PROVIDENCE GAS CO
10-K, 1998-12-23
NATURAL GAS DISTRIBUTION
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<PAGE>
 
                                   FORM 10-K
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D. C. 20549

[X]   Annual Report Pursuant to Section 13 or 15(d) of the Securities
      Exchange Act of 1934

For the fiscal year ended September 30, 1998
                          ------------------
                                  OR

[ ]   Transition Report Pursuant to Section 13 or 15(d) of the Securities   
      Exchange Act of 1934

For the transition period from ____________________ to _________________

Commission file number 0-1160
                       ------

                       THE PROVIDENCE GAS COMPANY      
- --------------------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)

          Rhode Island                              05-0203650
- --------------------------------------------------------------------------------
 (State or other jurisdiction of                (I. R. S. Employer
 incorporation or organization)                 Identification No.)

100 Weybosset Street, Providence, Rhode Island                02903
- --------------------------------------------------------------------------------
 (Address of principal executive offices)                   (Zip Code)


Registrant's telephone number, including area code       401-272-5040
                                                   -------------------------

Securities registered pursuant to Section 12(b) of the Act:

Title of each class           Name of each exchange on which registered
- -------------------           -----------------------------------------

      NONE                                        NONE              
- --------------------------------------------------------------------------------
          Securities registered pursuant to Section 12(g) of the Act:

                                     NONE
- --------------------------------------------------------------------------------
                               (Title of class)

     Indicate by checkmark whether the Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. YES X NO ___
                                          ---  
     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulations S-K is not contained herein, and will not be contained, to
the best of Registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [X]

     State the aggregate market value of the voting stock held by non-affiliates
of the Registrant, as of December 22, 1998: $0

     Indicate the number of shares outstanding of each of the Registrant's
classes of common stock, as of the latest practicable date: Common Stock, $1.00
                                                            -------------------
Par Value: 1,243,598 shares outstanding at December 22, 1998.
- ------------------------------------------------------------

DOCUMENTS INCORPORATED BY REFERENCE
- -----------------------------------
NONE
<PAGE>
 
TABLE OF CONTENTS

<TABLE> 
<CAPTION> 
PART I                                                          PAGE
<S>                                                             <C> 
 Item 1 -  Business
              General                                            I-1    
              Gas Supply                                         I-2    
              Rates and Regulations                              I-3    
              Competition and Marketing                          I-4    
              Employees                                          I-5    
              Special Factors Affecting the                             
               Natural Gas Industry                              I-5    
              FERC Regulations                                   I-6    
              Environmental Regulations                          I-6    
              Other Standards                                    I-8    
                                                                        
 Item 2 -  Properties                                            I-9    
                                                                        
 Item 3 -  Legal Proceedings                                     I-9    
                                                                        
 Item 4 -  Submission of Matters to a Vote of Security Holders   I-9    
                                                                        
PART II                                                                 
                                                                        
 Item 5 -  Market for Registrant's Common Equity and Related            
              Stockholder Matters                                II-1   
                                                                        
 Item 6 -  Selected Financial Data                               II-2   
                                                                        
 Item 7 -  Management's Discussion and Analysis of Financial            
                 Condition and Results of Operations             II-3   
                                                                        
 Item 8 -  Financial Statements and Supplementary Data           II-11  
                                                                        
           Report of Independent Public Accountants              II-32  
                                                                        
 Item 9 -  Changes in and Disagreements with Accountants                
              on Accounting and Financial Disclosure             II-33  
                                                                        
PART III                                                                
                                                                        
 Item 10 - Directors and Executive Officers of the Registrant    III-1  
                                                                        
 Item 11 - Executive Compensation                                III-4  
                                                                        
 Item 12 - Security Ownership of Certain Beneficial Owners              
              and Management                                     III-4  
                                                                        
 Item 13 - Certain Relationships and Related Transactions        III-4  
                                                                        
                                                                        
PART IV                                                                 
                                                                        
 Item 14 - Exhibits, Financial Statement Schedules and Reports          
               on Form 8-K                                       IV-1   
                                                                        
 Supplemental Schedule                                           IV-3   
                                                                        
 Signatures                                                      IV-6    
</TABLE> 
<PAGE>
 
PART I
- ------

ITEM 1. BUSINESS
- ----------------

    The Providence Gas Company (the Registrant) and its subsidiary and their
representatives may from time to time make written or oral statements, including
statements contained in the Registrant's filings with the Securities and
Exchange Commission (SEC), which constitute or contain "forward-looking"
statements as that term is defined in the Private Securities Litigation Reform
Act of 1995 or by the SEC in its rules, regulations, and releases. All
statements other than statements of historical facts included in this Form 10-K
regarding the Registrant's financial position, strategic initiatives and
addressing industry developments are forward-looking statements.  Where, in any
forward looking statement, the Registrant, or its management, expresses an
expectation or belief as to future results, such expectation or belief is
expressed in good faith and believed to have a reasonable basis, but there can
be no assurance that the statement of expectation or belief will result or be
achieved or accomplished. Factors which could cause actual results to differ
materially from those anticipated include but are not limited to: general
economic, financial and business conditions; changes in government regulations
or regulatory policies; competition in the energy services sector; regional
weather conditions; the availability and cost of natural gas; development and
operating costs; the success and costs of advertising and promotional efforts;
the availability and terms of capital; the business abilities and judgment of
personnel; the ability of ProvGas' suppliers and customers to modify or redesign
their computer systems to work properly by the Year 2000; ProvGas' ability to
grow its business through customer growth; unanticipated environmental
liabilities; the costs and effects of unanticipated legal proceedings; the
impacts of unusual items resulting from ongoing evaluations of business
strategies and asset valuations; and changes in business strategy.

General
- -------

    The Registrant, a Rhode Island corporation, was organized in 1847 and became
a wholly-owned subsidiary of Providence Energy Corporation (Providence Energy)
through a reorganization on February 1, 1981.  The outstanding shares of common
stock of Providence Energy are presently listed on the New York Stock Exchange.

    The executive offices of the Registrant are located at 100 Weybosset Street,
Providence, Rhode Island 02903, telephone (401) 272-5040.

    The Registrant is engaged in natural gas distribution, serving approximately
166,000 customers in Providence and Newport, Rhode Island, and  23 other cities
and towns in Rhode Island.  The service territory encompasses approximately 730
square miles and has a population of approximately 817,000.  For the year ended
September 30, 1998, residential sales accounted for approximately 57% of total
firm deliveries, with commercial and industrial sales representing, in the
aggregate, approximately 43%.  For the years ended September 30, 1997 and 1996,
residential sales represented approximately 58% and 59%, respectively, with
commercial and industrial sales representing, in the aggregate, approximately
42% and 41%, respectively, of firm deliveries.

    The Registrant's gas distribution system consists of approximately 2,300
miles of gas mains ranging in size from 2 to 36 inches in diameter,
approximately 142,000 services (a service is a pipe connecting a gas main with
piping on a customer's premises), approximately 166,000 gas meters, and the
necessary pressure regulators.  The Registrant has regulating and metering
facilities at eight points of delivery from Algonquin Gas Transmission Company
(Algonquin) and one from Tennessee Gas Pipeline Company, which the Registrant
believes to be adequate for receiving gas into its distribution system.

                                      I-1
<PAGE>
 
    The natural gas industry is subject to numerous challenges, many of which
affect the Registrant in varying degrees.  Significant industry challenges
affecting the Registrant include:  the ability to adapt to the regulatory
changes occurring at the national level under the framework of the Federal
Energy Regulatory Commission (FERC) Order 636 and the ability to gain local
approval through the Rhode Island Public Utilities Commission (RIPUC) for new
rates tailored to customers' specific needs and market conditions.

Gas Supply
- ----------

    The Registrant has entered into a full requirements contract with Duke
Energy Trading and Marketing, L.L.C. (DETM) to provide all of its gas supply
needs beginning October 1, 1997 and continuing through September 30, 2000. DETM
provides all gas supplies required by the Registrant, while the Registrant is
committed to purchase all supplies exclusively from DETM. Supplies required by
the Registrant's firm sales customers are purchased at a single, fixed commodity
price for the entire contract period. In order to provide this service, DETM,
for the contract period, takes responsibility for the Registrant's pipeline
capacity resources not previously released, all storage contracts and all
Liquified Natural Gas (LNG) capacity. As a result, the Registrant's gas
inventories of approximately $18 million as of September 30, 1997 were sold at
book value to DETM on October 1, 1997. All supply resources assigned to DETM
will revert back to the Registrant on October 1, 2000.

    As well as providing supply for firm customers at a fixed price, DETM
provides gas at market prices to cover the Registrant's non-firm sales
customers' needs and to make up the supply imbalances of transportation
customers.  DETM also provides various other services to the Registrant's
transportation service customers including enhanced balancing, standby and the
storage and peaking services available under the Registrant's firm
transportation storage service in effect since December 1, 1997.  DETM receives
the supply-related revenues from these services in exchange for providing the
supply management inherent in these services.

    Included in the DETM contract are a number of other important features.  The
Registrant has retained the right to continue to make portfolio changes to
reduce supply costs.  To the extent the Registrant makes such changes the
Registrant must keep DETM whole for the value lost over the remainder of the
contract period. The contract relieves the Registrant of the need to perform
certain upstream supply management functions which makes it possible for the
Registrant to take on the additional supply management workload required by the
further unbundling of firm sales customers without major staffing additions.

    As a result of FERC Order 636 and other related orders (the Orders),
pipeline transportation companies have incurred significant costs, collectively
known as transition costs.  The majority of these costs will be reimbursed by
the pipeline's customers, including the Registrant. The Registrant estimates its
transition costs to be approximately $21.7 million, of which $16.2 million has
been included in the Gas Charge Clause (GCC) and collected from customers
through September 30, 1997.  At September 30, 1997, the remaining minimum
obligation of $5.5 million has been recorded in the accompanying Consolidated
Balance Sheets along with a regulatory asset anticipating future recovery.  As
part of the above supply contract, DETM assumed liability for these transition
costs during the contract's three-year term.  At the end of the three-year term
of the contract, the Registrant will assume any remaining liability, which is
not expected to be material.

                                      I-2
<PAGE>
 
Rates and Regulation
- --------------------

    The Registrant is subject to the regulatory jurisdiction of the RIPUC with
respect to rates and charges, standards of service, accounting and other
matters.  In August 1997, the RIPUC approved the Price Stabilization Plan
Settlement Agreement, (the Plan or Energize RI) among the Registrant, the Rhode
Island Division of Public Utilities and Carriers (the Division), The Energy
Council of Rhode Island (TEC-RI), and the George Wiley Center.  Effective
October 1, 1997 through September 30, 2000, Energize RI provides customers with
a price decrease of approximately four percent in addition to a three-year price
freeze.  Under Energize RI, the GCC will be suspended for the entire term.
Energize RI also requires the Registrant to make significant capital investments
to improve its distribution system. Capital investments required by Energize RI
are estimated to total approximately $26 million over the three-year term. In
addition, Energize RI requires the Registrant to fund the Low-Income Assistance
Program at an annual level of $.1 million, the Demand Side Management Program at
an annual level of $.5 million and the Low-Income Weatherization Program at an
annual level of $.2 million.  Energize RI also continues the process of
unbundling by requiring the Registrant to provide unbundled service offerings
for up to 10 percent per year of firm deliveries.

    As part of Energize RI, the Registrant will amortize approximately $4.0
million of environmental costs previously charged to the accumulated
depreciation reserve.  These costs and all environmental costs incurred during
the term of the Plan will be amortized over a 10-year period.  Also, in
connection with the Plan, the Registrant wrote off approximately $1.5 million of
previously deferred gas costs in October 1997.

    Under Energize RI the Registrant may earn up to 10.9 percent annually on its
average common equity of up to $81.0 million, $86.2 million and $92.0 million in
fiscal 1998, 1999, and 2000, respectively. In addition, the Registrant may not
earn less than a seven percent return on average common equity.  In the event
that the Registrant earns in excess of 10.9 percent or less than seven percent,
the Registrant will defer revenues or costs through a deferred revenue account
over the term of the Plan.  Any balance in the deferred revenue account at the
end of the Plan will be refunded to or recovered from customers in a manner
determined by all parties to the Plan and to be approved by the RIPUC.

    As part of Energize RI, the Registrant is permitted to file with the
Division for the recovery of the impact of exogenous Changes (Changes) which may
occur during the three-year term of the Plan.  Changes are defined as
"...significant increases or decreases in the Registrant's costs or revenues
which are beyond the Registrant's reasonable control."  Any disputes regarding
either the nature or quantification of the Changes are to be resolved by the
RIPUC.  The impact of any such Changes will be debited or credited to a
regulatory asset or liability account throughout the term of Energize RI and
will be recovered or refunded at the expiration of the Plan through a method to
be determined.

    During 1998, due to the extremely warm temperatures, the Registrant
experienced a margin loss of approximately $4.0 million.  The Registrant also
experienced a non-firm margin loss of approximately $2.2 million due to adverse
market prices of natural gas versus alternate fuels.  The Registrant believes
the causes of these two events were beyond its control and thus considers them
as Changes.  In 1999, the Registrant intends to file with the Division for
recovery of a portion of these losses.

                                      I-3
<PAGE>
 
    In 1998, the Registrant did not earn its allowed rate of return primarily as
a result of the extremely warm weather and the loss of non-firm margin.  Under
the Plan's design, which assumed normal weather, the Registrant should have had
earnings in year one of the Plan in excess of 10.9 percent.  The earnings in
excess of 10.9 percent were to be deferred in the deferred revenue account to
fund capital investments and other Plan commitments in the remaining two years
of the Plan.  Absent favorable recovery for the Changes as discussed above,
and/or other factors such as colder than normal weather, the Registrant's
ability to earn a 10.9 percent return on average common equity in future Plan
years is substantially impaired.

    In a decision issued September 1, 1998, the Division rejected allegations
made in a complaint brought by Aurora Natural Gas that the Registrant provided
advance information and undue preference in pricing to its marketing affiliate,
Providence Energy Services, Inc.  As part of its investigation, the Division
ordered marketer refunds of approximately $.3 million.  The Division ordered
this refund based on its belief that an unfair rate was charged to customers who
did not have operational telemeters in place when they began transporting gas.
The Registrant intends to pursue all available options in order to reverse this
decision.


Competition and Marketing
- -------------------------

    The Registrant experienced modest customer growth in both the residential
and commercial/industrial markets.  In all, the average annual number of
customers rose one percent to approximately 166,000.  This increase was achieved
in a local economy which is just now beginning to prosper.  Seasonally adjusted
unemployment stood at 4.9 percent in September 1998, down from 5.2 percent
twelve months earlier, and slightly above the national average of 4.6 percent.
Also, there is considerable new construction throughout the state, especially in
Providence, where the Providence Place Mall is expected to be completed by
August 1999, and six new hotels have been proposed.  A recent University of
Rhode Island study predicts economic stability in the state for the immediate
future.

    In addition to funding investments related to system integrity, Energize RI
provides opportunities for the Registrant to expand sales.  For example, high
pressure service to Quonset/Davisville Industrial Port & Commerce Park, a key
area for State economic development, provides tremendous opportunities for sales
growth as commercial and industrial businesses locate within the park.  In
addition, Demand Side Management (DSM), an equipment rebate program, provides
opportunities to expand sales to nontraditional applications, such as air
conditioning and fuel cells. The Registrant has redirected its sales and
marketing efforts to leverage Energize RI, as well as other opportunities to
promote sales growth within its service territory.

    In response to the large increase of both state-owned and private fleet
vehicles powered by natural gas, the Registrant invested approximately $.3
million to renovate its Providence "quick-fill" station for natural gas vehicles
- - one of three stations the Registrant operates in the state.  Fleet operators
throughout the region are expressing greater interest in alternative-fuel
vehicles.  One of these operators is the Rhode Island Public Transit Authority,
which recently launched a major program to replace a large number of its 200
diesel buses with buses that operate solely on natural gas. A new Rhode Island
law provides substantial tax incentives which, along with the Federal Department
of Energy's designation of Providence as a "clean city", should increase use and
awareness of the benefits of natural gas vehicles.

                                      I-4
<PAGE>
 
    In May 1996, the RIPUC approved a Rate Design Settlement Agreement (the
Agreement) among the Registrant, the Division, TEC-RI, and a consortium of oil
heat organizations.  The Agreement began a process of unbundling natural gas
service in Rhode Island, enabling customers to choose their gas suppliers.

    The Agreement went into effect in June 1996. The initial phase of unbundling
was made available to approximately 120 of the largest commercial and industrial
customers. In August 1997, the RIPUC approved a plan, called Business Choice, to
further unbundle services to an additional 3,400 medium and large commercial and
industrial customers. The Registrant commenced Business Choice in December 1997.
Energize RI continues the process of unbundling by requiring the Registrant to
provide unbundled service offerings for up to 10 percent per year of firm
deliveries.  At the conclusion of the latest enrollment period on October 1,
1998, an additional 530 customers had signed up for Business Choice.  The
program now has approximately 1,500 firm transportation customers with annual
deliveries of over 5 billion cubic feet per year which is approximately 25
percent of the Registrant's total annual firm deliveries.  There are 14
different marketers serving the Registrant's customers and transporting on the
system.

    In 1996, the Registrant implemented a Demand Side Management (DSM) Program,
which furnishes rebates to customers installing new technologies, such as gas
fired air conditioning, cogeneration and gas motors.  These technologies use
proportionately more natural gas during the summer months, when the distribution
system has available capacity.  The DSM program also allows for the utilization
of existing resources, such as mains, services and year-round supply contracts.
This DSM Program will continue to be funded under Energize RI.

Employees
- ---------

    As of September 30, 1998, the Registrant had 544 full-time employees.
Approximately 269 production, distribution and customer service employees are
covered by a five-year collective bargaining agreement with Local 12431-01 of
the United Steelworkers of America, which became effective in January 1996.

    The bargaining agreement was developed by a labor-management negotiations
committee and can be reopened for any reason at any time in order to allow for
the committee to deal with new issues as they arise, which results in increased
flexibility in the use of employees. The original agreement called for a general
wage increase of 3.25 percent each year from 1997 to 2000.

    In April 1998 the contract with Local 12431-01 was renegotiated and extended
to January 2002. This negotiation provides for a 3.5% wage increase in January
1999, January 2000, and January 2001.

    Additionally, in March 1996, a 38 month Labor Agreement was ratified by
Local 12431-02 of the United Steelworkers of America, which represents
approximately 90 office and clerical employees.  The agreement called for an
average increase of 2.9 percent for 1998.

    In April 1998 the contract with Local 12431-02 was renegotiated and extended
to May 2002. This negotiation provides for a 3.5% wage increase in June 1999,
June 2000, and June 2001.

Special Factors Affecting the Natural Gas Industry
- --------------------------------------------------

General
- -------

    The natural gas industry is subject to numerous legislative and regulatory
requirements, standards and restrictions that are subject to change and that
affect the Registrant to varying degrees.  Significant industry factors that
have affected or may affect the Registrant from time to time include:

                                      I-5
<PAGE>
 
lack of assurance that rate increases can be obtained from regulatory
authorities in adequate amounts on a timely basis; changes in the regulations
governing the Registrant's operations; reductions in the prices of oil and
propane, which can make those fuels less costly than natural gas in some
markets; and increases in the price of natural gas.

FERC Regulations
- ----------------

    In recent years the FERC has been attempting to increase competition with
regard to the transportation and sale of natural gas in interstate commerce.
Beginning in late 1985, FERC began promulgating orders allowing all industry
participants access to pipeline transportation on an open, nondiscriminatory
basis to the extent of available capacity.

    Recent FERC orders are in furtherance of its policy to make gas
transportation and alternate supply sources more accessible to all parties,
including local distribution companies and their customers.  Such open access
allows the Registrant to obtain its supply through a more competitive national
gas pipeline system, where and when capacity is available.

    FERC Order 636 and other related orders (the Orders) have significantly
changed the structure and types of services offered by pipeline transportation
companies.  The most significant components of the restructuring occurred in
November 1993.  In response to these changes, the Registrant successfully
negotiated new pipeline transportation and gas storage contracts.

    At the same time, a number of contracts with gas suppliers have been
negotiated to complement the transportation and storage contracts.  The
portfolio of supply contracts was designed to be market responsive and
diversified with respect to contract lengths, source location, and other
contract terms.

