in the loss of the limited
liability of the limited partners of the Partnership or cause the Partnership to
be treated as an association taxable as a corporation or otherwise taxed as an
entity for federal income tax purposes.
 
    PARTNERSHIP:  Cornerstone Propane Partners, L.P., a Delaware limited
partnership, and any successors thereto.
 
    PARTNERSHIP AGREEMENT:  The Amended and Restated Agreement of Limited
Partnership of the Partnership dated as of December 17, 1996, (which has been
filed as an exhibit to the registration statement of which this Prospectus is a
part), as it may be amended, restated or supplemented from time to time. Unless
the context requires otherwise, references to the Partnership Agreement
constitute references to the Partnership Agreement of the Partnership and to the
Operating Partnership Agreement, collectively.
 
    PARTNERSHIP GROUP:  The Partnership, the Operating Partnership and any
subsidiary of either such entity, treated as a single consolidated entity.
 
    PARTNERSHIP INTEREST:  An interest in the Partnership, which shall include
general partner interests, Common Units, Subordinated Units, Incentive
Distribution Rights or other equity securities of the Partnership, or a
combination thereof or interest therein as the case may be.
 
    PLANS:  The New Acquisition Incentive Plan of the Managing General Partner,
together with the Annual Operating Performance Incentive Plan.
 
    REGISTRATION STATEMENT:  The Registration Statement on Form S-3, as amended
(No. 333-     ), filed by the Partnership with the Commission.
 
    RESTRICTED UNIT PLAN:  The Cornerstone Propane Partners, L.P. 1996
Restricted Unit Plan.
 
                                      A-5
<PAGE>
    SECURITIES ACT:  The Securities Act of 1933, as amended.
 
    SPECIAL GENERAL PARTNER:  Synergy and its successors and assigns as special
general partner of the Partnership.
 
    SUBORDINATED UNIT:  A Unit representing a fractional part of the Partnership
Interests of all limited partners and assignees and having the rights and
obligations specified with respect to Subordinated Units in the Partnership
Agreement.
 
    SUBORDINATION PERIOD:  The Subordination Period will generally extend until
the first to occur of: (a) the first day of any quarter beginning after December
31, 2001 in respect of which (i) distributions of Available Cash from Operating
Surplus on each of the outstanding Common Units and the Subordinated Units with
respect to each of the three consecutive, non-overlapping four-quarter periods
immediately preceding such date equaled or exceeded the sum of the Minimum
Quarterly Distribution on all of the outstanding Common Units and Subordinated
Units during such periods, (ii) the Adjusted Operating Surplus generated during
each of the three consecutive, non-overlapping four-quarter periods immediately
preceding such date equaled or exceeded the sum of the Minimum Quarterly
Distribution on all of the outstanding Common Units and Subordinated Units, plus
the related distribution on the general partner interests in the Partnership and
in the Operating Partnership during such periods, and (iii) there are no
outstanding Common Unit Arrearages; and (b) the date on which the Managing
General Partner is removed as general partner of the Partnership upon the
requisite vote by holders of Outstanding Units under circumstances where Cause
does not exist and Units held by the General Partners and their Affiliates are
not voted in favor of such removal. Prior to the end of the Subordination
Period, one-quarter of the Subordinated Units (1,649,405 Subordinated Units)
will convert into Common Units on a one-for-one basis on the first day after the
record date established by the Managing General Partner for any quarter ending
on or after December 31, 2000 in respect of which (i) distributions of Available
Cash from Operating Surplus on the Common Units and the Subordinated Units with
respect to each of the three consecutive, non-overlapping four-quarter periods
immediately preceding such date equaled or exceeded the sum of the Minimum
Quarterly Distribution on all of the outstanding Common Units and Subordinated
Units during such periods, (ii) the Adjusted Operating Surplus generated during
each of the two consecutive, non-overlapping four-quarter periods immediately
preceding such date equaled or exceeded the sum of the Minimum Quarterly
Distribution on all of the outstanding Common Units and Subordinated Units and
the related distribution on the general partner interests in the Partnership and
in the Operating Partnership during such periods, and (iii) there are no
outstanding Common Unit Arrearages. In addition, if the Managing General Partner
is removed as general partner of the Partnership under circumstances where Cause
does not exist and Units held by the General Partners and their affiliates are
not voted in favor of such removal (i) the Subordination Period will end and all
outstanding Subordinated Units will immediately and automatically convert into
Common Units on a one-for-one basis, (ii) any existing Common Unit Arrearages
will be extinguished and (iii) the General Partners will have the right to
convert their 2% general partner interests (and all the rights to the Incentive
Distribution) into Common Units or to receive cash in exchange for such
interests.
 
    SYNERGY:  SYN Inc., a Delaware corporation and majority-owned subsidiary of
Northwestern Growth.
 
    TARGET DISTRIBUTION LEVELS:  See "Cash Distribution Policy--Incentive
Distributions--Hypothetical Annualized Yield."
 
    TRANSFER AGENT:  Continental Stock Transfer & Trust Company serving as
registrar and transfer agent for the Common Units.
 
    TRANSFER APPLICATION:  An application for transfer of Units in the form set
forth on the back of a certificate.
 
    UNITHOLDERS:  Holders of the Common Units and the Subordinated Units,
collectively.
 
                                      A-6
<PAGE>
    UNIT MAJORITY:  During the Subordination Period, at least a majority of the
outstanding Common Units, voting as class, and at least a majority of the
outstanding Subordinated Units, voting as a class and, thereafter, at least a
majority of the outstanding Units.
 
    UNITS:  The Common Units and the Subordinated Units, collectively, but not
including the right to receive Incentive Distributions.
 
    UNRECOVERED CAPITAL:  At any time, the Initial Unit Price, less the sum of
all distributions theretofore made in respect of an Initial Common Unit
constituting Capital Surplus and any distributions of cash (or the net agreed
value of any distributions in kind) in connection with the dissolution and
liquidation of the Partnership theretofore made in respect of such Unit,
adjusted as the Managing General Partner determines to be appropriate to give
effect to any distribution, subdivision or combination of such Units.
 
    WORKING CAPITAL FACILITY:  A $50.0 million revolving credit facility entered
into by the Operating Partnership to be used for working capital and other
Partnership purposes.
 
                                      A-7
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
    The following table sets forth an estimate of the expenses expected to be
incurred in connection with the issuance and distribution of the securities
being registered, other than underwriting compensation:
 
<TABLE>
<S>                                                                <C>
Registration Fee--Securities and Exchange Commission.............  $  14,842
New York Stock Exchange additional listing fee...................      8,750
Blue Sky Fees and Expenses.......................................      1,000
Accounting Fees and Expenses.....................................     10,000
Legal Fees and Expenses..........................................     30,000
Printing Fees and Expenses.......................................     10,000
Transfer Agent Fees and Expenses.................................      1,000
Miscellaneous....................................................      1,000
                                                                   ---------
    TOTAL........................................................  $  76,592
                                                                   ---------
                                                                   ---------
</TABLE>
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
    The Section of the Prospectus entitled "The Partnership
Agreement--Indemnification" is incorporated herein by this reference.
 
    Subject to any terms, conditions or restrictions set forth in the
Partnership Agreements, Section 17-108 of the Delaware Revised Limited
Partnership Act empowers a Delaware limited partnership to indemnify and hold
harmless any partner or other person from and against all claims and demands
whatsoever.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
        (a) Exhibits
 
<TABLE>
<CAPTION>
EXHIBIT NO.                                               DESCRIPTION
- -----------  -----------------------------------------------------------------------------------------------------
<C>          <S>
       *3.1  Amended and Restated Agreement of Limited Partnership of Cornerstone Propane Partners, L.P. dated as
               of December 17, 1996.
 
       *3.2  Amended and Restated Agreement of Limited Partnership of Cornerstone Propane, L.P. dated as of
               December 17, 1996.
 
        5.1  Opinion of McCutchen, Doyle, Brown & Enersen, LLP as to the legality of the securities being
               registered.
 
        8.1  Opinion of McCutchen, Doyle, Brown & Enersen, LLP relating to tax matters.
 
      *10.1  Credit Agreement dated December 17, 1996, among Cornerstone Propane, L.P., various financial
               institutions and Bank of America National Trust and Savings Association, as agent.
 
      *10.2  Note Purchase Agreement dated December 17, 1996, among Cornerstone Propane, L.P. and certain
               investors.
 
      *10.3  Contribution, Conveyance and Assumption Agreement dated as of December 17, 1996, among Cornerstone
               Propane Partners, L.P., Cornerstone Propane, L.P., Cornerstone Propane GP, Inc., Empire Energy SC
               Corporation and SYN Inc.
 