    To meet the requirements of the Orders, the pipelines have incurred
significant costs, collectively known as transition costs.  The majority of
these costs will be reimbursed by the pipelines' customers, including the
Registrant.  The Registrant anticipates its transition costs to be approximately
$21.7 million, of which $16.2 million has been included in the GCC and collected
from customers through September 30, 1997. At September 30, 1997, the remaining
minimum obligation of $5.5 million has been recorded in the accompanying
Consolidated Balance Sheets (filed herewith as Item 8) along with a regulatory
asset anticipating future recovery. As part of the supply contract with DETM,
which was effective October 1, 1997, DETM assumed liability for these transition
costs during the contract's three-year term.  At the end of the three-year term
of the contract, the Registrant will assume any remaining liability, which is
not expected to be material.

Environmental Regulations
- -------------------------

    Federal, state and local laws and regulations establishing standards and
requirements for the protection of the environment have increased in number and
in scope in recent years.  The Registrant cannot predict the future impact of
such standards and requirements, which are subject to change and can take effect
retroactively.  The Registrant continues to monitor the status of these laws and
regulations.  Such monitoring involves the review of past activities and current
operations, and may include expending funds to investigate or clean up certain
sites.  To the best of its knowledge, subject to the following, the Registrant
believes it is in substantial compliance with such laws and regulations.

    At September 30, 1998, the Registrant was aware of five sites at which
future costs may be incurred.

                                      I-6
<PAGE>
 
    The Registrant has been designated as a potentially responsible party (PRP)
under the Comprehensive Environmental Response Compensation and Liability Act of
1980 at two sites in Plympton, Massachusetts on which waste material is alleged
to have been deposited by disposal contractors employed in the past either
directly or indirectly by the Registrant and other PRPs.  With respect to one of
the Plympton sites, the Registrant has joined with other PRPs in entering into
an Administrative Consent Order with the Massachusetts Department of
Environmental Protection. The costs to be borne by the Registrant, in connection
with both Plympton sites, are not anticipated to be material to the financial
condition of the Registrant.

    During 1995, the Registrant began a study at its primary gas distribution
facility located in Providence, Rhode Island.  This site formerly contained a
manufactured gas plant operated by the Registrant. As of September 30, 1998,
approximately $2.0 million was spent primarily on studies at this site.  In
accordance with state laws, such a study is monitored by the Rhode Island
Department of Environmental Management (DEM).  The purpose of this study was to
determine the extent of environmental contamination at the site.  The Registrant
has completed the study which indicated that remediation will be required for
two-thirds of the property.  The remediation is expected to begin in February
1999 and will continue for a duration of three to six months.  During the
remediation process, the remaining one-third of the property will also be
investigated and remediated if necessary.

    At September 30, 1998, the Registrant compiled a preliminary range of costs,
based on removal and off-site disposal or recycling of contaminated soil,
ranging from $1.8 million to in excess of $5.0 million.  However, because of the
uncertainties associated with environmental assessment and remediation
activities, the future cost of remediation could be higher than the range noted.
Based on the proposals for remediation work, the Registrant has accrued $1.8
million at September 30, 1998, for anticipated future remediation costs at this
site.

    Tests conducted following the discovery of an abandoned underground oil
storage tank at the Registrant's Westerly, Rhode Island operations center in
1996 confirmed the existence of contaminants at this site. The Registrant is
currently conducting tests at this site, the costs of which are being shared
equally with the prior owner, to determine the nature and extent of the
contamination.  Due to the early stages of investigation, management cannot
offer any conclusions as to whether any remediation will be required at this
site.  In addition, in 1997, contamination from scrapped meters and regulators
was discovered at this site.  The Registrant has reported this to DEM and the
Rhode Island Department of Health and is in the process of remediation.  It is
anticipated that remediation will cost approximately $10,000. Accordingly, the
Registrant has accrued $10,000 at September 30, 1998 for anticipated future
remediation costs.

    In November 1998 the Registrant received a letter of responsibility from DEM
relating to possible contamination on previously-owned property on Allens Avenue
in Providence.  The current owner of the property has been similarly notified.
The Registrant lacks sufficient information at this time to determine the
validity of the claim, the amount of the clean-up costs or any defenses which
may be available with respect to such claim.

    In prior rate cases filed with the RIPUC, the Registrant requested that
environmental investigation and remediation costs be recovered by inclusion in
its depreciation factors consistent with the rate recovery treatment for all
types of cost of removal.  Due to the magnitude of the Registrant's

                                      I-7
<PAGE>
 
environmental investigation and remediation expenditures, the Registrant sought
current recovery for these amounts.  As a result, in accordance with the Price
Stabilization Plan Settlement Agreement described in "Rates and Regulation,"
effective October 1, 1997, all environmental investigation and remediation costs
incurred through September 30, 1997, as well as all costs incurred during the
three-year term of the Plan, will be amortized over a ten-year period.
Additionally, it is the Registrant's practice to consult with the RIPUC on a
periodic basis when, in management's opinion, significant amounts might be
expended for environmental-related costs.  As of September 30, 1998, the
Registrant charged environmental assessment and remediation costs of $2.6
million and an estimated $1.8 million to the accumulated depreciation reserve
and has amortized $.4 million of these costs.

    Management has begun discussions with other parties who may assist the
Registrant in paying any future costs at the above sites. Management believes
that its program for managing environmental issues, combined with rate recovery
and financial contributions from others, will likely avoid any material adverse
effect on its results of operations or its financial condition as a result of
the ultimate resolution of the above sites.

Other Standards
- ---------------

    The Registrant is also subject to standards prescribed by the Secretary of
Transportation under the Natural Gas Pipeline Safety Act of 1968 with respect to
the design, installation, testing, construction and maintenance of pipeline
facilities.  The enforcement of these standards has been delegated to the RIPUC
and management believes that the Registrant is in substantial compliance with
all present requirements imposed by such agency.

                                      I-8
<PAGE>
 
ITEM 2. PROPERTIES
- ------------------

    In addition to the Registrant's gas distribution system and storage
facilities, which constitute the principal properties of the Registrant, the
Registrant owns several buildings and other facilities in Newport, Providence
and Westerly that house its offices and provide floor space for its distribution
and maintenance facilities.

    Substantially all the foregoing properties are mortgaged as collateral for
the outstanding First Mortgage Bonds of the Registrant.

ITEM 3. LEGAL PROCEEDINGS
- -------------------------

    The Registrant is involved in legal and administrative proceedings in the
normal course of business, including certain proceedings involving material
amounts in which claims have been or may be made.  However, management believes,
after review of insurance coverage and consultation with legal counsel, that the
ultimate resolution of the legal proceedings to which it is or can at the
present time be reasonably expected to be a party, will not have a materially
adverse effect on the Registrant's results of operations or financial condition.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
- -----------------------------------------------------------

    Not applicable.

                                      I-9

                                        

                            
<PAGE>
 
                                    PART II
                                    -------


ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
- ---------------------------------------------------------------------
        MATTERS
        -------

     Not applicable.  The Registrant is a wholly-owned subsidiary of Providence
Energy Corporation.

                                      II-1
<PAGE>
 
ITEM 6. SELECTED FINANCIAL DATA
- -------------------------------

                          THE PROVIDENCE GAS COMPANY
                          --------------------------
                            SELECTED FINANCIAL DATA
                            -----------------------
                             SUMMARY OF OPERATIONS
                             ---------------------
                       FOR THE YEARS ENDED SEPTEMBER 30
                       --------------------------------

<TABLE>
<CAPTION>
                                1998      1997      1996      1995      1994  
                              --------  --------  --------  --------  --------
                                   (Thousands, except per share amounts)      
<S>                           <C>       <C>       <C>       <C>       <C>     
Operating revenues            $184,026  $210,673  $210,601  $180,043  $219,143
Cost of gas sold                91,648   117,357   118,051    98,985   133,315
                              --------  --------  --------  --------  --------
Operating margin                92,378    93,316    92,550    81,058    85,828
                              --------  --------  --------  --------  --------
Operating expenses,                                                           
  excluding taxes               59,296    59,540    59,673    53,536    54,588
Taxes, other than income        13,092    13,456    12,831    11,597    12,413
Federal income taxes             4,342     4,489     4,418     3,027     4,369
                              --------  --------  --------  --------  --------
Total operating expenses        76,730    77,485    76,922    68,160    71,370
                              --------  --------  --------  --------  --------
                                                                              
Operating income                15,648    15,831    15,628    12,898    14,458
Other, net                         584       371       976       798       409 
                              --------   -------   -------   -------   ------- 
Income before interest                                                        
expense                         16,232    16,202    16,604    13,696    14,867
Interest expense                 7,473     7,431     7,294     7,181     6,121
                              --------   -------   -------   -------   -------
Net income                       8,759     8,771     9,310     6,515     8,746
Dividends on preferred stock      (487)     (626)     (696)     (696)     (696)
                              --------   -------   -------   -------   ------- 
Net income applicable to                                                      
 common stock                    8,272     8,145     8,614     5,819     8,050
Common dividends                 4,776     4,777     4,627     4,577     4,501 
                              --------  --------  --------  --------  -------- 
Income reinvested in                                                          
 the corporation              $  3,496  $  3,368  $  3,987  $  1,242  $  3,549
                              ========  ========  ========  ========  ======== 
Weighted average common                                                       
 shares outstanding            1,243.6   1,243.6   1,243.6   1,243.6   1,243.6
                              ========  ========  ========  ========  ========
Earnings per common share     $   6.65  $   6.55  $   6.93  $   4.68  $   6.47
                              ========  ========  ========  ========  ========
Common dividends              $   3.84  $   3.84  $   3.72  $   3.68  $   3.62
                              ========  ========  ========  ========  ======== 
</TABLE> 

                             OTHER FINANCIAL DATA
                             --------------------
                                 SEPTEMBER 30
                                 ------------

<TABLE>
<CAPTION>
                                       1998      1997      1996      1995      1994
                                     --------  --------  --------  --------  --------
                                          (Thousands, except per share amounts)
<S>                                  <C>       <C>       <C>       <C>       <C>
Gas plant-at original cost           $313,549  $290,614  $270,149  $253,438  $230,926
Gas plant-net of depreciation         193,451   181,979   171,453   161,956   151,394
Total assets                          228,614   242,143   237,515   214,727   221,177
Capitalization:                                
  Long-term debt                       78,021    72,372    72,455    74,482    60,078
  Redeemable cumulative preferred              
    stock                               4,800     6,400     8,000     8,000     8,000
  Common Stockholder's investment      81,641    78,240    74,844    71,020    69,841
Shares of common stock at year-
  end                                 1,243.6   1,243.6   1,243.6   1,243.6   1,243.6
Book value per share                 $  65.65  $  62.91  $  60.18  $  57.11  $  56.16 
                                     ========  ========  ========  ========  ========   
</TABLE> 

                                      II-2
<PAGE>
 
Item 7
- ------
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS

Summary
- -------

    The Registrant's current operating revenues, operating margin and net income
have decreased over last year, as shown in the table below:

<TABLE>
<CAPTION>
                                           (000's)
                                                     Percent
                        1998      1997     Change     Change
                      --------  --------  ---------  --------
<S>                   <C>       <C>       <C>        <C>
Operating revenues    $184,026  $210,673  $(26,647)    (12.6)
 
Operating margin        92,378    93,316      (938)     (1.0)
 
Net income               8,759     8,771       (12)      (.1)
</TABLE>

RESULTS OF OPERATIONS - 1998 VS 1997

Operating Margin
- ----------------

    During the current year, the Registrant experienced weather that was 8.0
percent warmer than last year. The warmer temperatures resulted in decreased
margin of approximately $4.0 million compared to last year.  Offsetting the
warmer than normal weather was $7.2 million of margin generated under the Price
Stabilization Plan Settlement Agreement (Energize RI or the Plan), which became
effective October 1, 1997.  The components of this additional margin include
$10.4 million associated with adjusting the Gas Charge Clause (GCC) mechanism,
offset by the funding of the Low-Income and Demand Side Management programs of
$1.7 million and the write-off of $1.5 million of previously deferred gas costs.
In the prior year, the Registrant funded the Demand Side Management and Low-
Income Weatherization programs under the Integrated Resource Plan (IRP) for $.7
million.

    Additionally, non-firm margin decreased approximately $2.2 million when
compared with last year.  Prior to Energize RI, the Registrant was allowed to
recover approximately $3.0 million in non-firm margin under the terms of the
IRP, subject to the Registrant's ability to generate sufficient gas cost savings
for customers. As a result of Energize RI, the Registrant retains the actual
non-firm margin earned.  Due to an unfavorable pricing difference between
natural gas and alternate fuels, the Registrant experienced a decrease in non-
firm sales and transportation margin.

    As part of Energize RI, the performance-based ratemaking mechanism
(Mechanism) under the IRP was terminated in September 1997.  In 1997, the
Registrant recorded $1.5 million in additional margin as a result of this
Mechanism.  Thus, a decrease in margin from 1997 to 1998 occurred because this
Mechanism was no longer available in 1998.

    In a decision issued September 1, 1998, the Rhode Island Division of Public
Utilities and Carriers (Division) rejected allegations made in a complaint
brought by Aurora Natural Gas that the Registrant provided advance information
and undue preference in pricing to its marketing affiliate, Providence Energy
Services, Inc.  As part of the Division's investigation, the Division ordered
marketer refunds of approximately $.3 million.  The Division ordered this refund
based on its belief that an unfair rate was charged to customers who did not
have operational telemeters in place when they began transporting gas.  The
Registrant intends to pursue all available options in order to reverse this
decision.

                                      II-3
<PAGE>
 
Operating and Maintenance Expenses
- ----------------------------------

    Overall, operating and maintenance expenses decreased approximately $1.3
million or 2.8 percent versus last year. This decrease is primarily attributable
to a decrease in the Registrant's bad debts.  The decrease in bad debts was
attributable to improved collection experience and the implementation of new
credit policies, as well as decreased operating revenues from warmer than normal
weather.  The Registrant's other operating and maintenance expenses were
essentially flat due to cost management.

    The Registrant continually reviews its operating expenses in order to keep
expenses as low as possible; however, expenses can vary from year to year.

Depreciation and Amortization Expense
- -------------------------------------

    Depreciation and amortization expense increased approximately $1.1 million
or 8.7 percent versus last year.  This increase is the result of increased
capital spending for Energize RI commitments as well as the amortization of
previously deferred environmental costs. Effective October 1, 1997, the
Registrant began amortizing environmental costs over a ten-year period in
accordance with Energize RI.  Due to expected future increases in environmental
expenditures, which were projected under Energize RI, the Registrant will have
increased environmental amortization expense in future years.

Taxes
- -----

    Taxes decreased approximately $.5 million or 2.8 percent versus last year.
The overall change in taxes is primarily due to a decrease in gross earnings tax
as a result of the warmer weather experienced this year as compared to last
year.  The decrease was partially offset by an increase in local property taxes
as a result of capital spending.

Other, net
- ----------

    Other, net has increased approximately $.2 million or 57.4 percent versus
last year.  The increase consists of approximately $.2 million of interest
income earned on Federal income tax refunds resulting from amended tax returns.

Interest Expense
- ----------------

    Interest expense for 1998 was flat when compared to 1997.  The Registrant's
long-term interest expense increased by approximately $.3 million as a result of
the Series S First Mortgage Bond issuance in April 1998.  Offsetting the
increase was a decrease in weighted average short-term borrowings, as a result
of the Series S First Mortgage Bond issuance, which caused short-term interest
expense to decrease.

FUTURE OUTLOOK
- --------------

A)  Regulatory

    Under Energize RI, the Registrant may earn up to 10.9 percent annually on
its average common equity of up to $81.0 million, $86.2 million, and $92.0
million in fiscal 1998, 1999 and 2000, respectively.  In addition, the
Registrant may not earn less than a seven percent return on average common
equity.  In the event that the Registrant earns in excess of 10.9 percent or
less than seven percent, the Registrant will defer revenues or costs through a
deferred revenue account over the term of the Plan.  Any balance in the deferred
revenue account at the end of the Plan will be refunded to or recovered from
customers in a manner to be determined by all parties to the Plan and to be
approved by the Rhode Island Public Utilities Commission (RIPUC).

                                      II-4
<PAGE>
 
    The implementation of Energize RI this year changed how the Registrant
recorded its gas costs, resulting in higher margin reflected in the first half
of the fiscal year and lower margin in the second half. This change did not
impact annual earnings.

    As part of Energize RI, the Registrant is permitted to file with the
Division for the recovery of the impact of exogenous Changes (Changes) which may
occur during the three-year term of the Plan. Changes are defined as
"...significant increases or decreases in the Registrant's costs or revenues
which are beyond the Registrant's reasonable control."  Any disputes regarding
either the nature or quantification of the Changes are to be resolved by the
RIPUC.  The impact of any such Changes will be debited or credited to a
regulatory asset or liability account throughout the term of Energize RI and
will be recovered or refunded at the expiration of the Plan through a method to
be determined.

    During 1998, due to the extremely warm temperatures, the Registrant
experienced a margin loss of approximately $4.0 million.  The Registrant also
experienced a non-firm margin loss of approximately $2.2 million due to adverse
market prices of natural gas versus alternate fuels.  The Registrant believes
the causes of these two events were beyond its control and thus considers them
as Changes. In fiscal 1999, the Registrant intends to file with the Division for
recovery of a portion of these losses.

    In 1998, the Registrant did not earn its allowed rate of return primarily as
a result of the extremely warm weather and the loss of non-firm margin as
previously discussed in "Operating Margin".  Under the Plan's design, which
assumed normal weather, the Registrant should have had earnings in year one of
the Plan in excess of 10.9 percent.  The earnings in excess of 10.9 percent were
to be deferred in the deferred revenue account to fund capital investments and
other Plan commitments in the remaining two years of the Plan.  Absent favorable
recovery for the Changes discussed above, and/or other factors such as colder
than normal weather, the Registrant's ability to earn a 10.9 percent return on
average common equity in future Plan years is substantially impaired.

    In May 1996, the RIPUC approved a Rate Design Settlement Agreement (the
Agreement) among the Registrant, the Division, TEC-RI, and a consortium of oil
heat organizations.  The Agreement began a process of unbundling natural gas
service in Rhode Island, enabling customers to choose their gas suppliers.

    The Agreement went into effect in June 1996. The initial phase of unbundling
was available to approximately 120 of the largest commercial and industrial
customers. In August 1997, the RIPUC approved a plan, called Business Choice, to
further unbundle services to an additional 3,400 medium and large commercial and
industrial customers. The Registrant commenced Business Choice in December 1997.
Energize RI continues the process of unbundling by requiring the Registrant to
provide unbundled service offerings for up to 10 percent per year of firm
deliveries.  At the conclusion of the latest enrollment period on October 1,
1998, an additional 530 customers had signed up for Business Choice.  The
program now has approximately 1,500 firm transportation customers with annual
deliveries of over 5 billion cubic feet per year which is approximately 25
percent of the Registrant's total annual firm deliveries.  There are 14
different marketers serving the Registrant's customers and transporting on the
system.

                                      II-5
<PAGE>
 
B)  Business Opportunities

    In addition to funding investments related to system integrity, Energize RI
provides opportunities for the Registrant to expand sales. For example, high
pressure service to Quonset/Davisville Industrial Port & Commerce Park, a key
area for State economic development, provides tremendous opportunities for sales
growth as commercial and industrial businesses locate within the park.  In
addition, Demand Side Management, an equipment rebate program, provides
opportunities to expand sales to nontraditional applications, such as air
conditioning and fuel cells.  The Registrant has redirected its sales and
marketing efforts to leverage Energize RI, as well as other opportunities to
promote sales growth within its service territory.

C)  New Accounting Pronouncements

    Please refer to Footnote 10 of the accompanying Consolidated Financial
Statements.

RESULTS OF OPERATIONS - 1997 VERSUS 1996

Operating Margin
- ----------------

    During 1997, the Registrant experienced normal weather as opposed to colder-
than-normal weather in 1996, which resulted in 1997 temperatures that were 5.2
percent warmer than 1996.  The decrease in heating load due to the warmer
temperatures resulted in decreased margin of approximately $1.7 million, which
was offset by increased margin of $.7 million as a result of load growth and an
increase in the customer base of 1,601 or 1.0 percent.  Primarily as a result of
the warmer temperatures experienced in 1997, residential sales decreased 565
million cubic feet (MMcf) or 4.0 percent.  The Registrant's commercial and
industrial firm sales decreased approximately 1,598 MMcf, or 16.9 percent as a
result of warmer weather and customer migrations from sales service to
transportation service in connection with unbundling natural gas service in
Rhode Island.  In 1996, approximately 120 of the largest commercial and
industrial customers were eligible for unbundled service offerings.  In December
1997, an additional 3,400 large and medium commercial and industrial customers
were eligible.  This migration of customers to transportation did not have a
material effect on margin.