      *10.4  1996 Cornerstone Propane Partners, L.P. Restricted Unit Plan.
</TABLE>
 
                                      II-1
<PAGE>
<TABLE>
<CAPTION>
EXHIBIT NO.                                               DESCRIPTION
- -----------  -----------------------------------------------------------------------------------------------------
<C>          <S>
    ***10.5  Form of Amended and Restated Employment Agreements for Messrs. Baxter, Kittrell, Goedde and DiCosimo
               effective as of May 1, 1997.
 
     **10.6  Amendment No. 1 to Credit Agreement.
 
     **10.7  Amendment No. 2 to Credit Agreement.
 
     **21.1  List of Subsidiaries
 
       23.1  Consent of Arthur Andersen LLP
 
       23.2  Consent of Baird, Kurtz & Dobson
 
       23.3  Consent of PricewaterhouseCoopers LLP
 
       23.4  Consent of McCutchen, Doyle, Brown & Enersen, LLP (included in Exhibit 5.1 and 8.1)
 
       24.1  Powers of Attorney (included on signature page)
</TABLE>
 
- ------------------------
 
  * Incorporated by reference to the Partnership's Current Report on Form 8-K
    dated April 14, 1997.
 
 ** Incorporated by reference to the Partnership's Annual Report on Form 10-K
    for the fiscal year ended June 30, 1997.
 
*** Incorporated by reference to the Partnership's Quarterly Report on Form 10-Q
    for the quarter ended December 31, 1997.
 
        (b) Financial Statement Schedules.
 
    All Financial statement schedules are omitted because the information is not
required, is not material or is otherwise included in the financial statements
or related notes thereto.
 
ITEM 17. UNDERTAKINGS.
 
    The undersigned Registrant hereby undertakes:
 
        (1) To file, during any period in which offers or sales are being made,
    a post-effective amendment to this Registration Statement:
 
           (a) to include any prospectus required by Section 10(a)(3) of the
       Securities Act of 1933;
 
           (b) to reflect in the prospectus any facts or events arising after
       the effective date of the Registration Statement (or the most recent
       post-effective amendment thereof) which, individually or in the
       aggregate, represent a fundamental change in the information set forth in
       the Registration Statement. Notwithstanding the foregoing, any increase
       or decrease in volume of securities offered (if the total dollar value of
       securities offered would not exceed that which was registered) and any
       deviation from the low or high end of the estimated maximum offering
       range may be reflected in the form of prospectus filed with the
       Commission pursuant to rule 424(b) if, in the aggregate, the changes in
       volume and price represent no more than a 20% change in the maximum
       aggregate offering price set forth in the "Calculation of Registration
       Fee" table in the effective Registration Statement provided, however,
       that the undertakings set forth in paragraphs(1)(a) and (1)(b) above do
       not apply if the information required to be included in a post-effective
       amendment by those paragraphs is contained in periodic reports filed with
       or furnished to the Commission by the registrant pursuant to Section 13
       or 15(d) of the Securities Exchange Act of 1934 that are incorporated by
       reference in this Registration Statement; and
 
           (c) to include any material information with respect to the plan of
       distribution not previously disclosed in the Registration Statement or
       any material change to such information in the Registration Statement.
 
                                      II-2
<PAGE>
        (2) That, for the purpose of determining any liability under the
    Securities Act of 1933, as amended (the "Securities Act"), each such
    post-effective amendment shall be deemed to be a new registration statement
    relating to the securities offered therein, and the offering of such
    securities at that time shall be deemed to be the initial bona fide offering
    thereof.
 
        (3) To remove from registration by means of a post-effective amendment
    any of the securities being registered which remain unsold at the
    termination of the offering.
 
        (4) Insofar as indemnification for liabilities arising under the
    Securities Act may be permitted to directors, officers and controlling
    persons of the Registrant pursuant to the foregoing provisions, or
    otherwise, the Registrant has been advised that in the opinion of the
    Securities and Exchange Commission such indemnification is against public
    policy as expressed in the Securities Act and is, therefor, unenforceable.
    In the event that a claim for indemnification against such liabilities
    (other than the payment by the Registrant of expenses incurred or paid by a
    director, officer of controlling person of the Registrant in the successful
    defense of any action, suit or proceeding) is asserted by such director,
    officer or controlling person in connection with the securities being
    registered, the Registrant will, unless in the opinion of its counsel the
    matter has been settled by controlling precedent, submit to a court of
    appropriate jurisdiction the question whether such indemnification by it is
    against public policy as expressed in the Securities Act and will be
    governed by the final adjudication of such issue.
 
        (5) That, for the purposes of determining any liability under the
    Securities Act of 1933, each filing of the Registrant's annual report
    pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934
    that is incorporated by reference in the Registration Statement shall be
    deemed to be a new registration statement relating to the securities offered
    therein, and the offering of such securities at that time shall be deemed to
    be the initial bona fide offering thereof.
 
        (6) For purposes of determining any liability under the Securities Act
    of 1933:
 
           (a) the information omitted from the form of prospectus filed as part
       of the Registration Statement in reliance upon Rule 430A and contained in
       the form of prospectus filed by the Registrant pursuant to Rule 424(b)(1)
       or (4) or 497(h) under the Securities Act shall be deemed to be part of
       the Registration Statement as of the time it was declared effective; and
 
           (b) each post-effective amendment that contains a form of prospectus
       shall be deemed to be a new registration statement relating to the
       securities offered therein, and the offering of such securities at that
       time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-3
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Watsonville, State of California, on August 7, 1998.
 
<TABLE>
<S>                             <C>  <C>  <C>
                                CORNERSTONE PROPANE PARTNERS, L.P.
 
                                By:  CORNERSTONE PROPANE GP, INC.,
                                     GENERAL PARTNER
 
                                     By:             /s/ KEITH G. BAXTER
                                            -------------------------------------
                                                       Keith G. Baxter
                                            PRESIDENT AND CHIEF EXECUTIVE OFFICER
</TABLE>
 
                               POWER OF ATTORNEY
 
    Each person whose signature appears below appoints Richard R. Hylland,
Daniel K. Newell, Keith G. Baxter and Ronald J. Goedde, and each of them, any of
whom may act without the joinder of the other, as his true and lawful
attorneys-in-fact and agents, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this Registration Statement and any Registration Statement (including any
amendment thereto) for this Offering that is to be effective upon filing
pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and to
file the same, with all exhibits thereto, and all other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as fully to all intents
and purposes as he might or would do in person, hereby ratifying and conforming
all that said attorney-in-fact and agents or any of them or their or his
substitute and substitutes, may lawfully do or cause to be done by virtue
hereof.
 
    Pursuant to the requirements of the Securities Act of 1933, as amended, this
registration statement has been signed by the following persons in the
capacities and dates indicated below.
 
<TABLE>
<CAPTION>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
<C>                             <S>                         <C>
      /s/ MERLE D. LEWIS        Chairman of the Board and
- ------------------------------    Director of Cornerstone     August 7, 1998
        Merle D. Lewis            Propane GP, Inc.
 
                                Vice Chairman of the Board
    /s/ RICHARD R. HYLLAND        and Director of
- ------------------------------    Cornerstone Propane GP,     August 7, 1998
      Richard R. Hylland          Inc.
 
                                President, Chief Executive
     /s/ KEITH G. BAXTER          Officer and Director of
- ------------------------------    Cornerstone Propane GP,     August 7, 1998
       Keith G. Baxter            Inc. (Principal
                                  Executive Officer)
</TABLE>
 
                                      II-4
<PAGE>
<TABLE>
<CAPTION>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
<C>                             <S>                         <C>
                                Executive Vice President
                                  and Chief Financial
     /s/ RONALD J. GOEDDE         Officer of Cornerstone
- ------------------------------    Propane GP, Inc.            August 7, 1998
       Ronald J. Goedde           (Principal Financial and
                                  Accounting Officer)
 
     /s/ DANIEL K. NEWELL
- ------------------------------  Director of Cornerstone       August 7, 1998
       Daniel K. Newell           Propane GP, Inc.
 
      /s/ PAUL CHRISTEN
- ------------------------------  Director of Cornerstone       August 7, 1998
        Paul Christen             Propane GP, Inc.
 
        /s/ KURT KATZ
- ------------------------------  Director of Cornerstone       August 7, 1998
          Kurt Katz               Propane GP, Inc.
</TABLE>
 
                                      II-5
<PAGE>
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
EXHIBITS                                                 DESCRIPTION
- ---------  -------------------------------------------------------------------------------------------------------
<C>        <S>
     *3.1  Amended and Restated Agreement of Limited Partnership of Cornerstone Propane Partners, L.P. dated as of
             December 17, 1996.
 