    The decrease due to weather was also offset by increases in margin of $.8
million as a result of the rate increase effective December 17, 1995 and $.4
million as the result of an increase in revenues associated with the phase-in of
post-retirement expenses related to Statement of Financial Accounting Standards
No. 106.

    Interruptible and other volumes remained consistent with last year.
Operating margin from interruptible and other sales did not affect the
Registrant's operating margin or results of operations because the RIPUC
required the Registrant to return any margins earned from these non-firm
customers to firm customers through the GCC. Beginning October 1, 1997, under
Energize RI as discussed in Note 9 to the accompanying Consolidated Financial
Statements, the Registrant will retain all margins earned from these non-firm
sales.

    The Registrant's transportation volumes increased approximately 1,345 MMcf
as the result of the unbundling process described above.  As the unbundling
process continues, the Registrant expects transportation revenues and volumes
will continue to increase as customers migrate from sales to transportation.

                                      II-6
<PAGE>
 
Operating and Maintenance Expenses
- ----------------------------------

    Overall, operating and maintenance expenses have decreased approximately
$1.0 million, or 2.0 percent, versus 1996.  The Registrant had an $.8 million
decrease in outside services due to expenditures made in 1996 to develop new
energy service offerings as well as expenses related to the IRP.  This decrease
was offset by an increase in the Registrant's labor of $.8 million related to
cost of living and negotiated union contract increases.  This increase in labor
was offset by an increase in capitalized labor and administrative expenses of
$.7 million.  This increase was the result of increased capital projects in 1997
as well as an increase in expenses allocated to capital projects.  The
Registrant also incurred increased post-retirement benefit expenses of $.3
million as the result of the continued phasing of these expenses into the
Registrant's rates in 1997.  The remaining decrease of $.6 million relates
primarily to cost management by the Registrant.

Depreciation and Amortization
- -----------------------------

    Depreciation and amortization expense increased approximately $.8 million,
or 7.3 percent, primarily as the result of capital additions, including
technology related assets with shorter depreciable lives as well as an increase
in depreciation rates that became effective with the rate increase on December
17, 1995.

Taxes
- -----

    Taxes increased approximately $.7 million, or 4.0 percent, primarily as a
result of increased property taxes due to increased capital spending as well as
increased property tax rates in 1997.

Other, net
- ----------

    Other, net decreased approximately $.6 million.  The decrease was primarily
due to regulatory changes of $.9 million in 1996 as the result of the rate
decision effective December 17, 1995 offset by increases in the allowance for
funds used during construction of $.2 million as the result of increased capital
spending.

Interest Expense
- ----------------

    Interest expense for 1997 was flat when compared to 1996.  Interest expense
increased approximately $.2 million primarily as the result of an increase in
interest on long-term debt due to the issuance of Series R First Mortgage Bonds
in December of 1995.

LIQUIDITY AND CAPITAL RESOURCES

    The Registrant meets seasonal cash requirements and finances its capital
expenditures program on an interim basis through short-term borrowings.
Management believes its available financings are sufficient to meet these
seasonal needs.

    During the current year, the Registrant's cash flow from operations
increased approximately $13.1 million compared to the same period last year.
This increase was primarily due to the sale of the Registrant's working gas in
storage to Duke Energy Trading and Marketing, L.L.C. as well as the impact of
Energize RI changes.

                                      II-7
<PAGE>
 
    Capital expenditures for 1998 of approximately $27.5 million increased
$7.3 million or 35.8 percent when compared to the $20.2 million last year.  As
part of Energize RI, the Registrant's spending increased as a result of making
significant capital improvements to its distribution system.  These improvements
will expand the distribution system into economically-developing areas of Rhode
Island, as well as accelerate the replacement of older mains and services.
Additional expenditures relating to the Registrant's decision to move to a
client server environment, as well as to computerize existing paper records of
its distribution system, have also contributed to this increase.  Anticipated
capital expenditures during the next two fiscal years are expected to total
approximately $57.1 million.

    To finance capital expenditures, the Registrant issued $15 million of Series
S First Mortgage Bonds in April 1998 at a rate of 6.82 percent.  These bonds
require semi-annual interest payments and a lump sum repayment of principal in
20 years.

    To reduce its long-term borrowing costs, the Registrant repurchased $6.4
million of Series M First Mortgage Bonds in September 1998.  The cost to
repurchase was comprised of $6.4 million in principal and $1.4 million in
premium.  The Registrant is planning to issue $15 million in First Mortgage
Bonds to cover the cost of the repurchase as well as for general corporate
purposes.  The future bond issuance is anticipated to be for a 30 year term at
an interest rate expected to be less than 7.0 percent.  The Registrant estimates
savings of approximately $1.8 million over the life of the new debt based on a
projected interest rate of 6.75 percent.  The Registrant has received an order
from the Division which permits the amortization of the bond premium over the
life of the new debt.


YEAR 2000 DISCLOSURE

    Many companies' software programs and computing infrastructure use two-digit
years to define the applicable year, rather than four-digit years, and have
time-sensitive software that may recognize a date using "00" as the last two
digits of the year 1900, rather than the year 2000.  This could result in the
computer or embedded hardware shutting down or performing incorrect
computations. On July 29, 1998, the Securities and Exchange Commission issued an
Interpretation entitled "Disclosure of Year 2000 Issues and Consequences by
Public Companies, Investment Advisers, Investment Companies, and Municipal
Securities Issuers", calling for extensive detailed reporting and disclosure of
a company's progress in addressing the Year 2000 impact.  Pursuant to this
Interpretation, the Registrant is providing the following disclosure.

READINESS

    The Registrant recognizes that the products and services that the Registrant
provides to its customers are essential.  The Year 2000 computer problem poses a
significant challenge to the Registrant's ability to continue to provide these
products and services.  Senior management has made Year 2000 readiness a top
priority, and in response to that challenge, has established a Year 2000 Project
Office to ensure the continuity of mission critical business systems and
processes before and beyond the Year 2000.  The Registrant has hired two
international consulting firms to assist the Registrant in the areas of
assessment, strategy, staffing and the selection and execution of a recognized
methodology to assess Year 2000 readiness.  The Project Office oversees work in
the following four areas:

                                      II-8
<PAGE>
 
1.  Information Technology (IT) Systems
    -----------------------------------

    The Registrant continues to implement its technology plan developed in 1992
which includes the migration from a mainframe centric to a client server centric
environment.  The migration includes the replacement of the Customer Information
System (CIS) which supports the business function of customer inquiry, service
orders and billing.  The Plan also includes the replacement of its business
applications such as financial, human resources and procurement with an
Enterprise Resource Planning (ERP) system. These new systems have been
represented by the suppliers to be Year 2000 ready.  The migration to CIS and
ERP, including testing of these new systems, is expected to be completed by June
30, 1999.

    The Registrant has completed an inventory of its remaining IT systems and is
in the process of assessing these systems. The Registrant is preparing
procurement policies as part of its efforts to ensure Year 2000 readiness for
any future changes to its IT systems environment or future acquisitions of IT
systems.

2.  Embedded Systems
    ----------------

    The Registrant is working with an international management consulting and
engineering firm with industry-specific experience to address the Year 2000
readiness of embedded microprocessors deployed in its distribution and facility
operations.  The distribution area covers, but is not limited to, the
monitoring, storage, measurement and control of the flow of natural gas.  The
facility area covers, but is not limited to, back-up power supply, heat and air
conditioning, and security at the Registrant's offices.

    The Registrant has completed reviewing 99 percent of its embedded components
inventory.  This inventory has been loaded into the Registrant's database and
has been matched against the consultant's proprietary database to assess which
components are Year 2000 ready.  The consultant's proprietary database contains
important information collected by the consultant through its industry network.
To date, the consultant's database immediately identified 69 percent of the
components.  Ninety-four percent of the identified components were determined to
be compliant and six percent were determined to be non-compliant.  The
components associated with the Registrant's mission critical systems have been
identified in the database, and many of these components are compliant.
Remediation planning is underway to address the remaining components. The
Registrant will work closely with the consultants to assess the segment of
components that could not be matched or identified in the consultant's
proprietary database.  This work includes direct follow-up with the
manufacturers of those components.  This assessment is expected to be completed
by December 1998 at which point the Registrant can better evaluate the impact of
any system failure.  Remediation and testing of mission critical systems is
scheduled to be completed by June 30, 1999 and remediation and testing of all
other embedded systems is planned to be completed by September 30, 1999.

3.  Upstream/Downstream
    -------------------

    The Registrant has developed a communication plan to keep its shareholder,
customers, employees, and other major constituencies informed about the
Registrant's plans and the state of readiness concerning the Year 2000 computer
problem. The Registrant has developed a plan to address the readiness of its
major suppliers which includes a combination of written requests, telephone
interviews, and leveraging of customer groups and site visits. The Registrant is
actively participating with the Rhode Island Y2K (Year 2000) Group which acts as
a communication forum for key customers as well as the other essential suppliers
of services such as: telecommunications, water and electric. The Registrant
expects to have its assessment of its supply chain completed by January 31,
1999. The Registrant's strategy includes the continual monitoring of any risk
areas that surface as a result of that assessment.

                                      II-9
<PAGE>
 
4.  Contingency Planning
    --------------------

    The Registrant has contingency plans in place for response to certain
emergency operational situations.  However, the Registrant intends to begin
developing actionable contingency plans pertinent to the Year 2000 computer
problem following substantial completion of the assessment of its systems and
third party relationships. Representatives from the Registrant are participating
in industry consortiums related to contingency planning.  The planning will
factor the results of the risk assessments in the three areas mentioned above,
taking into account the major business processes of the Registrant.  The
Registrant expects its Year 2000 contingency plans to be finalized and in place
by June 30, 1999.

YEAR 2000 COSTS

    The Registrant expects to complete its comprehensive budget for all phases
of its Year 2000 effort by January 31, 1999.  The Registrant will capitalize
Year 2000 costs with a five-year amortization period as part of the regulatory
treatment approved by the RIPUC under the Registrant's Energize RI program.  As
of September 30, 1998, the Registrant has deferred Year 2000 costs of $2.5
million.  The Registrant estimates the cost of the assessment phase of its Year
2000 effort to be less than $1 million.  The Registrant does not yet have a cost
estimate applicable to remediation at this time.

POTENTIAL RISKS

    The Registrant must complete its migration to a client server environment
and must complete the implementation of CIS and ERP and the upgrade of its
System Control and Data Acquisition software application.  Although the
Registrant expects to achieve these goals in a timely manner, the Registrant
cannot guarantee these results.  A delay in completing these projects or the
inability of any of these systems to perform their respective fundamental
functions would result in the Registrant experiencing significant business
disruption.

    The majority of the Registrant's natural gas supply is delivered over third-
party interstate transmission lines from the Gulf coast to Rhode Island. These
interstate transmission lines use many compressor stations to move the gas.
These compressor stations are controlled and monitored remotely, each station
using hundreds of embedded components.  If these embedded systems reach critical
failure without manual backup, the Registrant will experience an indeterminate
amount of gas supply loss.  Although the Registrant expects the natural gas
delivery systems to operate in the Year 2000, the Registrant cannot guarantee
this will occur.  If the loss of gas supply exceeds the Registrant's access to
its reserves in storage and its liquefied natural gas capability, the Registrant
will not be able to serve certain customer segments.  The Registrant's inability
to serve its customers would result in a loss of revenue and potential claims.

                                     II-10
<PAGE>
 
ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
- ----------------------------------------------------

 
                          THE PROVIDENCE GAS COMPANY
                          --------------------------    
                          CONSOLIDATED BALANCE SHEETS
                          ---------------------------    
                                 SEPTEMBER 30
                                 ------------  

<TABLE> 
<CAPTION> 
                                                           1998         1997
                                                           ----         ----
                                                       (Thousands of Dollars)
     ASSETS
     ------
<S>                                                    <C>            <C>  
Gas plant, at original cost (notes 1, 4, 7 and 9)       $313,549      $290,614
 Less - Accumulated depreciation and
    plant acquisition adjustments (notes 1 and 9)        119,916       108,478
                                                        --------      --------
                                                         193,633       182,136
                                                        --------      --------
Current assets:
 Cash and temporary cash investments (notes 1 and 8)         798           778
 Accounts receivable, less allowance of
  $2,137 in 1998 and $1,739 in 1997 (notes 1 and 3)        9,938        13,120
 Unbilled revenues (note 1)                                1,610         2,658
 Deferred gas costs (notes 1,7 and 9)                          -         7,151
 Inventories, at average cost -
  Liquefied natural gas, propane and underground
   storage                                                    11        18,001
  Materials and supplies                                   1,166         1,166
 Prepaid and refundable taxes (note 2)                     4,417         3,293
 Prepayments                                               1,663           966
                                                        --------      --------
                                                          19,603        47,133
                                                        --------      --------
Deferred charges and other assets
 (notes 1, 3, 6 and 9)                                    15,378        12,874
                                                        --------      --------
 
 Total assets                                           $228,614      $242,143
                                                        ========      ========
   CAPITALIZATION AND LIABILITIES
   -------------------------------
 
Capitalization (see accompanying statement)             $164,462      $157,012
                                                        --------      --------
Current liabilities:
 Notes payable (notes 5 and 8)                             9,720        20,410
 Current portion of long-term debt (note 4)                3,050         3,707
 Accounts payable (notes 6, 7 and 8)                       7,332        16,114
 Accrued taxes                                             2,537         2,529
 Accrued vacation                                          1,597         1,658
 Customer deposits                                         2,998         3,430
 Other                                                     4,769         4,639
                                                        --------      --------
                                                          32,003        52,487
                                                        --------      --------
Deferred credits and reserves:
 Accumulated deferred Federal income taxes (note 2)       21,351        20,598
 Unamortized investment tax credits (note 2)               2,197         2,354
 Other (notes 6 and 7)                                     8,601         9,692
                                                        --------      --------
                                                          32,149        32,644
                                                        --------      --------
 
Commitments and contingencies (notes 7 and 9)                  -             -
 
 Total capitalization and liabilities                   $228,614      $242,143
                                                        ========      ========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.

                                     II-11
<PAGE>
 
                           THE PROVIDENCE GAS COMPANY
                           --------------------------
                       CONSOLIDATED STATEMENTS OF INCOME
                       ---------------------------------
                           FOR THE FISCAL YEARS ENDED
                           --------------------------
                                  SEPTEMBER 30
                                  ------------


<TABLE>
<CAPTION>
                                            1998          1997          1996
                                        ------------  ------------  ------------
                                         (Thousands, except per share amounts)
<S>                                     <C>           <C>           <C>
Operating revenues                         $184,026      $210,673      $210,601
Cost of gas sold                             91,648       117,357       118,051
                                           --------      --------      --------
  Operating margin                           92,378        93,316        92,550
                                           --------      --------      --------
 
Operating expenses:
  Operation and maintenance                  45,813        47,135        48,116
  Depreciation and amortization              13,483        12,405        11,557
  Taxes -
    State gross earnings                      5,363         6,023         6,061
    Local property and other                  7,729         7,433         6,770
    Federal income (note 2)                   4,342         4,489         4,418
                                           --------      --------      --------
 
Total operating expenses                     76,730        77,485        76,922
                                           --------      --------      --------
 
Operating income                             15,648        15,831        15,628
 
Other, net (notes 1 and 2)                      584           371           976
                                           --------      --------      --------
 
Income before interest expense               16,232        16,202        16,604
                                           --------      --------      --------
 
Interest expense:
  Long-term debt                              6,362         6,042         5,889
  Other                                       1,365         1,609         1,498
  Interest capitalized                         (254)         (220)          (93)
                                           --------      --------      --------
                                              7,473         7,431         7,294
                                           --------      --------      --------
 
Net income                                    8,759         8,771         9,310
 
Dividends on preferred stock(note 4)           (487)         (626)         (696)
                                           --------      --------      --------
 
Net income applicable to
  common stock                             $  8,272      $  8,145      $  8,614
                                           ========      ========      ========
 
Net income per common share                   $6.65         $6.55         $6.93
  (note 11)                                ========      ========      ========
 
Weighted average common
  shares outstanding (note 11)              1,243.6       1,243.6       1,243.6
                                           ========      ========      ========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.

                                     II-12
<PAGE>
 
                           THE PROVIDENCE GAS COMPANY
                           --------------------------
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                     -------------------------------------
                    FOR THE FISCAL YEARS ENDED SEPTEMBER 30
                    ---------------------------------------

<TABLE>
<CAPTION>
                                                        1998       1997      1996
                                                       ------     ------    ------
                                                         (Thousands of Dollars)
<S>                                                 <C>        <C>        <C>
Cash provided by (used for)
Operating Activities:
- --------------------
  Net income                                         $  8,759   $ 8,771   $  9,310
  Items not requiring cash:
    Depreciation and amortization                      13,611    12,533     11,686
    Charges as a result of regulatory action            1,500         -     (1,453)
    Deferred Federal income taxes                       1,063       622      1,968
    Amortization of investment tax credits               (157)     (156)      (158)
    Changes in assets and liabilities
      which provided (used) cash:
        Accounts receivable                            21,010       881       (194)
        Unbilled revenues                               1,048      (325)       304
        Deferred gas costs                                 (2)    5,977    (11,932)
        Inventories                                       (11)   (2,222)    (5,542)
        Prepaid and refundable taxes                   (1,434)     (186)     2,064
        Prepayments                                      (697)      499       (137)
        Accounts payable                               (3,282)     (366)     2,584
        Accrued taxes                                       8       662         62
        Accrued vacation, customer
          deposits and other                             (363)     (938)     1,494
        Deferred charges and other                        373     2,529      1,236
                                                     --------   -------   --------
        Net cash provided by operations                41,426    28,281     11,292
                                                     --------   -------   --------
 
Investment activities:
- -----------------------
  Expenditures for property, plant and
    equipment, net                                    (27,453)  (20,214)   (20,346)
                                                     --------  --------   --------
 
Financing activities:
- --------------------------
  Issuance of mortgage bonds                           15,000         -     15,000
  Redemption of preferred stock                        (1,600)   (1,600)         -
  Issuance of long-term debt                                -     1,345          -
  Payments on long-term debt                           (3,645)   (2,164)    (1,954)
  Premium payment on bonds                             (1,392)        -          -
  Repurchase of mortgage bonds                         (6,363)        -          -
  Increase (decrease) in notes payable, net           (10,690)     (390)     1,463
  Cash dividends on preferred shares (note 4)            (487)     (626)      (696)
  Cash dividends on common shares                      (4,776)   (4,777)    (4,627)
                                                     --------   --------   -------
    Net cash provided (used) by financing activities  (13,953)   (8,212)     9,186
                                                     --------   --------   -------
Increase (decrease) in cash and
  cash equivalents                                         20      (145)       132
Cash and cash equivalents at beginning
  of year                                                 778       923        791
                                                     --------   --------  --------
Cash and cash equivalents at end of year             $    798   $   778   $    923
                                                     ========   ========  ========
Supplemental disclosure of cash flow information:
  Cash paid during the year for -
    Interest (net of amount capitalized)             $  6,998   $ 7,305   $  6,561
    Income taxes (net of refunds)                    $  4,198   $ 2,215   $  2,367
Schedule of noncash investing activities                        
  Equipment financed through capital leases          $     -    $   437   $      -
  Equipment financed through other                              
    long-term debt                                   $     -    $ 1,983   $      -
</TABLE> 


The accompanying notes are an integral part of these consolidated
financial statements.

                                     II-13
<PAGE>
 
                           THE PROVIDENCE GAS COMPANY
                           --------------------------
                   CONSOLIDATED STATEMENTS OF CAPITALIZATION
                   -----------------------------------------
                                  SEPTEMBER 30
                                  ------------

<TABLE>
<CAPTION>
                                                       1998      1997
                                                     --------  --------
                                                        (Thousands)
<S>                                                  <C>       <C>
 
Common stock equity (notes 4 and 6):
  Common stock, $1 Par, Authorized - 2,500 shares
    Outstanding - 1,244 shares in 1998 and 1997      $  1,244  $  1,244
  Amount paid in excess of par                         37,590    37,685
  Retained earnings                                    42,807    39,311
                                                     --------  --------
                                                       81,641    78,240
                                                     --------  --------
Cumulative preferred stock (notes 4 and 8):
  Redeemable 8.7% series, $100 Par
  Authorized - 80 shares
  Outstanding - 48 shares in 1998 and
                64 shares in 1997                       4,800     6,400
                                                     --------  --------
 
Long-term debt (notes 4, 7 and 8):
  First Mortgage Bonds, secured by property -
  Series M, 10.25%, due July 31, 2008                   2,728    10,000
  Series N, 9.63%, due May 30, 2020                    10,000    10,000
  Series O, 8.46%, due September 30, 2022              12,500    12,500
  Series P, 8.09%, due September 30, 2022              12,500    12,500
  Series Q, 5.62%, due November 30, 2003                9,600    11,200
  Series R, 7.50%, due December 15, 2025               15,000    15,000
  Series S, 6.82%, due April 20, 2018                  15,000         -
Other long-term debt                                    2,573     3,207
Capital Leases                                          1,170     1,672
                                                     --------  --------
                                                       81,071    76,079
 
  Less-current portion                                  3,050     3,707
                                                     --------  --------
                                                       78,021    72,372
                                                     --------  --------
 
Total capitalization                                 $164,462  $157,012
                                                     ========  ========
</TABLE>


The accompanying notes are an integral part of these consolidated financial
statements.

                                     II-14
<PAGE>
 
                           THE PROVIDENCE GAS COMPANY
                           --------------------------
                       CONSOLIDATED STATEMENTS OF CHANGES
                       ----------------------------------
                       IN COMMON STOCKHOLDER'S INVESTMENT
                       ----------------------------------
                  FOR THE THREE YEARS ENDED SEPTEMBER 30, 1998
                  --------------------------------------------


<TABLE> 
<CAPTION> 
                                                                  
                                          Shares            Amount  
                                    Issued and Outstanding  Paid in            
                                    ----------------------  Excess     Retained
                                    Number     Amount       of Par     Earnings
                                    -------------------------------------------
                                                          (Thousands)
<S>                                 <C>       <C>           <C>       <C>    
Balance, September 30, 1995           1,244   $ 1,244       $37,820    $31,956 
Add (deduct):                                                                  
 Net income                               -         -             -      9,310 
 Cash dividends on common shares                                               
  ($3.72 per share)                       -         -             -     (4,627)
 Cash dividends on preferred                                                   
  shares ($8.70 per share)                -         -             -       (696)
 Accrual for stock                                                             
  compensation plans                      -         -          (227)         - 
 Amortization of deferred                                                      
  compensation                            -         -            64          - 
                                    -------   -------       -------    ------- 
                                                                               
Balance, September 30, 1996           1,244     1,244        37,657     35,943 
Add (deduct):                                                                  
 Net income                               -         -             -      8,771 
 Cash dividends on common shares                                               
  ($3.84 per share)                       -         -             -     (4,777)
 Cash dividends on preferred                                                   
  shares ($8.70 per share)                -         -             -       (626)
 Accrual for stock                                                             
  compensation plans                      -         -          (110)         - 
 Amortization of deferred                                                      
  compensation                            -         -           138          - 
                                    -------   -------       -------    ------- 
                                                                               
Balance, September 30, 1997           1,244     1,244        37,685     39,311 
Add (deduct):                                                                  
 Net income                               -         -             -      8,759 
 Cash dividends on common shares                                               
  ($3.84 per share)                       -         -             -     (4,776)
 Cash dividends on preferred                                                   
  shares ($8.70 per share)                -         -             -       (487)
 Accrual for stock                                                             
  compensation plans                      -         -          (266)         - 
 Amortization of deferred                                                      
  compensation                            -         -           171          - 
                                    -------   -------       -------    ------- 
Balance, September 30, 1998           1,244    $1,244       $37,590    $42,807 
                                    =======   =======       =======    =======  
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.


                                     II-15
<PAGE>
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.SIGNIFICANT ACCOUNTING POLICIES

CONSOLIDATION

     The consolidated financial statements include the accounts of The
Providence Gas Company and its wholly-owned subsidiary (the Registrant).
Revenues from the natural gas distribution business are reflected in the
accompanying Consolidated Statements of Income to arrive at operating income.
Results of nonregulated operations are presented after operating income in the
accompanying Consolidated Statements of Income. All significant intercompany
transactions have been eliminated in consolidation.

USE OF ESTIMATES IN THE PREPARATION OF FINANCIAL STATEMENTS

     The preparation of financial statements in conformity with Generally
Accepted Accounting Principles (GAAP) requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period.  Actual results could differ from those estimates.

REGULATION

     The Registrant is subject to regulation by the Rhode Island Public
Utilities Commission (RIPUC). The accounting policies of the Registrant conform
to GAAP as applied in the case of regulated public utilities and are in
accordance with the regulator's accounting requirements and rate-making
practices.

OPERATING REVENUES

     Operating revenues are generated principally from natural gas activities.
The Registrant records accrued natural gas distribution revenues based on
estimates of gas volumes delivered and not billed at the end of an accounting
period in order to match revenues with related costs.

LEASE ACCOUNTING

     Previously, the Registrant leased water heaters and other appliances to
customers under finance leases. These leases are recorded on the accompanying
Consolidated Balance Sheets at the gross investment in the leases less unearned
income. Unearned income is recognized in such a manner as to produce a constant
periodic rate of return on the net investment in the finance leases.

GAS PLANT

     Gas plant is stated at the original cost of construction.  In accordance
with the uniform system of accounts prescribed by the RIPUC, the difference
between the original cost of gas plant acquired and the cost to the Registrant
is recorded as a Plant Acquisition Adjustment and is being amortized over
periods ranging from 1 to 24 years.

     The Registrant capitalizes the costs of all technology investments with the
exception of system maintenance costs unless deferral is approved by its
regulator.

                                     II-16
<PAGE>
 
IMPAIRMENT OF LONG-LIVED ASSETS

     Statement of Financial Accounting Standards (SFAS) No. 121 "Accounting for
the Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed of"
which became effective for the Registrant in 1997, established accounting
standards for the impairment of long-lived assets. SFAS No. 121 also required
that regulatory assets which are no longer probable of recovery through future
revenues be charged to earnings. SFAS No. 121 did not have an impact on the
Registrant's financial position or results of operations.

DEPRECIATION

     Depreciation is provided on the straight-line basis at rates approved by
the RIPUC which are designed to amortize the cost of depreciable plant over its
estimated useful life. The composite depreciation rate expressed as a percentage
of the average depreciable gas plant in service was approximately 3.85 percent
for 1998, 1997 and 1996.

     The Registrant retires property units by charging original cost, cost of
removal, including environmental investigation and remediation costs and salvage
value to accumulated depreciation.

GAS CHARGE CLAUSES

     In May 1996, the RIPUC approved a Rate Design Settlement Agreement (the
Agreement). The Agreement included changes to the Registrant's gas cost recovery
mechanism. Specifically, the Agreement replaced the previous Cost of Gas
Adjustment Clause (CGA) with Gas Charge Clauses (GCC) effective June 2, 1996. In
addition to the commodity and related pipeline transportation costs historically
included in the CGA, the GCC provided for the recovery of: (1) inventory
financing costs; (2) working capital associated with gas supply purchases; (3)
bad debt expenses associated with the gas revenue portion of customer bills; and
(4) a substantial portion of liquefied natural gas operating and maintenance
expenses, all of which were previously recovered in base rates. Similar to the
former CGA, the GCC provided for reconciliation of total gas costs billed with
the actual cost of gas incurred. Any excess or deficiency in amounts billed as
compared to costs incurred was deferred and either refunded to, or recovered
from, customers over a subsequent period. As a result of the Price Stabilization
Plan Settlement Agreement described in Note 9, the GCC will be suspended for the
period from October 1, 1997 through September 30, 2000. Any excess or deficiency
in amounts billed as compared to costs incurred will be retained or borne by the
Registrant during this period.

ALLOWANCE FOR FUNDS USED DURING CONSTRUCTION

     The Registrant capitalizes interest and an allowance for equity funds in
accordance with established policies of the RIPUC. The rates used are based on
the actual cost of debt and the allowed equity return. Interest capitalized is
shown as a reduction of interest expense and the equity allowance is included in
Other, net in the accompanying Consolidated Statements of Income.

DEFERRED CHARGES AND OTHER ASSETS

     The Registrant defers and amortizes certain costs in a manner consistent
with authorized or probable rate-making treatment.

     Deferred financing costs are amortized over the life of the related
security while the remaining deferred regulatory charges and other assets are
amortized over a recovery period specified by the RIPUC.

                                     II-17
<PAGE>
 
Deferred Charges and Other Assets include the following:

<TABLE>
<CAPTION>
(thousands of dollars)                  1998     1997
- -------------------------------------  -------  -------
<S>                                    <C>      <C>
Pension costs                          $ 6,270  $ 7,272
Unamortized debt expense                 3,204    1,901
Year 2000 costs                          2,518        -
Cost of fuel assistance program            895      808
Post-retirement benefits                   346      691
Deferred rate case expense (note 9)        183      164
Goodwill, net                               95      106
Other deferred charges                   1,867    1,932
                                       -------  -------
   Total                               $15,378  $12,874
                                       =======  =======
</TABLE>

TEMPORARY CASH INVESTMENTS

    Temporary cash investments are short-term, highly liquid investments
with original maturities to the Registrant of not more than 90 days.

RECLASSIFICATIONS

    Certain prior year amounts have been reclassified for consistent
presentation with the current year.

2.FEDERAL INCOME TAXES

    The Registrant records income taxes in accordance with SFAS No. 109,
"Accounting for Income Taxes", which requires deferred taxes to be provided for
all temporary differences.

The following is a summary of the provision for Federal income taxes for the
three years ended September 30:

<TABLE>
<CAPTION>
(thousands of dollars)           1998     1997     1996
- ------------------------------  -------  -------  -------
<S>                             <C>      <C>      <C>
Current                          $3,336   $3,898   $2,821
Deferred                          1,063      622    1,968
                                 ------   ------   ------
Total Federal income tax
 provision                       $4,399   $4,520   $4,789
                                 ======   ======   ======
 
Income tax is charged to the
  following:
 
Charged to operating
  expenses                       $4,342   $4,489   $4,418
Included in other,
 net                                 57       31      371
                                 ------   ------   ------
Total Federal income tax
 provision                       $4,399   $4,520   $4,789
                                 ======   ======   ======
</TABLE>

    The effective Federal income tax rates and the reasons for their differences
from the statutory Federal income tax rates are as follows:

<TABLE>
<CAPTION>
                                   1998   1997   1996
                                  -----  -----  -----
<S>                               <C>    <C>    <C>       
Statutory Federal income tax
 rates                            34.0%  34.0%  34.0%
Reversing temporary differences    (.3)   (.2)    .3
Amortization of investment
  tax credits                      (.4)   (.4)   (.4)
Other                               .1     .6     .1
                                  -----  -----  -----
Effective Federal income tax
 rate                             33.4%  34.0%  34.0%
                                  =====  =====  =====
 </TABLE>

                                     II-18
<PAGE>
 
    The Registrant's deferred tax assets and liabilities for each of the two
years in the period ended September 30 are the result of the following temporary
differences:

<TABLE>
<CAPTION>
                                              1998         1997
                                           -----------  -----------
                                            (thousands of dollars)
Long-term deferred taxes
- ------------------------
<S>                                         <C>           <C>
  Tax assets
   Unamortized ITC                           $    774     $    828
   Other                                          424          316
 
  Tax liabilities
   Property related                           (21,801)     (20,942)
   Pension costs                                 (237)        (222)
   Deferred charges                              (511)        (578)
                                             --------     --------
 
Net deferred tax liability included in
  accompanying Consolidated Balance
  Sheets                                     $(21,351)    $(20,598)
                                             ========     ========
 
 
 
 
Prepaid taxes
- -------------
 
   Tax assets
     Accounts receivable reserves            $    921     $    424
     Property tax reserves                       (136)        (245)
     Alternative minimum tax                        -          672
     Other                                        540          787
   Tax liabilities
     Employee severance                            56           56
     Other                                       (108)        (111)
                                             --------     --------
 
   Net prepaid taxes                            1,273        1,583
 
   Prepaid gross earnings tax and other         3,144        1,710
                                             --------     --------
 
   Net prepaid and refundable taxes
     included in accompanying
     Consolidated Balance Sheets             $  4,417     $  3,293
                                             ========     ========
</TABLE>

    Investment tax credits are amortized through credits to other, net over the
estimated lives of related property.

3.  LEASE RECEIVABLES

    Previously, the Registrant financed the installation of water heaters and
other appliances for its customers under one to three-year finance agreements.
Additionally, the Registrant leased water heaters and appliances to customers
under 10-year sales-type leases.

                                     II-19
<PAGE>
 
<TABLE> 
<CAPTION> 

Future minimum lease payments to be received are:
(thousands of dollars)
- ----------------------
<S>                              <C>   
1999                             $  450
2000                                450
2001                                340
                                 ------
                                  1,240
Amount representing interest        197 
                                 ------  
Amount representing principal    $1,043
                                 ======
</TABLE> 


4.  CAPITALIZATION

A.  FIRST MORTGAGE BONDS

    In December 1995, the Registrant issued $15 million of Series R First
Mortgage Bonds.  These First Mortgage Bonds bear interest at the rate of 7.5
percent and mature in December 2025.  The net proceeds provided by this
indebtedness were used to pay down the Registrant's short-term debt.

    In April 1998, the Registrant issued $15 million of Series S First
Mortgage Bonds.  These First Mortgage Bonds bear interest at the rate of 6.82
percent and mature in April 2018.  The net proceeds provided by this
indebtedness were used to finance capital expenditures and pay down short-term
debt.

    The Registrant's First Mortgage Bonds are secured by a lien on substantially
all of the Registrant's tangible and real property.

    As of September 30, 1998, the annual sinking fund requirements and
maturities of long-term debt for each of the next five fiscal years are
$1,873,000.

    In September 1998, the Registrant repurchased $6.4 million of Series M First
Mortgage Bonds.  The cost of repurchase was comprised of $6.4 million in
principal and $1.4 million in premium.  The premium will be amortized over the
life of new debt which the Registrant expects to issue in 1999.  The
Registrant received an order from the RI Division of Public Utilities and
Carriers (Division) which permits the amortization of the bond premium over the
life of the new debt.

    The terms of the various supplemental indentures, as supplemented, under
which the First Mortgage Bonds were issued, contain restrictions which provide
that dividends may not be paid on common stock of the Registrant under certain
conditions.  Approximately $15 million of the Registrant's retained earnings
were available for dividends under the most restrictive terms of the
Registrant's First Mortgage Bond indenture.

B.  OTHER LONG-TERM DEBT

  During 1997, the Registrant financed equipment purchases of approximately
$3,328,000 through the issuance of long-term notes to IBM Credit Corporation.
The notes have five-year terms and interest rates ranging from 4.9 to 7.5
percent.  As of September 30, 1998, the maturities of these long-term notes over
the next five years are $632,000 in 1999, $670,000 in 2000, $708,000 in 2001,
$485,000 in 2002 and $74,000 in 2003.

                                     II-20
<PAGE>
 
C. REDEEMABLE PREFERRED STOCK

     The Registrant's preferred stock, which consists of 80,000 shares of $100
par value, has an 8.7 percent cumulative annual dividend rate payable on a
quarterly basis, and has no voting power or privileges. The stock is subject to
a cumulative annual sinking fund requirement of 16,000 shares per year at par
($1,600,000) plus accrued or unpaid dividends, which commenced in February 1997.
Accordingly, 16,000 shares were redeemed by the Registrant at par value in both
February 1998 and February 1997.

5. NOTES PAYABLE

     The Registrant meets seasonal cash requirements and finances capital
expenditures on an interim basis through short-term bank borrowings. As of
September 30, 1998, the Registrant had lines of credit totaling $53,000,000 with
borrowings outstanding of $9,720,000. The Registrant pays a fee for its lines of
credit rather than maintaining compensating balances. The weighted average 
short-term interest rate for borrowings outstanding at the end of the year was
5.48 percent in 1998, 5.79 percent in 1997, and 5.65 percent in 1996.

6. EMPLOYEE BENEFITS

A.   RETIREMENT PLANS

     The Registrant has two pension plans providing retirement benefits for
substantially all of its employees. The benefits under the plans are based on
years of service and the employee's final average compensation. It is the
Registrant's policy to fund at least the minimum required contribution.

The following table sets forth the funding status of the pension plans and
amounts recognized in the Registrant's Consolidated Balance Sheets at September
30, 1998 and 1997 (in thousands):

<TABLE>
<CAPTION>
                                                     1998       1997
- ------------------------------------------------------------  ---------
<S>                                               <C>         <C>
Accumulated benefit obligation, including
  vested benefit obligation of ($45,865) as of
  September 30, 1998 and $(37,961) as
  of September 30, 1997                            $(54,675)  $(44,889)
                                                   ========   ========
Projected benefit obligation for service
  rendered to date                                 $(71,194)  $(60,143)
Plan assets at fair value (primarily listed
  stocks, corporate bonds and U.S. bonds)            74,752     76,348
                                                   --------   --------
Excess of plan assets over projected
  benefit obligation                                  3,558     16,205
Unrecognized (gain)                                  (9,958)   (23,731)
Unrecognized prior service cost                       2,540      2,820
Unrecognized net transition asset
  being recognized over 15 years
  from October 1, 1985                                 (272)      (409)
                                                   --------   --------
Net accrued pension cost included in other
  deferred credits and accounts payable at
  September 30, 1998 and 1997                      $ (4,132)  $ (5,115)
                                                   ========   ========
</TABLE>

                                     II-21
<PAGE>
 
Net pension cost for fiscal years 1998, 1997 and 1996 included the following
components (in thousands):

<TABLE>
<CAPTION>
                                          1998      1997       1996
- -------------------------------------------------------------------- 
<S>                                     <C>       <C>        <C>
Service cost                            $ 1,980   $  1,818   $ 1,702
Interest cost on benefit obligations      4,881      4,569     4,246
Annual return on plan assets             (1,334)   (16,428)   (7,473)
Net amortization and deferral            (6,510)    10,506     2,085
                                        -------   --------   -------
Net periodic pension cost                  (983)       465       560
Adjustments due to regulatory
  action                                    983       (465)     (427)
                                        -------   --------   -------
Net periodic pension cost recognized
  in earnings                           $     -   $      -   $   133
                                        =======   ========   =======
</TABLE>

     In 1998, the discount rate and rate of increase in future compensation
levels used in determining the projected benefit obligation were 6.75 percent
and 5 percent, respectively. The expected long-term rate of return on assets was
9 percent in 1998.

     In 1997 and 1996, the discount rate and rate of increase in future
compensation levels used in determining the projected benefit obligation were 8
percent and 6 percent, respectively. The expected long-term rate of return on
assets was 9 percent in 1997 and 1996.

     The Registrant recovers pension costs in rates when such costs are funded.
Therefore, the amount by which funding differs from pension expense, determined
in accordance with GAAP, is deferred and recorded as a regulatory asset or
liability.

B. POST-RETIREMENT BENEFITS OTHER THAN PENSIONS

     The Registrant currently offers retirees who have attained age 55 and
worked five years for the Registrant, healthcare and life insurance benefits
during retirement (the Benefit Plan). These benefits are similar to the benefits
offered to active employees. Although retirees are not required to make
contributions to the Benefit Plan currently, future contributions may be
required if the cost of the Benefit Plan exceeds certain limits.

     Since 1993, the post-retirement benefit costs for active employees are
recorded on an accrual basis, ratably over their service periods. Benefits of
$10,526,000 earned prior to 1993 have been deferred as an unrecognized
transition obligation, which the Registrant will amortize over a 20-year period.

     The Registrant funds its post-retirement benefit obligations to a Voluntary
Employee Benefit Association (VEBA) Trust. Total contributions of $1,308,000 in
1998, $1,372,000 in 1997 and $1,454,000 in 1996 were made to the VEBA Trust.

     The Registrant recovers its post-retirement benefit obligation in rates to
the extent allowed by the RIPUC. The RIPUC generally allows such costs to be
recovered if amounts are funded into tax favored investment funds, such as the
VEBA Trust. Accordingly, the Registrant fully recovered its 1998, 1997 and 1996
post-retirement benefit obligations because such obligations were funded into
the VEBA Trust. In addition, in September 1996, the RIPUC approved a ratable
recovery of the cumulative unrecovered difference of $1,041,000 during 1997,
1998 and 1999. Of the total post-retirement benefit obligations, $1,654,000,
$1,718,000, and $1,454,000 were included in rates during 1998, 1997 and 1996,
respectively.