     *3.2  Amended and Restated Agreement of Limited Partnership of Cornerstone Propane, L.P. dated as of December
             17, 1996.
 
      5.1  Opinion of McCutchen, Doyle, Brown & Enersen, LLP as to the legality of the securities being
             registered.
 
      8.1  Opinion of McCutchen, Doyle, Brown & Enersen, LLP relating to tax matters.
 
    *10.1  Credit Agreement dated December 17, 1996, among Cornerstone Propane, L.P., various financial
             institutions and Bank of America National Trust and Savings Association, as agent.
 
    *10.2  Note Purchase Agreement dated December 17, 1996, among Cornerstone Propane, L.P. and certain investors.
 
    *10.3  Contribution, Conveyance and Assumption Agreement dated as of December 17, 1996, among Cornerstone
             Propane Partners, L.P., Cornerstone Propane, L.P., Cornerstone Propane GP, Inc., Empire Energy SC
             Corporation and SYN Inc.
 
    *10.4  1996 Cornerstone Propane Partners, L.P. Restricted Unit Plan.
 
  ***10.5  Form of Amended and Restated Employment Agreements for Messrs. Baxter, Kittrell, Goedde and DiCosimo,
             effective as of May 1, 1997.
 
   **10.6  Amendment No. 1 to Credit Agreement.
 
   **10.7  Amendment No. 2 to Credit Agreement.
 
   **21.1  List of Subsidiaries
 
     23.1  Consent of Arthur Andersen LLP
 
     23.2  Consent of Baird, Kurtz & Dobson
 
     23.3  Consent of PricewaterhouseCoopers LLP
 
     23.4  Consent of McCutchen, Doyle, Brown & Enersen, LLP (included in Exhibit 5.1 and 8.1)
 
     24.1  Powers of Attorney (included on signature page)
</TABLE>
 
- ------------------------
 
  * Incorporated by reference to the Partnership's Current Report on Form 8-K
    dated April 14, 1997.
 
 ** Incorporated by reference to the Partnership's Annual Report on Form 10-K
    for the fiscal year ended June 30, 1997.
 
*** Incorporated by reference to the Partnership's Quarterly Report on Form 10-Q
    for the quarter ended December 31, 1997.

<PAGE>
                                                                     EXHIBIT 5.1
 
             [LETTERHEAD OF MCCUTCHEN, DOYLE, BROWN & ENERSEN, LLP]
 
August 7, 1998
 
Cornerstone Propane Partners, L.P.
432 Westridge Drive
Watsonville, California 95076
 
Gentlemen:
 
    We have acted as counsel to Cornerstone Propane Partners, L.P., a Delaware
limited partnership (the "Partnership"), and Cornerstone Propane GP, Inc., a
California corporation and the managing general partner of the Partnership, in
connection with the registration under the Securities Act of 1933, as amended,
of up to 2,500,000 common units representing limited partner interests in the
Partnership (the "Common Units") which may be issued from time to time pursuant
to the Partnership's registration statement on Form S-3 being filed with the
Securities and Exchange Commission (the "Registration Statement").
 
    In connection with the opinions expressed below, we have examined such
statutes, regulations, partnership and corporate records and documents,
certificates of corporate and public officials, and other instruments as we have
deemed necessary or advisable. In such examination, we have assumed the
authenticity of all documents submitted to us as originals and the conformity
with the original documents of all documents submitted to us as copies. We have
also assumed that, at the time of each issuance, sale and delivery of Common
Units, such Common Units will be issued, sold and delivered in a manner
consistent with the Delaware Revised Uniform Limited Partnership Act (the
"Delaware Act") and the partnership agreement of the Partnership as in effect at
such time.
 
    Based on the foregoing and on such legal considerations as we deem relevant,
we are of the opinion that:
 
        1.  The Partnership has been duly formed and is validly existing as a
    limited partnership under the Delaware Act.
 
        2.  When appropriate partnership action has been taken to authorize the
    issuance of any Common Units and such Common Units have been issued and paid
    for as described in the prospectus contained in the Registration Statement,
    as amended or supplemented (the "Prospectus"), such Common Units will be
    duly authorized, validly issued, fully paid and nonassessable, except as
    such nonassessability may be affected by the matters described in the
    Prospectus under the caption "The Partnership Agreement--Limited Liability."
 