                                     II-22
<PAGE>
 
     The Benefit Plan's costs and accumulated post-retirement benefit obligation
for 1998, 1997 and 1996 are calculated by the Registrant's actuaries using
assumptions and estimates which include:

<TABLE>
<CAPTION>
                                                   1998   1997  1996 
                                                  ------  ----  ---- 
<S>                                               <C>     <C>   <C>  
                                                                     
Healthcare cost annual growth rate                  9.0%  10.2% 11.4%
Healthcare cost annual growth rate - long-term      6.0    6.0   6.0 
Expected long-term rate of return (union)           8.5    8.5   8.5 
Expected long-term rate of return (non-union)       5.5    5.5   5.5 
Discount rate                                      6.75    8.0   8.0  
</TABLE>

     The healthcare cost annual growth rate significantly impacts the estimated
Benefit Plan obligation and annual expense. For example, in 1998, a one percent
change in the above rates would change the obligation by $773,000 and would
change the annual expense by $86,000.

     The obligations and assets of the Benefit Plan at September 30, 1998 and
1997 are (in thousands):

<TABLE> 
<CAPTION> 
                                          1998           1997     
- ---------------------------------------------------------------       
<S>                                    <C>           <C>  
Accumulated post-retirement                                           
  benefit obligation:                                                 
  Current retirees                     $ (6,444)     $  (6,626)       
  Active employees-eligible for                                       
    benefits                             (1,469)        (1,361)       
  Active employees                       (4,973)        (3,761)       
                                       --------      ---------        
  Total post-retirement benefit                                       
   obligation                           (12,886)       (11,748)       
                                                                      
  Plan assets at fair value               5,684          4,704        
                                       --------      ---------        
  Unfunded post-retirement benefit                                    
   obligation                            (7,202)        (7,044)       
  Unrecognized transition                                             
    obligation                            7,895          8,421        
  Unrecognized net (gain) or loss          (693)        (1,360)       
                                       --------      ---------        
                                                                      
  Prepaid accrued post-retirement                                     
   benefit obligations included                                       
   in the Registrant's Consolidated                         
   Balance Sheets                      $      -      $      17        
                                       ========      =========        
</TABLE> 

                                       
     The Registrant's actuarially determined Benefit Plan costs for 1998, 
1997 and 1996 include the following:

<TABLE> 
<CAPTION> 
                                       1998       1997       1996           
                                     --------   --------   ---------        
<S>                                  <C>        <C>        <C>              
Service cost                         $    243   $    228    $    222        
Interest cost                             945        896         896        
Actual return on plan assets             (406)      (278)        (98)       
Amortization and deferral                 526        526         434        
                                     --------   --------   ---------        
                                                                            
Total annual plan costs              $  1,308   $  1,372    $  1,454        
                                     ========   ========   =========        
</TABLE>

C.  SUPPLEMENTAL RETIREMENT PLANS

     The Registrant provides certain supplemental retirement plans for key
employees. The projected benefit obligation is approximately $1,837,000 which is
being accrued over the service period of these key employees. The supplemental
retirement plans are unfunded. The Registrant accrued and expensed $61,000,
$612,000 and $310,000 related to these benefits in 1998, 1997 and 1996,
respectively.

                                     II-23
<PAGE>
 
D.  PERFORMANCE AND EQUITY INCENTIVE PLAN

     During 1992, the Board of Directors of Providence Energy, with subsequent
approval of Providence Energy's common shareholders, adopted the Providence
Energy Corporation Performance and Equity Incentive Plan (the Plan). The Plan
provides that up to 225,000 shares of common stock may be granted to key
employees including employees of the Registrant, at no cost to the employees.
Key employees who received common shares, are entitled to receive dividends, but
assumption of full beneficial ownership vests on the fifth anniversary of the
grant date provided the participant is still employed by Providence Energy or
one of its subsidiaries. Vesting may be accelerated under certain circumstances.
The Plan also provides for cash compensation to key employees.

     The executive compensation incentive awards paid by the Registrant under
this Plan totaled approximately $459,000 for 1998, $439,000 for 1997 and
$381,000 for 1996. Amounts paid in cash are charged to expense when earned.
However, amounts paid in restricted stock are deferred and amortized to expense
over the five-year vesting period.

     Of the $459,000 1998 award, $310,000 will be paid in cash during fiscal
1999. Of the $439,000 1997 award, $297,000 was paid in cash during 1998. Of the
$381,000 1996 award, $269,000 was paid in cash during 1997. Grant shares
totaling 7,230, 5,989, and 4,491 were purchased by the Registrant and reissued
to key employees during 1998, 1997, and 1996, respectively.

E.  RESTRICTED STOCK INCENTIVE PLAN

     The Restricted Stock Incentive Plan provides that up to 60,000 shares of
Providence Energy common stock may be granted to employees of the Registrant
with at least three months of service, who are not officers or covered by a
collective bargaining agreement, at no cost to the employee. All participants
are entitled to receive dividends; however, full beneficial ownership vests on
the third anniversary of the date of the grant provided that the participant is
still employed by the Registrant. Vesting may be accelerated under certain
circumstances.

     Awards under the Restricted Stock Incentive Plan totaled approximately
$90,000 in 1998 consisting of 4,230 shares and approximately $146,000 in 1996
consisting of 7,954 shares. There were no awards under the Restricted Stock
Incentive Plan in 1997. All amounts awarded under the Restricted Stock Incentive
Plan are deferred and amortized to expense over a three-year period.

F.  1998 PERFORMANCE SHARE PLAN

     Effective October 1, 1998, the Board of Directors adopted a Performance
Share Plan to encourage executives' interest in longer-term performance by
keying incentive payouts to the total return performance of Providence Energy
Corporation's (Providence Energy) common stock in relation to that of other
companies in the E.D. Jones gas distribution group of approximately 30 companies
and to the change in Providence Energy's Stock price over three-year performance
periods. The number of shares earned will range from 50 percent to 150 percent
of awarded shares, if based on the relative total shareholder return method, and
50 percent to 100 percent, if based on the increase in the stock price of
Providence Energy's common stock during the three-year period. These levels were
developed to bring total compensation levels for the Registrant and its parent
company, Providence Energy Corporation, more in line with survey data for the
relevant labor market. No shares will be earned unless Providence Energy
shareholders have earned a minimum annual return over the three-year period


                                     II-24
<PAGE>

equal to the total annual return for thirty-year Treasury notes during such
period. Dividends will not be paid on the shares until they are earned. Awards
will be paid half in cash and half in Providence Energy common stock.

7. COMMITMENTS AND CONTINGENCIES

A.  LEGAL PROCEEDINGS

     The Registrant is involved in legal and administrative proceedings in the
normal course of business, including certain proceedings involving material
amounts in which claims have been or may be made. However, management believes,
after review of insurance coverage and consultation with legal counsel, that the
ultimate resolution of the legal proceedings to which it is or can at the
present time be reasonably expected to be a party, will not have a materially
adverse effect on the Registrant's results of operations or financial condition.

B.  LEASES

     The Registrant has a capital lease with Algonquin Gas Transmission Company
(Algonquin) for storage space in a liquefied natural gas (LNG) tank. The capital
lease arrangement also provides that Algonquin lease from the Registrant, for a
corresponding term at an annual amount of $150,000, the land on which the tank
is situated. The Registrant also leases certain information systems and other
equipment under capital leases.

Property under Capital Leases:
- ------------------------------

<TABLE>
<CAPTION>
 
(thousands of dollars)                 1998        1997
- --------------------------------------------------------
<S>                                 <C>         <C>      
Gas plant                           $ 6,116     $ 6,116
Information systems                   1,988       1,988
Accumulated depreciation             (6,937)     (6,484)
                                    -------     -------
                                    $ 1,167     $ 1,620
                                    =======     =======
</TABLE> 
 
Commitments for Capital Leases:
- -------------------------------
 
<TABLE> 
<CAPTION> 
                                    LNG       Computer
(thousands of dollars)              Storage   Equipment   Total
- ----------------------------------------------------------------
<S>                                 <C>       <C>         <C>      
1999                                $   136     $   484   $  620
2000                                    136         297      433
2001                                    135         111      246
2002                                      -          35       35
                                    -------     -------   ------
                                    $   407     $   927   $1,334
                                    =======     =======   ======
</TABLE> 

C.  OPERATING LEASES

     The Registrant also leases facilities and equipment under operating leases
with a total future obligation of approximately $578,000 as of September 30,
1998.

D.  GAS SUPPLY

     As part of the Price Stabilization Plan Settlement Agreement described in
Note 9, the Registrant entered into a full requirements gas supply contract with
Duke Energy Trading and Marketing, L.L.C. (DETM) for a term of three years.
Under the contract, DETM guarantees to meet the Registrant's supply
requirements; however, the Registrant must purchase all of its gas supply
exclusively from DETM. Under the contract, the Registrant transferred
responsibility for its pipeline capacity resources, storage contracts and LNG
capacity to DETM. As a result, the Registrant's gas inventories of approximately
$18 million at September 30, 1997 were sold at book value to DETM on October 1,
1997.

                                     II-25
<PAGE>
 
     As a result of Federal Energy Regulatory Commission (FERC) Order 636 and
other related orders (the Orders), pipeline transportation companies have
incurred significant costs, collectively known as transition costs. The majority
of these costs will be reimbursed by the pipeline's customers, including the
Registrant. The Registrant estimates its transition costs to be approximately
$21.7 million, of which $16.2 million has been included in the GCC and collected
from customers through September 30, 1997. At September 30, 1997, the remaining
minimum obligation of $5.5 million has been recorded in the accompanying
Consolidated Balance Sheets along with a regulatory asset anticipating future
recovery. As part of the above supply contract, DETM assumed liability for these
transition costs during the contract's three-year term. At the end of the three-
year term of the contract, the Registrant will assume any remaining liability,
which is not expected to be material.

E. ENVIRONMENTAL MATTERS

     Federal, state and local laws and regulations establishing standards and
requirements for the protection of the environment have increased in number and
in scope within recent years. The Registrant cannot predict the future impact of
such standards and requirements, which are subject to change and can take effect
retroactively. The Registrant continues to monitor the status of these laws and
regulations. Such monitoring involves the review of past activities and current
operations, and may include expending funds to investigate or clean up certain
sites. To the best of its knowledge, subject to the following, the Registrant
believes it is in substantial compliance with such laws and regulations.

     At September 30, 1998, the Registrant was aware of five sites at which
future costs may be incurred.

     The Registrant has been designated as a potentially responsible party (PRP)
under the Comprehensive Environmental Response Compensation and Liability Act of
1980 at two sites in Plympton, Massachusetts on which waste material is alleged
to have been deposited by disposal contractors employed in the past either
directly or indirectly by the Registrant and other PRPs. With respect to one of
the Plympton sites, the Registrant has joined with other PRPs in entering into
an Administrative Consent Order with the Massachusetts Department of
Environmental Protection. The costs to be borne by the Registrant, in connection
with both Plympton sites, are not anticipated to be material to the financial
condition of the Registrant.

     During 1995, the Registrant began a study at its primary gas distribution
facility located in Providence, Rhode Island. This site formerly contained a
manufactured gas plant operated by the Registrant. As of September 30, 1998,
approximately $2.0 had been spent primarily on studies at this site. In
accordance with state laws, such a study is monitored by the Rhode Island
Department of Environmental Management (DEM). The purpose of this study was to
determine the extent of environmental contamination at the site. The Registrant
has completed the study which indicated that remediation will be required for
two-thirds of the property. The remediation is expected to begin in February
1999 and will continue for a duration of three to six months. During the
remediation process, the remaining one-third of the property will also be
investigated and remediated, if necessary.

                                     II-26
<PAGE>
 
     At September 30, 1998, the Registrant compiled a preliminary range of
costs, based on removal and off-site disposal or recycling of contaminated soil,
ranging from $1.8 million to in excess of $5.0 million. However, because of the
uncertainties associated with environmental assessment and remediation
activities, the future cost of remediation could be higher than the range noted.
Based on the proposals for remediation work, the Registrant has accrued $1.8
million at September 30, 1998, for anticipated future remediation costs at this
site.

     Tests conducted following the discovery of an abandoned underground oil
storage tank at the Registrant's Westerly, Rhode Island operations center in
1996 confirmed the existence of contaminants at this site. The Registrant is
currently conducting tests at this site, the costs of which are being shared
equally with the prior owner, to determine the nature and extent of the
contamination. Due to the early stages of investigation, management cannot offer
any conclusions as to whether any remediation will be required at this site. In
addition, in 1997, contamination from scrapped meters and regulators was
discovered at this site. The Registrant has reported this to DEM and the Rhode
Island Department of Health and is in the process of remediation. It is
anticipated that remediation will cost approximately $10,000. Accordingly, the
Registrant has accrued $10,000 at September 30, 1998 for anticipated future
remediation costs.

     In November 1998 the Registrant received a letter of responsibility from
DEM relating to possible contamination on previously-owned property on Allens
Avenue in Providence. The current owner of the property has been similarly
notified. The Registrant lacks sufficient information at this time to determine
the validity of the claim, the amount of the clean-up costs or any defenses
which may be available with respect to such claim.

     In prior rate cases filed with the RIPUC, the Registrant requested that
environmental investigation and remediation costs be recovered by inclusion in
its depreciation factors consistent with the rate recovery treatment for all
types of cost of removal. Due to the magnitude of the Registrant's environmental
investigation and remediation expenditures, the Registrant sought current
recovery for these amounts. As a result, in accordance with the Price
Stabilization Plan Settlement Agreement described in Note 9, effective October
1, 1997, all environmental investigation and remediation costs incurred through
September 30, 1997, as well as all costs incurred during the three-year term of
the Plan, will be amortized over a ten-year period. Additionally, it is the
Registrant's practice to consult with the RIPUC on a periodic basis when, in
management's opinion, significant amounts might be expended for environmental-
related costs. As of September 30, 1998, the Registrant has charged
environmental assessment and remediation costs of $2.6 million and an estimated
$1.8 million to the accumulated depreciation reserve and has amortized $.4
million of these costs.

     Management has begun discussions with other parties who may assist the
Registrant in paying any future costs at the above sites. Management believes
that its program for managing environmental issues, combined with rate recovery
and financial contributions from others, will likely avoid any material adverse
effect on its results of operations or its financial condition as a result of
the ultimate resolution of the above sites.

                                     II-27
<PAGE>
 
8.  FAIR VALUE OF FINANCIAL INSTRUMENTS

The following methods and assumptions were used to estimate the fair value
disclosures for the following financial instruments:

Cash, Cash Equivalents, Accounts Payable and Short-term Debt
- ------------------------------------------------------------

The carrying amount approximates fair value due to the short-term maturity of
these instruments.

Long-Term Debt and Preferred Stock
- ----------------------------------

The fair value of long-term debt and preferred stock is estimated based on
currently quoted market prices for similar types of issues.

The carrying amounts and estimated fair values of the Registrant's financial
instruments at September 30 are as follows:

<TABLE>
<CAPTION>
                                    1998               1997
                                    ----               ----  
 
                             Carrying   Fair    Carrying   Fair
(in thousands)                Amount    Value    Amount    Value
- ----------------------------------------------  -----------------
<S>                          <C>       <C>      <C>       <C> 
Cash and cash equivalents     $   798  $   798   $   778  $   778
Accounts payable                7,332    7,332    16,114   16,114
Short-term debt                 9,720    9,720    20,410   20,410
Long-term debt                 81,071   93,707    76,079   84,039
Preferred stock                 4,800    5,040     6,400    7,030
</TABLE>

     The difference between the carrying amount and the fair value of the
Registrant's preferred stock and long-term debt, if they were settled at amounts
reflected above, would likely be recovered in the Registrant's rates over a
prescribed amortization period. Accordingly, any settlement should not result in
a material impact on the Registrant's financial position or results of
operations.

9.  RATE CHANGES

     In August 1997, the RIPUC approved the Price Stabilization Plan Settlement
Agreement (Energize RI or the Plan) among the Registrant, the Division, the
Energy Council of Rhode Island and the George Wiley Center. Effective for the
period from October 1, 1997 to September 30, 2000, Energize RI provides
customers with a price decrease of approximately four percent in addition to a
three-year price freeze. Under Energize RI, the GCC will be suspended for the
entire term. Energize RI also requires the Registrant to make significant
capital investments to improve its distribution system. Capital investments
required by Energize RI are estimated to total approximately $26 million over
the three-year term. In addition, Energize RI requires the Registrant to fund
the Low-Income Assistance Program at an annual level of $1 million, the Demand
Side Management Rebate Program at an annual level of $.5 million and the Low-
Income Weatherization Program at an annual level of $.2 million. Energize RI
also continues the process of unbundling by requiring the Registrant to provide
unbundled service offerings up to 10 percent per year of firm deliveries.

     As part of Energize RI, the Registrant will amortize approximately $4
million of environmental costs previously charged to the accumulated
depreciation reserve. These costs and all environmental costs incurred during
the term of the Plan will be amortized over a 10-year period. Also, in
connection with the Plan, the Registrant wrote-off approximately $1.5 million of
previously deferred gas costs in October 1997.

                                     II-28
<PAGE>
 
     Under Energize RI, the Registrant may earn up to 10.9 percent annually on
its average common equity of up to $81.0 million, $86.2 million, and $92.0
million in fiscal 1998, 1999, and 2000, respectively. In addition, the
Registrant may not earn less than a seven percent return on average common
equity. In the event that the Registrant earns in excess of 10.9 percent or less
than seven percent, the Registrant will defer revenues or costs through a
deferred revenue account over the term of the Plan. Any balance in the deferred
revenue account at the end of the Plan, will be refunded to or recovered from
customers in a manner to be determined by all parties to the Plan and approved
by the RIPUC.

     As part of Energize RI, the Registrant is permitted to file with the
Division for the recovery of the impact of exogenous Changes (Changes), which
may occur during the three-year term of the Plan. Changes are defined as
"...significant increases or decreases in the Registrant's costs or revenues
which are beyond the Registrant's reasonable control." Any disputes regarding
either the nature or quantification of the Changes are to be resolved by the
RIPUC. The impact of any such Changes will be debited or credited to a
regulatory asset or liability account throughout the term of Energize RI and
will be recovered or refunded at the expiration of the Plan through a method to
be determined.

     During 1998, due to the extremely warm temperatures, the Registrant
experienced a margin loss of approximately $4.0 million. The Registrant also
experienced a non-firm margin loss of approximately $2.2 million due to adverse
market prices of natural gas versus alternate fuels. The Registrant believes the
causes of these two events were beyond its control and thus considers them as
Changes. In fiscal 1999, the Registrant intends to file with the Division for
recovery of a portion of these losses.

     In 1998, the Registrant did not earn its allowed rate of return primarily
as a result of the extremely warm weather and the loss of non-firm margin as
previously discussed in "Operating Margin" in the Management's Discussion and
Analysis of Financial Condition and Results of Operations. Under the Plan's
design, which assumed normal weather, the Registrant should have had earnings in
year one of the Plan in excess of 10.9 percent. The earnings in excess of 10.9
percent were to be deferred in the deferred revenue account to fund capital
investments and other Plan commitments in the remaining two years of the Plan.
Absent favorable recovery for the Changes as discussed above, and/or other
factors such as colder than normal weather, the Registrant's ability to earn a
10.9 percent return on average common equity in future Plan years is
substantially impaired.

10.  NEW ACCOUNTING PRONOUNCEMENTS

     In October 1997, the Registrant adopted the provisions of Statement of
Financial Accounting Standards (SFAS) No. 128, "Earnings per Share", which is
effective for financial statements issued for periods ending after December 15,
1997. SFAS No. 128 replaces the presentation of primary earnings per share with
the presentation of basic earnings per share on the face of the income
statement. Basic earnings per share excludes dilution and is calculated by
dividing income available to common stockholders by the weighted average number
of common shares outstanding for the period. Basic earnings per share and
diluted earnings per share are the same for all periods presented. Earnings per
share for the prior periods presented have been unchanged when calculated under
SFAS No. 128.

                                     II-29
<PAGE>
 
     Effective October 1, 1997, the Registrant adopted the provisions of
Statement of Position (SOP) 96-1, "Environmental Remediation Liabilities". This
Statement provides authoritative guidance for recognition, measurement, display
and disclosure of environmental remediation liabilities in financial statements.
The Registrant has recorded environmental remediation liabilities of
approximately $1.8 million at September 30, 1998. SOP 96-1 did not have an
impact on the Registrant's financial position or results of operations upon
adoption. Also see Note 7E "Environmental Matters".

     In June 1997, the Financial Accounting Standards Board (FASB) issued SFAS
No. 130, "Reporting Comprehensive Income" and SFAS No. 131, "Disclosures about
Segments of an Enterprise and Related Information". SFAS No. 130, which is
effective for the Registrant's fiscal year ending September 30, 1999, requires
that an enterprise (a) classify items of other comprehensive income by their
nature in a financial statement and (b) display the accumulated balance of other
comprehensive income separately from retained earnings and additional paid-in
capital in the equity section of a statement of financial position. SFAS No.
131, which is effective for the Registrant's fiscal year ending September 30,
1999, requires that a public business enterprise report financial and
descriptive information about its reportable operating segments. These
statements require additional disclosure only and will not affect the financial
position or results of operations of the Registrant.

     In June 1998, the FASB issued SFAS No. 133, "Accounting for Derivative
Instruments and Hedging Activities". This Statement establishes accounting and
reporting standards requiring that every derivative instrument (including
certain derivative instruments embedded in other contracts) be recorded on the
balance sheet as either an asset or liability measured at its fair value. SFAS
No. 133 requires that changes in the derivative's fair value be recognized
currently in earnings unless specific hedge accounting criteria are met. Special
accounting for qualifying hedges allows a derivative's gains and losses to
offset related results on the hedged item in the income statement, and requires
that a company must formally document, designate and assess the effectiveness of
transactions that receive hedge accounting.

     SFAS No. 133 is effective for the Registrant's fiscal year ending September
30, 2000. A company may also implement the Statement as of the beginning of any
fiscal quarter after issuance (that is, fiscal quarters beginning June 16, 1998
and thereafter). SFAS No. 133 cannot be applied retroactively. SFAS No. 133 must
be applied to (a) derivative instruments and (b) certain derivative instruments
embedded in hybrid contracts that were issued, acquired or substantively
modified after December 31, 1997 (and, at a company's election, before January
1, 1998).

     The Registrant has not yet quantified the impact of adopting SFAS No. 133
on the consolidated financial statements and has not determined the timing of or
method of adoption of SFAS No. 133.

     In March 1998, the American Institute of Certified Public Accountants
issued SOP 98-1, "Accounting for the Costs of Computer Software Developed or
Obtained for Internal Use". It applies to all nongovernmental entities and is
effective for the Registrant's financial statements for the fiscal year ending
September 30, 2000. The provisions of this SOP should be applied to internal-use
software costs incurred in fiscal years subsequent to December 15, 1998 for all
projects, including those projects in progress upon initial application of the
SOP.

                                     II-30
                                        
<PAGE>
 
     The SOP establishes accounting standards for the determination of capital
or expense treatment of expenditures for computer software developed or obtained
for internal use based upon the stage of development. The SOP defines the three
stages as (1) Preliminary Project, (2) Application Development and (3) Post-
Implementation/Operation. As a general rule, the Preliminary Project and Post-
Implementation/Operation phase expenditures are expensed and Application
Development expenditures are capitalized.

     The Registrant will adopt the SOP upon the effective date and assess its
impact at that time.

11.  UNAUDITED QUARTERLY FINANCIAL INFORMATION

     The following is unaudited quarterly financial information for the two
years ended September 30, 1998. Quarterly variations between periods are caused
primarily by the seasonal nature of gas sales and the availability of gas.

(thousands, except per share amounts)

<TABLE> 
<CAPTION> 
                                           Quarter Ended
                               -------------------------------------
                               Dec. 31  Mar. 31  June 30   Sept. 30
                               -------------------------------------
<S>                            <C>      <C>      <C>       <C>
Fiscal 1998
- --------------------------------------------------------------------
Operating revenues             $59,200  $73,686  $31,155    $19,985
Operating income (loss)          6,214   11,564      644     (2,774)
Net income (loss)
 applicable to
 common stock                    4,298    9,695   (1,106)    (4,615)
Net income (loss) per
  share applicable to
  common stock *                  3.46     7.79     (.89)     (3.71)
 
Fiscal 1997
- --------------------------------------------------------------------
Operating revenues             $61,673  $76,590  $40,679    $31,731
Operating income (loss)          6,216    8,568    2,148     (1,101)
Net income (loss)
  applicable to common
  stock                          4,284    6,640      329     (3,108)
Net income (loss) per share
  applicable to
  common stock*                   3.44     5.34      .26      (2.49)
</TABLE>

* Calculated on the basis of weighted average shares outstanding during the
quarter.

                                     II-31
<PAGE>
 
REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To The Board of Directors of The Providence Gas Company:

     We have audited the accompanying consolidated balance sheets and the
consolidated statements of capitalization of The Providence Gas Company (a Rhode
Island corporation and a wholly-owned subsidiary of Providence Energy
Corporation) as of September 30, 1998 and 1997, and the related consolidated
statements of income, changes in common stockholder's investment and cash flows
for each of the three years in the period ended September 30, 1998. These
financial statements and the schedule referred to below are the responsibility
of the Company's management. Our responsibility is to express an opinion on
these financial statements and the schedule based on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of The
Providence Gas Company as of September 30, 1998 and 1997, and the results of its
operations and its cash flows for each of the three years in the period ended
September 30, 1998, in conformity with generally accepted accounting principles.

     Our audits were made for the purpose of forming an opinion on the basic
financial statements taken as a whole. The schedule listed in the accompanying
index to the financial statements is presented for purposes of complying with
the Securities and Exchange Commission's rules and is not part of the basic
financial statements. This schedule has been subjected to the auditing
procedures applied in the audits of the basic financial statements and, in our
opinion, fairly states, in all material respects, the financial data required to
be set forth therein, in relation to the basic financial statements taken as a
whole.

Arthur Andersen LLP



/s/ Arthur Andersen LLP
- -----------------------
Boston, Massachusetts
November 6, 1998

                                     II-32
<PAGE>
 
   ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
   ------------------------------------------------------------------------
            FINANCIAL DISCLOSURE
            --------------------

Not applicable.



                                     II-33
<PAGE>
 
                                   PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
- ------------------------------------------------------------
    The following information is furnished with respect to the executive
officers of the Registrant:

<TABLE>
<CAPTION>
                                                                           Year Office
Name and Age                         Office                                 First Held
- ------------                         ------                                -----------          
<S>                              <C>                                       <C>        
James H. Dodge          (58)     Chairman, President, and Chief
                                 Executive Officer                              1992      
                                                                                          
James DeMetro           (50)     Senior Vice President, Energy                            
                                 Services                                       1996      
                                                                                          
Gary S. Gillheeney      (43)     Senior Vice President, Chief                             
                                 Financial Officer, and                                   
                                 Treasurer                                      1996      
                                                                                          
Robert W. Owens         (50)     Senior Vice President, Gas                               
                                 Distribution                                   1996      
                                                                                          
Peter J. Gill           (39)     Vice President, Information                              
                                 Technology                                     1998 **   
                                                                                          
Alycia L. Goody         (46)     Vice President, General Counsel,                         
                                 and Secretary                                  1994      
                                                                                          
James A. Grasso         (44)     Vice President, Public and Government                    
                                 Affairs, and Assistant Secretary               1998 **   
                                                                                          
Timothy S. Lyons        (37)     Vice President,Marketing and                             
                                 Regulatory Affairs                             1998      
                                                                                          
William D. Mullin       (50)     Vice President, Economic                                 
                                 Development and Operations                     1996 *    
                                                                                          
Bruce G. Wilde          (52)     Vice President, Administration                           
                                 and Assistant Secretary                        1996 *    
                                                                                          
Gary L. Beland          (48)     Assistant Vice President,                      1996      
                                 Gas Supply                                               
                                                                                          
Sharon A. Dufour        (33)     Controller                                     1998 **   
</TABLE>

     Mr. Dodge was elected President and Chief Executive Officer in August 1990
after the retirement of Louis R. Hampton.  Mr. Dodge subsequently became
Chairman of the Board in January 1992.  Mr Dodge currently serves as a member of
the Board of Capital Properties, Inc., a non-affiliated real estate leasing
company.

     Mr. DeMetro was elected Senior Vice President, Energy Services in February
1996. For four years prior thereto, Mr. DeMetro served the Registrant as Vice
President, Energy Services.

     Mr. Gillheeney was elected Senior Vice President and Chief Financial
Officer in February 1996 and Treasurer in January 1994. For more than two years
prior to February 1996, Mr. Gillheeney served the Registrant as Vice President,
Financial and Information Services, as well as Treasurer. For more than five
years prior thereto, Mr. Gillheeney served the Registrant in various management
positions, with his last position as Assistant Treasurer and Controller.

                                     III-1
<PAGE>
 
     Mr. Owens was elected Senior Vice President, Gas Distribution in February
1996.  For more than two years prior thereto, Mr. Owens served the Registrant as
Vice President, Operations. For more than five years prior thereto, Mr. Owens
served the Registrant in various management positions, with his last position as
Vice President, Treasurer and Chief Financial Officer.

     Mr. Gill was elected Vice President, Information Technology in September
1998, effective October 1, 1998.  For more than two years prior thereto, Mr.
Gill served as Controller and Assistant Treasurer.  For two years prior thereto,
Mr. Gill served the Registrant as Director of Planning.  For four years prior
thereto, Mr. Gill served the Registrant as Director of Budgeting.

     Ms. Goody was elected Vice President, General Counsel and Secretary in
December 1994.  For two years prior thereto, Ms. Goody served the Registrant as
General Counsel and Corporate Secretary.

     Mr. Grasso was elected Vice President, Public and Government Affairs and
Assistant Secretary in September 1998, effective October 1, 1998. For one year
prior thereto, Mr. Grasso served as Vice President, Public and Government
Affairs.  For three years prior thereto, Mr. Grasso served as Director of Public
and Government Relations of PanEnergy Corporation and Algonquin Gas Transmission
Company.  For ten years prior thereto, Mr. Grasso served as Manager of Land,
Public and Government Relations of Algonquin Gas Transmission Company.

     Mr. Lyons was elected Vice President, Marketing and Regulatory Affairs in
April 1998.  For more than two years prior thereto, Mr. Lyons served as
Assistant Vice President, Pricing and Regulation.  For two years prior thereto,
Mr. Lyons served the Registrant as Director of Pricing.  For two years prior
thereto, Mr. Lyons served the Registrant as Director of Rates.

     Mr. Mullin was elected Vice President, Economic Development and Operations
in February 1996.  For more than two years prior thereto, Mr. Mullin served the
Registrant as Vice President, Corporate Relations.  For five years prior
thereto, he served the Registrant in various management positions, with his last
position as Vice President, Operations.

     Mr. Wilde was elected Vice President, Administration in February 1996 and
Assistant Secretary in May 1994.  For more than a year prior to his election as
Vice President, Administration, Mr. Wilde served the Registrant as Vice
President, Human Resources.  For more than five years prior thereto, Mr. Wilde
served the Registrant in various management positions, with his last position as
Assistant Vice President for Personnel.

     Mr. Beland was elected Assistant Vice President, Gas Supply in February
1996.  For two years prior thereto, Mr. Beland served as Director of Gas and
Transportation Services.  For more than five years prior thereto, Mr. Beland
served the Niagara Mohawk Power Corp., a regulated natural gas utility, in
various management positions, with his last position as Manager, Gas Supply
Planning.

     Ms. Dufour was elected Controller in September 1998, effective October 1,
1998.  For two years prior thereto, Ms. Dufour served as Director of Financial
Information and Budgeting Services.  For two years prior thereto, Ms. Dufour
served as Director of Financial Information.

* Subsequent to September 30, 1998, William D. Mullin and Bruce G. Wilde
resigned from the Registrant.

** Effective October 1, 1998.

                              III-2
<PAGE>
 
DIRECTORS OF THE REGISTRANT
- ---------------------------

     For information called for by this item, reference is made to pages 2
through 6 of Providence Energy Corporation's proxy statement filed December
16, 1998 with the Securities and Exchange Commission for the annual meeting of
shareholders to be held January 14, 1999.

                                     III-3
<PAGE>
 
ITEM 11.  EXECUTIVE COMPENSATION
- --------------------------------

For the information called for by this item, reference is made to pages 7 to 14
of Providence Energy Corporation's proxy statement filed December 16, 1998 with
the Securities and Exchange Commission for the annual meeting of shareholders to
be held January 14, 1999.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
- ------------------------------------------------------------------------

Not applicable.  All of the Registrant's voting securities are held by
Providence Energy Corporation.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
- --------------------------------------------------------

For information called for by this item, reference is made to page 6 of
Providence Energy Corporation's proxy statement filed December 16, 1998 with the
Securities and Exchange Commission for the annual meeting of shareholders to be
held January 14, 1999.

                                     III-4
<PAGE>
 
                                    PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K
- -------------------------------------------------------------------------

                          THE PROVIDENCE GAS COMPANY

           INDEX TO CONSOLIDATED FINANCIAL STATEMENTS AND SCHEDULES

(a)  Financial Statements and Schedules
     ----------------------------------

Consolidated Balance Sheets--September 30, 1998 and 1997
Consolidated Statements of Income for the years ended September 30, 1998, 1997
and 1996
Consolidated Statements of Cash Flows for the years ended September 30, 1998,
1997 and 1996
Consolidated Statements of Capitalization--September 30, 1998 and 1997
Consolidated Statements of Changes in Common Stockholder's Investment for the
years ended September 30, 1998, 1997 and 1996
Notes to Consolidated Financial Statements
Report of Independent Public Accountants

Schedule II.  Reserves for the years ended September 30, 1998, 1997 and 1996.

   Schedules I to XIII not listed above are omitted as not applicable
or not required under Regulation S-X.

(b)  Reports on Form 8-K
     -------------------

     No reports were filed on Form 8-K during the latest quarter of the
Registrant's fiscal year ended September 30, 1998.

(c)  Exhibits
     --------

 The following exhibits are filed as part of this report:

3.1   Charter (incorporated by reference to Exhibit 3.1 to the Registrant's
      Registration Statement on Form S-1 (Registration No.2-72726)).

3.2   Bylaws. (Filed as Exhibit 3.2 to the Report on Form 10-K of the Registrant
      in Form 10-K for the year ended September 30, 1993, incorporated herein by
      this reference.)

4.1   First Mortgage Indenture dated as of January 1, 1922, as supplemented by
      First through Twelfth Supplemental Indentures, (incorporated by reference
      to Exhibit 10.10 to the Registrant's Registration Statement on Form S-1
      (Registration No. 2-72726)).

4.2   Fourteenth, Fifteenth and Sixteenth Supplemental Indentures dated as of
      August 1, 1988, June 1, 1990 and November 1, 1992, respectively
      (incorporated by reference to Exhibit 4 to the report of Providence Energy
      Corporation (Commission File No. 1-10032) to the Securities and Exchange
      Commission on Form 10-Q for the quarter ended March 31, 1993).

4.3   Seventeenth Supplemental Indenture dated as of November 1, 1993.(Filed as
      Exhibit 4.5 to the report of the Registrant in Form 10-K for the year
      ended September 30, 1993, incorporated herein by this reference.)

                                     IV-1
<PAGE>
 
4.4   Eighteenth Supplemental Indenture dated as of December 1, 1995. (Filed as
      exhibit 4.6 to the report of the Registrant in Form 10-K for the year
      ended September 30, 1995, incorporated herein by this reference.)

4.5   Nineteenth Supplemental Indenture dated as of April 1, 1998.

10.1  Redacted gas supply contract dated October 1, 1997 between Duke Energy
      Trading and Marketing, L.L.C. and the Registrant. (Filed as Exhibit 10 to
      Form 10-Q of the Registrant for the quarter ended June 30, 1998,
      incorporated herein by this reference.)

21    Subsidiary of the Registrant.

                                     IV-2
<PAGE>
 
Supplemental Schedule
                                         Schedule II
                            PROVIDENCE GAS COMPANY
                            ----------------------
                         RESERVES FOR THE YEARS ENDED
                         -----------------------------
         SEPTEMBER 30, 1998, SEPTEMBER 30, 1997 AND SEPTEMBER 30, 1996
         -------------------------------------------------------------
                            (Thousands of Dollars)

<TABLE>
<CAPTION>
                                                                      Charges
                                                                      for
                                                                      Which
                                        Additions                     Reserves
                             Balance    Charged        Other          Were      Balance
                             9/30/97    to Operations  Add (Deduct)   Created   9/30/98
                            --------    -------------  ------------   -------   -------
<S>                         <C>         <C>            <C>            <C>       <C>
RESERVES DEDUCTED FROM
  ASSETS:
  Accounts receivable
    Allowance for
     doubtful accounts      $  1,690      $  4,618     $     --       $4,260    $ 2,048
     Allowance for lease
      receivables -
       current                    49            40           --           --         89
                            --------      --------     --------       ------    -------
     Total                  $  1,739      $  4,658     $     --       $4,260    $ 2,137
                            ========      ========     ========       ======    =======
  Allowance for lease
   receivables -
     long-term              $    401      $     72     $     --       $  101    $   372
                            ========      ========     ========       ======    =======

DEFERRED CREDITS AND
 RESERVES:
 Accumulated deferred
   income taxes             $ 20,598      $    753      $    --       $   --    $21,351
                            --------      --------      -------       ------    -------
 Unamortized investment
  tax credit                   2,354            --           --          157      2,197
                            --------      --------      -------       ------    -------
  Other-
   Liability and
     damage reserve              621           (22)          --          120        479
   Other                       9,071           549         (984)(A)      514      8,122
                            --------      --------      -------       ------    -------
     Total other               9,692           527         (984)         634      8,601
                            --------      --------      -------       ------    -------
   Total deferred
      credits and
      reserves              $ 32,644      $  1,280      $  (984)      $  791    $32,149
                            ========      ========      =======       ======    =======
</TABLE> 

                                     IV-3
<PAGE>
 
                              SCHEDULE II (cont'd)

<TABLE>
<CAPTION>
                                                                      Charges
                                                                      for
                                                                      Which
                                        Additions                     Reserves
                             Balance    Charged        Other          Were           Balance
                             9/30/96    to Operations  Add (Deduct)   Created        9/30/97
                            --------    -------------  ------------   -------        -------
<S>                         <C>         <C>            <C>            <C>            <C>
RESERVES DEDUCTED FROM
  ASSETS:
  Accounts receivable
    Allowance for
     doubtful accounts      $  2,974      $  4,872       $    --      $6,156         $ 1,690
     Allowance for lease
      receivables -
       current                     9            94            --          54              49
                            --------      --------       -------      ------         -------
     Total                  $  2,983      $  4,966       $    --      $6,210         $ 1,739
                            ========      ========       =======      ======         =======
  Allowance for lease
   receivables -
     long-term              $    403      $    138       $    --      $  140         $   401
                            ========      ========       =======      ======         =======

DEFERRED CREDITS AND
 RESERVES:
 Accumulated deferred
   income taxes             $ 19,903      $    695       $    --      $   --         $20,598
                            --------      --------       -------      ------         ------- 
 Unamortized investment
  tax credit                   2,510            --            --         156           2,354
                            --------      --------       -------      ------         -------
  Other-
   Liability and
     damage reserve              561           281            --         221             621
   Other                       7,407         1,267           915(B)      518           9,071
                            --------      --------       -------      ------         -------
     Total other               7,968         1,548           915         739           9,692
                            --------      --------       -------      ------         -------
   Total deferred
      credits and
      reserves              $ 30,381      $  2,243       $   915      $  895         $32,644
                            ========      ========       =======      ======         =======
</TABLE> 

                                     IV-4
<PAGE>
 
SCHEDULE II (cont'd)

<TABLE>
<CAPTION>
                                                                      Charges
                                                                      for
                                                                      Which
                                        Additions                     Reserves
                             Balance    Charged        Other          Were      Balance
                             9/30/95    to Operations  Add (Deduct)   Created   9/30/96
                             -------    -------------  ------------   -------   -------
<S>                         <C>         <C>            <C>            <C>       <C>  
RESERVES DEDUCTED FROM
  ASSETS:
  Accounts receivable
    Allowance for
     doubtful accounts      $  1,916      $  4,884       $   --       $3,826    $ 2,974
     Allowance for lease
      receivables -
       current                   313            --           --          313         --
       other                      80            17           --           88          9
                            --------      --------       ------       ------    -------
     Total                  $  2,309      $  4,901       $   --       $4,227    $ 2,983
                            ========      ========       ======       ======    =======
 Allowance for lease
   receivables -
     long-term              $    651      $  1,179       $   --       $1,427    $   403
                            ========      ========       ======       ======    =======

DEFERRED CREDITS AND
 RESERVES:
 Accumulated deferred
   income taxes             $ 17,892      $  1,968       $   43(C)    $   --    $19,903
                            --------      --------       ------       ------    -------
 Unamortized investment
  tax credit                   2,668            --           --          158      2,510
                            --------      --------       ------       ------    -------
  Other-
   Liability and
     damage reserve              334           520           --          293        561
   Other                       5,140         1,303        1,727(B)       763      7,407
                            --------      --------       ------       ------    -------
     Total other               5,474         1,823        1,727        1,056      7,968
                            --------      --------       ------       ------    -------
   Total deferred
      credits and
      reserves              $ 26,034      $  3,791       $1,770       $1,214    $30,381
                            ========      ========       ======       ======    =======
</TABLE> 

(A) Principally an adjustment due to the regulatory pension liability.
(B) Principally an accrual for environmental investigation and remediation costs
in addition to an adjustment to the regulatory pension liability.
(C) Represents adjustment to the regulatory asset and liability for SFAS No. 109
activity.