    We hereby consent to the use of this opinion as an exhibit to the
Registration Statement and to the reference to our firm under the caption
"Validity of the Common Units" in the Prospectus.
 
                                          Very truly yours,
 
                                          McCUTCHEN, DOYLE, BROWN & ENERSEN, LLP
 
                                          By: /s/ BARTLEY C. DEAMER_____________
                                                    A Member of the Firm

<PAGE>
                                                                     EXHIBIT 8.1
 
             [LETTERHEAD OF MCCUTCHEN, DOYLE, BROWN & ENERSEN, LLP]
 
August 7, 1998
 
Cornerstone Propane Partners, L.P.
432 Westridge Drive
Watsonville, California 95076
 
   Re: Cornerstone Propane Partners, L.P. Registration Statement on Form S-3
 
Ladies and Gentlemen:
 
    We have acted as special tax counsel to Cornerstone Propane Partners, L.P.,
a Delaware limited partnership (the "Partnership"), in connection with the
registration under the Securities Act of 1933, as amended, of up to 2,500,000
common units representing limited partner interests in the Partnership (the
"Common Units") which may be issued from time to time pursuant to the
Partnership's registration statement on Form S-3 being filed with the Securities
and Exchange Commission (the "Registration Statement"). The Common Units will be
issued from time to time in connection with the Partnership's acquisitions of
businesses, assets or securities in amounts, at prices and on terms to be
determined at the time of such acquisitions.
 
    Assuming the transactions set forth in the operative documents for the
Common Units (which are described in the prospectus contained in the
Registration Statement (the "Prospectus"), as it may be amended or
supplemented), will be performed in accordance with the terms described therein,
we hereby confirm to you our opinion as set forth under the heading "Tax
Considerations" in the Prospectus, subject to the limitations set forth therein.
 
    Our opinion is based on current provisions of the Internal Revenue Code of
1986, as amended, the Treasury Regulations promulgated thereunder, published
pronouncements of the Internal Revenue Service and case law, any of which may be
changed at any time with retroactive effect. Any change in applicable laws or
facts and circumstances surrounding the offering of the Common Units, or any
inaccuracy in the statements, facts, assumptions and representations on which we
have relied, may affect the continuing validity of the opinions set forth
herein. We assume no responsibility to inform you of any such change or
inaccuracy that may occur or come to our attention.
 
    We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and the reference to us under the heading "Tax
Considerations" in the Prospectus.
 
                                          Very truly yours,
 
                                          McCUTCHEN, DOYLE, BROWN & ENERSEN, LLP
 
                                          By: /s/ ROGER D. EHLERS_______________
                                                    A MEMBER OF THE FIRM

<PAGE>
                                                                    EXHIBIT 23.1
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
    As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of our reports dated August 4, 1997
included in Cornerstone Propane Partners, L.P.'s Form 10-K for the year ended
June 30, 1997 and to all references to our Firm included in this registration
statement on Form S-3.
 
                                          ARTHUR ANDERSEN LLP
 
Minneapolis, Minnesota
August 6, 1998

<PAGE>
                                                                    EXHIBIT 23.2
 
    We hereby consent to the use in the Registration Statement on Form S-3 of
our report dated August 4, 1997, relating to the financial statements of EMPIRE
ENERGY CORPORATION and our report dated October 9, 1996, relating to the
financial statements of SYNERGY GROUP INCORPORATED, incorporated by reference
from the 1997 Cornerstone Propane Partners, L.P. Form 10-K. We also consent to
the reference to us under the heading "Experts" in such Registration Statement.
 
                                          BAIRD KURTZ & DOBSON
 
Springfield, Missouri
August 6, 1998

<PAGE>
                                                                    EXHIBIT 23.3
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
    We hereby consent to the incorporation by reference in the Prospectus
constituting part of this Registration Statement on Form S-3 of Cornerstone
Propane Partners, L.P. of our report dated August 8, 1997 relating to the
consolidated financial statements of CGI Holdings, Inc. appearing in Cornerstone
Propane Partners, L.P.'s Annual Report on Form 10-K for the year ended June 30,
1997. We also consent to the reference to us under the heading "Experts" in such
Prospectus.
 
                                          PRICEWATERHOUSECOOPERS LLP
 
San Francisco, California
August 6, 1998


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