                                     IV-5
<PAGE>
 
SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

THE PROVIDENCE GAS COMPANY



                    By   /s/JAMES H. DODGE
                         -----------------------------------------------
                         James H. Dodge, Chairman, President and CEO

                    Date December 22, 1998
                         ------------------------------------------------

Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the Registrant and
in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
     Signature                          Title                    Date
     ---------                          -----                    ----
<S>                        <C>                                   <C>
/s/ JAMES H. DODGE         Chairman, President, and CEO
- ------------------------
James H. Dodge             (Principal Executive Officer)          12/22/98
                                                                  --------
                                                                         
/s/ GARY S. GILLHEENEY     Senior Vice President,                 12/22/98
- ------------------------                                          --------
Gary S. Gillheeney         Chief Financial Officer and                    
                           Treasurer                                      
                                                                         
/s/ GILBERT R. BODELL, JR. Director                               12/22/98
- -------------------------                                         --------
Gilbert R. Bodell, Jr.                                                   
                                                                         
/s/ JOHN H. HOWLAND        Director                               12/22/98
- -------------------------                                         --------
John H. Howland                                                          
                                                                         
/s/ DOUGLAS H. JOHNSON     Director                               12/22/98
- -------------------------                                         --------
Douglas H. Johnson                                                        
                                                                         
/s/ WILLIAM KREYKES        Director                               12/22/98
- -------------------------                                         --------
William Kreykes                                                          
                                                                         
/s/ PAUL F. LEVY           Director                               12/22/98
- -------------------------                                         --------
Paul F. Levy                                                             
                                                                         
/s/ ROMOLO A. MARSELLA     Director                               12/22/98
- -------------------------                                         --------
Romolo A. Marsella                                                       
                                                                         
/s/ M. ANNE SZOSTAK        Director                               12/22/98
- -------------------------                                         --------
M. Anne Szostak                                                          
                                                                         
/s/ KENNETH W. WASHBURN    Director                               12/22/98
- -------------------------                                         --------
Kenneth W. Washburn                                                      
                                                                         
/s/ W. EDWARD WOOD         Director                               12/22/98
- -------------------------                                         -------- 
W. Edward Wood
</TABLE>

                                     IV-6

<PAGE>
 
                                                                     Exhibit 4.5


     =====================================================================


                          THE PROVIDENCE GAS COMPANY

                                      To

                     STATE STREET BANK AND TRUST COMPANY,

                               as  Successor to

                     RHODE ISLAND HOSPITAL TRUST COMPANY,

                                    Trustee



                           _________________________

                       NINETEENTH SUPPLEMENTAL INDENTURE

                           ________________________

                           Dated as of April 1, 1998


     =====================================================================
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE> 
<CAPTION> 
SECTION                              HEADING                               PAGE
<S>                                                                        <C> 
Parties....................................................................  1

FORM SERIES S BOND.........................................................  2

ARTICLE FIRST.    SERIES S BONDS. .........................................  7

         Section 1.01 .....................................................  7
         Section 1.02 .....................................................  8
         Section 1.03 .....................................................  8
         Section 1.04...................................................... 10
         Section 1.05...................................................... 11
         Section 1.06...................................................... 13

ARTICLE SECOND.   ISSUANCE OF $15,000,000 OF SERIES S BONDS AND
                  CLOSING OF SUCH SERIES AT THAT AMOUNT.................... 14

         Section 1.01...................................................... 14
         Section 2.02...................................................... 14

ARTICLE THIRD.    ADDITIONAL PROVISIONS.................................... 14

         Section 3.01...................................................... 14
         Section 3.02...................................................... 14
         Section 3.03...................................................... 14
         Section 3.04...................................................... 14
         Section 3.05...................................................... 15
         Section 3.06...................................................... 15
         Section 3.07...................................................... 15
         Section 3.08...................................................... 15
         Section 3.09...................................................... 16
         Section 3.10...................................................... 16
         Section 3.11...................................................... 17
         Section 3.12...................................................... 17
         Section 3.13...................................................... 17
         Section 3.14...................................................... 17
         Section 3.15...................................................... 17
         Section 3.16...................................................... 17

Signatures................................................................. 19
</TABLE> 

ATTACHMENTS TO NINETEENTH SUPPLEMENTAL INDENTURE:

SCHEDULE I   - Schedule of Property and Interests Therein
SCHEDULE II  - Schedule of Released Property
<PAGE>
 
  THIS NINETEENTH SUPPLEMENTAL INDENTURE, dated as of April 1, 1998, between THE
PROVIDENCE GAS COMPANY, a corporation created by Special Act of the General
Assembly of the State of Rhode Island ( herein after sometimes called the
"Company"), party of the first part, and STATE STREET BANK AND TRUST COMPANY, a
Massachusetts trust company (successor to Rhode Island Hospital Trust National
Bank, which succeeded Rhode Island Hospital Trust Company), as trustee under the
Company's First Mortgage herein below mentioned (hereinafter sometimes called
the "Trustee"), party of the second part:

  WHEREAS the Company by an Indenture, dated as of January 1, 1922, as
supplemented by a First Supplemental Indenture, dated as of February 6, 1933, a
Second Supplemental Indenture, dated as of June 1, 1944, a Third Supplemental
Indenture, dated as of April 1, 1948, a Fourth Supplemental Indenture, dated as
of January 1, 1958, a Fifth Supplemental Indenture, dated as of July 1, 1960, a
Sixth Supplemental Indenture, dated as of September 1, 1963, a Seventh
Supplemental Indenture, dated as of November 1, 1971, an Eighth Supplemental
Indenture, dated as of July 1, 1972, a Ninth Supplemental Indenture, dated as of
October 1, 1975, a Tenth Supplemental Indenture, dated as of April 1, 1976, an
Eleventh Supplemental Indenture, dated as of September 1, 1978, a Twelfth
Supplemental Indenture, dated as of September 1, 1983, a Thirteenth Supplemental
Indenture, dated as of May 1, 1986, a Fourteenth Supplemental Indenture, dated
as of August 1, 1988, a Fifteenth Supplemental Indenture, dated as of June 1,
1990, a Sixteenth Supplemental Indenture, dated as of September 1, 1992, a
Seventeenth Supplemental Indenture, dated as of November 1, 1993, and an
Eighteenth Supplemental Indenture, dated as of December 1, 1995 (said
instruments being herein after sometimes called, respectively, the "Original
Indenture", the "First Supplemental Indenture",  the "Second Supplemental
Indenture", the "Third Supplemental Indenture", the "Fourth Supplemental
Indenture", the "Fifth Supplemental Indenture", the "Sixth Supplemental
Indenture", the "Seventh Supplemental Indenture", the "Eighth Supplemental
Indenture", the "Ninth Supplemental Indenture", the "Tenth Supplemental
Indenture", the "Eleventh Supplemental Indenture", the "Twelfth Supplemental
Indenture", the "Thirteenth Supplemental Indenture", the "Fourteenth
Supplemental Indenture", the "Fifteenth Supplemental Indenture", the "Sixteenth
Supplemental Indenture", the "Seventeenth Supplemental Indenture", and the
"Eighteenth Supplemental indenture", and the Original Indenture as supplemented
by whatsoever supplements , including, if apt, this Nineteenth Supplemental
Indenture, as have been or shall have been executed and delivered at the
pertinent time, being herein after sometimes called, collectively, the
"Indenture"), mortgaged its property and franchises, including after-acquired
property and franchises, to the Trustee to secure its First Mortgage Bonds
issued and to be issued thereunder accordance with the provisions of said
Indenture, and there are now outstanding thereunder $10,000,000 principal amount
of First Mortgage Bonds, Series M, 10.25% due July 31, 2008, being all of an
original issue of $10,000,000 principal amount of bonds of said Series M,
$10,000,000 principal amount of First Mortgage Bonds, Series N, 9.63% due May
30, 2020, being all of an original issue of $10,000,000 principal amount of
bonds of said Series N, $12,5000,000 principal amount of First Mortgage Bonds,
Series O, 8.46% due September 30, 2022, being all of an original issue of
$12,500,000 principal amount of bonds of said Series O, $12,500,000 principal
amount of First Mortgage Bonds, Series P, 8.09%
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture


due September 30, 2022, being all of an original issue of $12,500,000 principal
amount of bonds of said Series P, $9,600,000 principal amount of First Mortgage
Bonds, Series Q, 5.62% due November 30, 2003, being a portion of an original
issue of $16,000,000 principal amount of  bonds of said Series Q and $15,000,000
principal amount of  First Mortgage Bonds, Series R, 7.50% due December 15,
2025, being all of an original issue of $15,000,000 principal amount of bonds of
said Series R; and

  WHEREAS the Company has determined, by due corporate action, to provide for
the immediate issuance, execution, authentication and delivery of $15,000,000 in
aggregate principal amount of its fully registered First Mortgage Bonds in the
principal amount of $15,000,000 to be known as the Company's First Mortgage
Bonds, Series S, 6.82% (herein after sometimes called "bonds of Series S" or
"Series S bonds") due April 1, 2018; and

  WHEREAS each of the bonds to be issued hereunder and the certificate of the
Trustee to be endorsed on the bonds of such series are to be substantially in
the following forms, respectively, to wit:

[FORM OF SERIES S BOND]

No. R-                                                                $ ________

                                                                PPN_____________

THE PROVIDENCE GAS COMPANY

FIRST MORTGAGE BOND, SERIES S, 6.82%

Due April 1, 2018

  THE PROVIDENCE GAS COMPANY, a corporation created by Special Act of the
General Assembly of the State of Rhode Island (herein after called the
"Company"), for value received, hereby promises to pay
____________________________or registered assigns, on the first day of April,
2018, the principal sum of _____________________________Dollars
($_____________), and to pay interest thereon (unless this bond shall have been
called for previous redemption and payment duly provided therefor) at the rate
of six and eighty-two hundredths per cent (6.82%) per annum, payable semi-
annually on the first day of April and October in each year, commencing the
first day of October, 1998, until said principal sum shall have become due.  The
Company promises to pay, on demand, interest on any overdue principal (including
any overdue prepayment of principal) and premium, if any, and (to the extent
permitted by applicable law) on any overdue installment of interest, at the rate
of seven and eighty-two hundredths per cent (7.82%) per annum.  Interest shall
be computed on the basis of a 360-day year of twelve 30-day months, except that
this means of computation shall not operate to deprive the holder of this bond
of interest for any day or days when applied to a period of less than six
calendar months.  The principal of, interest on and

                                      -2-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture


premium, if any, on this bond shall, subject to the provisions of Section 3.07
of the Nineteenth Supplemental Indenture hereinafter described, be payable at
the office of State Street Bank and Trust Company, in Boston, Massachusetts (or
at the office of its successor trustee in the trust to which reference is herein
after made), in such coin or currency of the United States of America as shall
be legal tender for the payment of public and private debts at the time of
payment.

    This bond is one of a duly authorized issue of First Mortgage Bonds of the
Company, unlimited as to aggregate principal amount except as set forth in the
Indenture hereinafter mentioned, issuable in series and is one of a series known
as First Mortgage Bonds, Series S, 6.82%, all bonds of all series being issued
and to be issued under and pursuant to and all equally secured (except as and
sinking or other analogous fund, established in accordance with the provisions
of the Indenture hereinafter mentioned, may afford additional security for the
bonds of any particular series) by an Indenture, dated as of January 1, 1922, as
supplemented by a First Supplemental Indenture, dated as of February 6, 1933, a
Second Supplemental Indenture, dated as of June 1, 1944, a Third Supplemental
Indenture, dated as of April 1, 1948, a Fourth Supplemental Indenture, dated as
of January 1, 1958, a Fifth Supplemental Indenture, dated as of  July 1, 1960, a
Sixth Supplemental Indenture, dated as of September 1, 1963, a Seventh
Supplemental Indenture, dated as of November 1, 1971, an Eighth Supplemental
Indenture, dated as of  July 1, 1972, a Ninth Supplemental Indenture, dated as
of October 1, 1975, a Tenth Supplemental Indenture, dated as of April 1, 1976,
an Eleventh Supplemental Indenture, dated as of September 1, 1978, a Twelfth
Supplemental Indenture, dated as of September 1, 1983, a Thirteenth Supplemental
Indenture, dated as of May 1, 1986, a Fourteenth Supplemental Indenture, dated
as of August 1, 1988, a Fifteenth Supplemental Indenture, dated as of June 1,
1990, a Sixteenth Supplemental Indenture, dated as of September 1, 1992, a
Seventeenth Supplemental Indenture, dated as of November 1, 1993, an Eighteenth
Supplemental Indenture, dated as of December 1, 1995 and a Nineteenth
Supplemental Indenture, dated as of April 1, 1998 (said twenty instruments being
hereinafter called, collectively, the "Indenture"), all duly executed and
delivered by the Company to State Street Bank and Trust Company, in Boston
Massachusetts, as successor to Rhode Island Hospital Trust National Bank, which
succeeded Rhode Island Hospital Trust Company (hereinafter called the
"Trustee"), as trustee, to which Indenture and to all indentures supplemental
thereto reference is hereby made for a description of the property transferred,
assigned and mortgaged thereunder, the nature and extent of the security, the
terms and conditions upon which the bonds are secured and additional bonds may
be issued and secured, and the rights of the holders or registered owners of
said bonds, of the Trustee and of the Company in respect of such security.
Subsequent series of said bonds may vary as to date, date of maturity, rate of
interest and in other ways as in the Indenture provided or permitted.

    Notwithstanding any provisions of the Indenture (including, without
limitation, Section 41 thereof) the bonds of Series S shall be subject to
redemption only in the manner and to the extent provided in Section 1.03 and
Section 1.05 of the Nineteenth Supplemental Indenture.

                                      -3-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture
 

   This bond is transferable by the registered owner hereof, in person or by
duly authorized attorney, on books to be kept for that purpose in the office of
the Company, in Providence, Rhode Island, upon surrender thereof at said office
for cancellation and upon presentation of a written instrument of transfer duly
executed, and thereupon the Company shall issue in the name of the transferee or
transferees, and the Trustee shall authenticate and deliver, a new bond or
bonds, of like form and in an authorized denomination or in authorized
denominations of the same series, for the same aggregate principal amount.
Bonds of this series, upon surrender thereof at said office, may be exchanged
for the same aggregate principal amount of bonds of this series of another
authorized denomination or other authorized denominations, all upon payment of
the charges, if any, and subject to the terms and conditions specified in the
Indenture.

   In case of default by the Company, as set forth in the Indenture, the
principal of all the bonds of each and every series issued and outstanding
thereunder may be declared or may become due and payable in the manner and with
the effect provided in the Indenture.

          No recourse shall be had for the payment of any part of either the
principal or interest of this bond, or for any claim based hereon, or otherwise
in any manner in respect hereof or in respect of the Indenture, to or against
any stockholder, officer or director, past, present or future, of the Company,
by virtue of any statute or provision or rule of law, or by the enforcement of
any assessment or penalty, all such liability being expressly waived and
released by the acceptance of this bond.

          This bond shall not become obligatory for any purpose until
authenticated by the execution by the Trustee of the certificate endorsed
hereon.

          IN WITNESS WHEREOF, THE PROVIDENCE GAS COMPANY has caused its
corporate seal to be hereto affixed and this bond to be signed by its President
or Vice President and its Treasurer or Assistant Treasurer, the ________day of
________________________________.


                                  THE PROVIDENCE GAS COMPANY

                              By______________________________________
                                          President

[CORPORATE SEAL]

                              and
                              by____________________________________
                                          Treasurer



                                      -4-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture



[FORM OF TRUSTEE'S CERTIFICATE]

          This is one of the bonds of Series S of the issue described in the
Indenture within mentioned.

                              STATE STREET BANK AND TRUST COMPANY,
                                 as Successor to Rhode Island Hospital Trust
                                 Company, Trustee

 
                              By________________________________________
                                         Authorized Signature

          WHEREAS the Company also desires to confirm the lien of the Indenture
upon property (intended to be thereby mortgaged) acquired by the Company since
the execution of the Eighteenth Supplemental Indenture;

          NOW, THEREFORE, THIS NINETEENTH SUPPLEMENTAL INDENTURE WITNESSETH:
That The Providence Gas Company, pursuant to and in execution of the powers,
authorities and obligations conferred, imposed and reserved in the Original
Indenture, as heretofore supplemented by the First, Second, Third, Fourth,
Fifth, Sixth, Seventh, Eighth, Ninth, Tenth, Eleventh, Twelfth, Thirteenth,
Fourteenth, Fifteenth, Sixteenth, Seventeenth and Eighteenth Supplemental
Indentures, and every other power, authority and obligation thereto appertaining
or enabling, in consideration of the premises and of the authentication,
purchase and acceptance of the Series S bonds, of $10 duly paid to the Company
by the Trustee and of other good and valuable considerations, receipt whereof is
hereby acknowledged, and for the purpose of confirming the Original Indenture
and said First, Second, Third, Fourth, Fifth, Sixth, Seventh, Eighth, Ninth,
Tenth, Eleventh, Twelfth, Thirteenth, Fourteenth, Fifteenth, Sixteenth,
Seventeenth and Eighteenth Supplemental Indentures, as hereby supplemented, and
in order to secure, equally and ratably, the payment of the principal of and the
interest on all of the bonds at any time outstanding under the Indenture
according to their tenor, purport and effect and in order to secure the faithful
performance and observance of all of the covenants and conditions set forth
herein and in the Original Indenture, as heretofore supplemented by the First,
Second, Third, Fourth, Fifth, Sixth, Seventh, Eighth, Ninth, Tenth, Eleventh,
Twelfth, Thirteenth, Fourteenth, Fifteenth, Sixteenth, Seventeenth and
Eighteenth Supplemental Indentures, by these presents hereby confirms (except
for property hereinafter expressly reserved and excluded from the lien of the
Indenture) the mortgage, conveyance, pledge, assignment and transfer of the
properties, franchises, rights and privileges set forth and described in the
Original Indenture and said Second, Third, Fourth, Fifth, Sixth, Seventh,
Eighth, Ninth, Tenth, Eleventh, Twelfth, Thirteenth, Fourteenth, Fifteenth,
Sixteenth, Seventeenth and Eighteenth Supplemental Indentures, and does hereby
grant, bargain, sell, release, convey, mortgage, confirm, assign, transfer,
pledge and set over unto the Trustee, and its successors in the trust, and its
and their assigns, upon the trusts established by the Indenture, all and
singular:

                                      -5-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture
 

          A.  The "Schedule of Property and Interests Therein" hereto attached 
as Schedule I and made a part hereof.

          B.  The Company's gasworks, plant and machinery, purifiers,
generators, service and other pipes, holders, mains, meters, shops, tools,
implements, fixtures, appurtenances, and (except for property hereinafter
expressly reserved and excluded from the lien of the Indenture) all other real
and tangible personal property now owned or which shall hereafter be acquired by
the Company, or its successor or successors, and used or useful in connection
with its business of making, distributing, purchasing and selling gas, and with
any other business authorized or permitted by the Company's charter, and all of
the Company's leasehold interests in any of such property now or hereafter
leased by the Company as a leasee and all corporate and other franchises of the
Company, and all permits, ordinances, easements, privileges, immunities and
licenses, all rights to lay, construct, maintain and operate systems for the
distribution and transmission of gas and other agencies for the supply to itself
or others of light, heat and power, and all rights of way, grants and consents
which the Company now owns or which it may hereafter acquire, being intended to
include, among other things covered by the Indenture, the entire existing and
future light, heat and power business of the Company and all of its existing and
all of its future rights, franchises, permits, ordinances and licenses to
transact and conduct the same, and each and every part thereof (except as
hereinafter noted) as provided in the Original Indenture and said Second, Third,
Fourth, Fifth, Sixth, Seventh, Eighth, Ninth, Tenth, Eleventh, Twelfth,
Thirteenth, Fourteenth, Fifteenth, Sixteenth, Seventeenth and Eighteenth
Supplemental Indentures, which are hereby made a part hereof, to the same extent
as if set forth herein at length, excepting, however, and there is expressly
reserved and excluded from the lien of the Indenture:

               (1) Such of said properties or interests therein heretofore
conveyed to the Trustee as may have been released by the Trustee or sold or
otherwise disposed of as permitted by the provisions of the Indenture; and

               (2) All right, title and interest of the Company now owned or
hereafter acquired in and to

                    (a)  all cash, bonds, shares of stock, obligations and other
securities not deposited with the Trustee under the provisions of the
Indenture;

                    (b)  all accounts and bills receivable (other than for the
recovery of real property or establishing a lien or charge thereon or right
therein) and choses in action not specifically assigned to the Trustee and
pledged with the Trustee hereunder;

                    (c)  all goods, wares, merchandise, products and by-products
held for sale in the ordinary course of business;

                    (d)  all materials and supplies held for consumption in
operation;

                                      -6-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture
 
                    (e) all conversion burners, water heaters, stoves and
refrigerators rented to customers or held for rental;

                    (f)  all motor vehicles; and

               (3) The last day of each of the demised terms created by any
lease of property now leased to the Company and the last day of any demised term
under each and every lease hereafter made or acquired by the Company and, under
each and every renewal of any lease the last day of each and every such demised
term being hereby expressly reserved to and by the Company; until and unless a
default shall be made in one or more obligations of the Company under the
Indenture and such default shall have continued beyond the period of grace, if
any, applicable in respect thereof, and the Trustee or any receiver or other
official shall take control of the mortgaged properties, in which event the
Indenture shall (to the extent permitted by law) become and be a lien upon all
of the classes of property set forth in 2 above (subject to any liens or
encumbrances then existing thereon), and the Trustee, receiver or other official
shall (to the extent permitted by law) be entitled to possess, use and dispose
of the same in carrying on the operation of the Company's enterprise and to
include the same in any sale under power of sale conferred by the Indenture or
by law.

          TO HAVE AND TO HOLD all of said property, real, personal and mixed,
now owned or hereafter acquired, mortgaged and conveyed by the Company as
aforesaid, or intended so to be, unto the Trustee, and its successors in said
trust, and to them and to their assigns forever.

          IN TRUST, NEVERTHELESS, for the purposes, with the powers and subject
to the agreements, covenants and conditions set forth and expressed in the
Original Indenture, as supplemented and modified by the First Supplemental
Indenture,  the Second Supplemental Indenture, the Third Supplemental Indenture,
the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth
Supplemental Indenture, the Seventh Supplemental Indenture, the Eighth
Supplemental Indenture, the Ninth Supplemental Indenture, the Tenth Supplemental
Indenture, the Eleventh Supplemental Indenture, the Twelfth Supplemental
Indenture, the Thirteenth Supplemental Indenture, the Fourteenth Supplemental
Indenture, the Fifteenth Supplemental Indenture, the Sixteenth Supplemental
Indenture, the Seventeenth Supplemental Indenture, Eighteenth Supplemental
indenture and this instrument, it being agreed as follows, to with:

                                 ARTICLE FIRST
                                SERIES S BONDS

  Section 1.01.  There shall be and is hereby created a new series of bonds
entitled "First Mortgage Bonds, Series S, 6.82%" (herein sometimes called the
"Series S bonds" or "bonds of Series S"), limited in aggregate principal amount,
except as noted in Section 2.02 hereof, to Fifteen Million Dollars
($15,000,000), and to be issued as prescribed in Section 2.01 hereof.  Series S
bonds shall be fully registered bonds of the denomination of One Thousand
Dollars ($1,000) and multiples thereof.  All Series S bonds shall mature April
1, 2018 and shall bear interest at the rate and payable at the times specified
in the form of Series S bond set forth herein.  The principal of, interest on
any premium, if any, on bonds of Series S

                                      -7-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

shall, subject to the provisions of Section 3.07, be payable at the office of
the Trustee in such coin or currency of the United States of America as shall
be legal tender for the payment of public and private debts.

          Bonds of Series S shall be numbered "R-1" and consecutively upwards.

   Section 1.02.  Bonds of Series S shall be exchangeable for a like aggregate
principal amount of bonds of such series of another authorized denomination or
other authorized denominations.

  Section 1.03.  Notwithstanding any provisions of the Indenture (including,
without limitation, section 41 thereof) the bonds of Series S shall be subject
to redemption only in the manner and to the extent provided in this Section 1.03
and in Section 1.05.

          (a)  Optional Redemption of Series S Bonds with Premium.  The Company
   shall have the option, at any time and from time to time, of redeeming the
   outstanding Series S bonds, either in whole or in part (but if in part then
   in units of $100,000) upon not less than 30 days nor more than 60 days prior
   written notice to each registered owner, by payment of the principal amount
   of the Series S bonds to be redeemed, and accrued interest thereon to, but
   not including, the date of redemption together with the Yield-Maintenance
   Premium, if any.

       As used in this Section 1.03:

          "Yield-Maintenance Premium" shall mean, with respect to any series S
     bond, a premium equal to the excess, if any, of the Discounted Value of the
     Called Principal of such Series S bond over the amount of such Called
     Principal; provided that the Yield-Maintenance Premium shall in no event be
     less than zero.

          "Called Principal" shall mean, with respect to any Series S bond, the
     principal of such Series S bond that is to be redeemed pursuant to the
     provisions of this Section 1.03.

          "Discounted Value" shall mean, with respect to the Called Principal of
     any Series S bond, the amount calculated by discounting all Remaining
     Scheduled Payments with respect to such Called Principal from their
     respective scheduled due dates to the date on which such Called Principal
     is to be redeemed, in accordance with accepted financial practice and at a
     discount factor (applied on a semiannual basis) equal to the sum of (i) the
     Reinvestment Yield with respect to such Called Principal, plus (ii) 0.25%.

          "Reinvestment Yield" shall mean the yield reported as of 10:00 a.m.
     Boston, Massachusetts time on the fifth Business Day prior to the date of
     redemption of the Series S bonds on the display designated "USD" of the
     Bloomberg Financial Markets Services Screen (or, if not available, any
     other nationally recognized trading screen reporting on-line intraday
     trading in United States government securities) for actively traded U.S.
     Treasury securities

                                      -8-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

     having a maturity corresponding to the maturity of the Called Principal or
     if such yield shall not be reported as of such time or shall not be usable,
     then the arithmetic mean of the yields for the two columns under the
     heading "Week Ending" published in the Statistical Release under the
     caption "Treasury Constant Maturities" for the maturity of the Called
     Principal (rounded to the nearest month).  If no maturity exactly
     corresponds to the maturity of the Called Principal, yields for the next
     longer and the next shorter published maturities shall be calculated
     pursuant to the foregoing sentence and the Reinvestment Yield shall be
     interpolated from such yields on a straight-line basis (rounding in each of
     the relevant periods to the nearest month).  For the purposes of
     calculating the Reinvestment Yield, the most recent Statistical Release
     published prior to the date of determination of the Yield-Maintenance
     Premium shall be used.
 
          "Statistical Release" shall mean the then most recently published
     statistical release designated "H.15(519)" or any successor publication
     which is published weekly by the Federal Reserve System and which
     establishes yields on actively traded U.S. Government Securities adjusted
     to constant maturities or, if such statistical release is not published at
     the time of any determination hereunder, then such other reasonably
     comparable index which shall be designated by the holders of 66-2/3% in
     aggregate principal amount of the outstanding Series S bonds.

          "Remaining Scheduled Payments" shall mean, with respect to the Called
Principal of any Series S bond, all payments of such Called Principal and
interest thereon that would be due after the date scheduled for redemption
thereof if no redemption of such Called Principal were made prior to its
scheduled due date.

          "Business Day", as used in the definition of Reinvestment Yield, shall
     mean any day excluding Saturday, Sunday and any day which shall be , in New
     York, New York, a legal holiday or a day on which banking institutions are
     authorized by law to close.

     (b)   Optional Redemption of Series S Bonds Out of Condemnation Proceeds.
In the event that any property subject to the lien of the Indenture is (x) taken
by any governmental or other lawful authority pursuant to a Qualified
Condemnation, or (y) sold by the Company in anticipation of a Qualified
Condemnation for a price which, in the good faith judgment of the Board of
Directors of the Company (as evidenced by a resolution thereof) is deemed to be
equal to or greater than the fair market value of the property so sold, then the
Company shall have the option (to be exercised within 60 days after such taking
or sale), of applying a pro rata portion of the net cash proceeds resulting from
such taking or sale to the redemption of outstanding Series S bonds by payment
of the principal amount of the Series S bonds to be redeemed and accrued
interest thereon to the date of redemption plus, in the cash of any event
described in clause (y) above, an amount equal to the Yield-Maintenance

                                      -9-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture


Premium, if any.  The pro rata portion shall be determined by reference to all
bonds of all series then outstanding under the Indenture.

          As used in this Section 1.03(b) "Qualified Condemnation" shall mean
any taking by condemnation or eminent domain which (i) results in an award to
the Company which, in the good faith judgment of the Board of Directors of the
Company (as evidenced by a resolution thereof) is deemed to be equal to or
greater than the fair market value of the property so taken, and (ii) is deemed
by said Board of Directors (as evidenced by a resolution thereof) to be
authorized and proper or which has been contested by the Company in good faith
and by appropriate proceedings.
 
          (c)   Miscellaneous.  Except as herein otherwise set forth, the
provisions of Article Fourth of the Original Indenture, with respect to the
procedures for call and redemption, prior to maturity, of Series A and Series B
bonds, shall apply to the call and redemption, prior to maturity, of all bonds
of Series S so to be called and redeemed.  All Series S bonds redeemed pursuant
to the provisions hereof shall be canceled by the Trustee and shall be delivered
to or upon the order of the Company, and shall not be reissued.

          Whenever any series S bonds are to be redeemed, the Trustee shall
allocate to each registered owner a proportion of the Series S bonds to be
redeemed, equal, as nearly as practicable, to the proportion that the principal
amount of the bonds of such series then outstanding hereunder, registered in the
name of such owner, bears to the principal amount of all bonds of such series
then outstanding under the Indenture.

          Redemption notices for Series S bonds shall be given to each
registered owner by registered mail and not by publication.  The redemption
notice given to each registered owner shall comply with the provisions of
Article Fourth of the Original Indenture and shall also specify (i) the
principal amount of such owner's Series S bonds to be redeemed, (ii) the accrued
interest payable in connection with such redemption, and (iii) the Company's
estimate of the Yield-Maintenance Premium, if any, payable in connection with
such redemption.  The Company's final computation of the amount of any Yield-
Maintenance Premium payable in connection with any such redemption shall
furnished to the registered owners of the series S bonds to be prepaid as soon
as practicable after determination thereof and, in all events, not less than
three days prior to the date of such redemption.  The Trustee shall have no
responsibility for determining independently the amount of any Yield-Maintenance
Premium payable in connection with any redemption hereunder.

   Section 1.04.   The Company covenants and agrees that, so long as any Series
S bonds are outstanding hereunder, it will pay no dividends and make no
distribution either in cash or property (other than dividends payable in its
common stock), on any class of its capital stock and will purchase or redeem
none of its stock of any class if the sum of all dividends and all
distributions, purchases and redemptions on or of its stock of any class paid or
made by it (including any then proposed to be paid or made) after September 30,
1997 and any losses incurred after that date, charged or properly chargeable
against earned surplus, would exceed the amount of its net income earned after
that date plus Twelve Million Dollars


                                     -10-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

($12,000,000), provided, however, that there shall be excluded in making the
calculation aforementioned so much of the aggregate of expenditures, including
the reasonable value of property or securities, made by the Company for the
redemption or purchase of its capital stock as does not exceed the aggregate of
all amounts, including the reasonable value of property or securities, received
by it through the disposal, since September 30, 1997, of additional capital
stock.  Notwithstanding the foregoing sentence, the Company may make regular
dividend payments on, and mandatory sinking fund redemptions of , all shares of
its 8.7% Redeemable Cumulative Preferred Stock or any class of its preferred
stock which may hereafter be issued, to persons other than person controlled by,
controlling or under common control with the company, provided that such
payments and redemptions made after September 30, 1997 shall be included in any
computation under this Section 1.04.  The term  "control," as used in this
paragraph, shall mean ownership of 10% or more of the voting securities of the
Company or such other person.  The term "net income," as used in this paragraph,
shall mean the net income available for dividends, determined in accordance with
generally accepted accounting principles, after allowance for all taxes and
other income deductions.  The term "common stock" , as used in this paragraph,
shall mean stock of the Company of the class which is now outstanding.

          Section 1.05.  In the event that a Restructuring Put Event (as defined
below) shall occur or the Company shall have knowledge of any proposed
Restructuring Transaction which will result in a Restructuring Put Event, the
Company will give written notice (the "Restructuring Put Notice") of such fact
to the Trustee and all holders of the bonds of Series S.  The Restructuring Put
Notice shall be delivered promptly upon receipt of such knowledge by the Company
and in any event no later than five days after such Restructuring Put Event.
The Restructuring Put Notice shall (I) describe the facts and circumstances of
such Restructuring Put Event (including the effective date of such Restricting
Put Event) in reasonable detail, (ii) make reference to this Section 1.05 and
the right of the holders of the bonds of Series S to require the Company to
redeem their bonds of Series S on the terms and conditions provided for herein,
(iii) state that each holder must make a declaration of its intent to have the
Series S bonds held by it redeemed, and (iv) specify the date by which the
holder must respond to such restructuring Put Notice pursuant to this Section
1.05 in order to make such declaration.

          Upon the receipt of such Restructuring Put Notice or, if no
Restructuring Put Notice is given, upon receipt of actual knowledge of a
Restructuring Put Event, the holder of any bonds of Series S shall have the
privilege, upon written notice (the "Declaration Notice") to the Trustee and the
Company, of declaring all Series S bonds held by such holder serving such
Declaration Notice to become due and payable and thereupon such Series S bonds
shall become due and payable on such date (the "Restructuring Put Payment Date")
as the Company shall specify in a written notice of redemption delivered to the
Trustee and such holder, which notice shall be delivered by the Company to the
Trustee and such holder not later than 10 days after the Company's receipt of
the Declaration Notice.  The Company covenants and agrees to redeem in full on
the Restructuring Put Payment Date all bonds of Series S held by such holder
serving such Declaration Notice to the Company.  The Restructuring Put Payment
Date shall be not later than 20 days after the date that the Company has
received the Declaration Notice.  In the event that a Restructuring Put Notice

                                     -11-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

has in fact been given as herein above required, such Declaration Notice shall
be served prior to 60 days after receipt of such Restructuring Put Notice, and
in the event that a Restructuring Put Notice has not been given as herein above
required, such Declaration Notice shall be served prior to 30 days after the
holder serving such Declaration Notice shall have actual knowledge of such
Restructuring Put Event.  In the event that a Restructuring Put Notice is given
and the Company does not receive a Declaration Notice within the time period set
forth above, the Series S bonds held by such holder shall become due and payable
as a result of such Restructuring Put Event on a Restructuring Put Payment Date
within 20 days following such time period as shall be specified by a written
notice of redemption delivered by the Company to the Trustee and such holder not
later than 10 days following such time period and the Company covenants and
agrees to redeem in full on such Restructuring Put Payment Date all bonds of
Series S held by such holder; provided that the bonds of Series S of such holder
shall not be subject to such redemption if the Company receives within such time
period written notice from such holder in which it elects not to exercise the
right to have such bonds redeemed.

          As used herein, the following terms shall have the meanings set forth
below:

          A "Restructuring Transaction" shall mean any of the following:  (i)
the consolidation of the Company into or merger of the Company with any other
Person, (ii) any transaction as a result of which Providence Energy Corporation
shall own less than 51% of the Voting Stock of the Company, (iii) the sale by
the Company of all or substantially all of its assets to another Person or (iv)
the acquisition by the Company for all or substantially all of the assets of
another Person.

          A "Restructuring Put Event" shall occur if (i) a Restructuring
Transaction has taken place or shall take place and (ii) either (A) the
Company's long-term secured senior debt rating by a Designated Rating Agency
prior to the Restructuring Transaction shall be an Acceptable Rating and after
giving effect to the Restructuring Transaction and as a result thereof, the
rating of the long-term secured senior debt of the Restructuring Surviving
Entity by a Designated Rating Agency shall be less than an Acceptable Rating or
(B) the Company's long-term secured senior debt rating by a Designated Rating
Agency prior to the Restructuring Transaction (the "Company secured Senior Debt
Rating") shall be less than an Acceptable Rating and after giving effect to the
Restructuring Transaction and as a result thereof, the rating of the long-term
secured senior debt of the Restructuring Surviving Entity by a Designated Rating
Agency shall be lower than the Company Secured Senior Debt Rating.

          The "Restructuring Surviving Entity" shall mean after giving effect to
a Restructuring Transaction, the Company, provided that (i) if the Restructuring
Transaction is a merger or consolidation in which the Company is merged with or
consolidated into another entity, the surviving entity shall be Restructuring
Surviving Entity or (ii) if the Restructuring Transaction is a conveyance by the
Company of all or substantially all of its assets, the entity acquiring such
assets shall be the Restructuring Surviving Entity.

                                     -12-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

     "Acceptable Rating" shall mean in the case of S&P a rating of BBB (or the
then current equivalent thereof) or better and in the case of Moody's a rating
of Baa2 (or the then current equivalent thereof) or better or in the case of any
other Designated Rating Agency, a rating equivalent to an Acceptable Rating
assigned by S&P or Moody's or in the event no such equivalent rating is so
assigned, then the highest rating assigned by such other Designated Rating
Agency most closely approximately such rating by S&P or Moody's.

     "Designated Rating Agency" shall mean S&P or Moody's; provided, that in the
event both S&P and Moody's are not rating the long-term secured senior debt of
Company or the Restructuring Surviving Entity at a time when such a rating is
required to determine whether a Restructuring Put Event has occurred, then
another rating agency of recognized national standing and satisfactory to the
holders of 66-2/3% in principal amount of the Series S bonds then outstanding.

     "Moody's" shall mean Moody's Investors Service, Inc.

     "Person" shall mean an individual, a partnership, limited liability
company, corporation or trust.

     "S&P" shall mean Standard & Poor's Corporation.

     "Voting Stock" shall mean securities of any class or classes, the holders
of which are ordinarily, in the absence of contingencies, entitled to elect a
majority of the corporate directors (or others performing similar functions).

     All redemptions of Series S bonds pursuant to this Section 1.05 shall be
made by the payment of the aggregate principal amount remaining unpaid on such
Series S bonds and accrued inters thereon to the date of such redemption. Any
redemption of less than all of the outstanding Series S bonds made pursuant to
this Section 1.05 shall be applied to the payment in full of the Series S bonds
held by the holders providing a Declaration Notice and by the holders referred
to in the last sentence of the second paragraph of this Section 1.05.

     Section 1.06.  The Company covenants and agrees that monies received by the
Trustee described in the first sentence of Section 41 of the Indenture will not
be applied to the purchase of any bonds issued and outstanding under the
Indenture unless the Company purchases bonds of each outstanding series with
such monies in an amount equal to the percentage thereof which the principal
amount of the bonds of such series is of the principal amount of the bonds of
all series then outstanding. In the event the Company purchases any bonds
pursuant to the preceding sentence, such bonds shall immediately thereafter be
canceled and no bonds of the same series shall be issued in substitution
therefor.

                                      -13-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

                                ARTICLE SECOND
                 ISSUANCE OF $15,000,000 OF SERIES S BONDS AND
                     CLOSING OF SUCH SERIES AT THAT AMOUNT

     Section 2.01.  Upon the execution and delivery hereof, the Company will
execute and deliver to the Trustee and the Trustee will authenticate and deliver
to the Company Fifteen Million Dollars ($15,000,000) in aggregate principal
amount of Series S bonds.

     Section 2.02.  The issue of Series S bonds hereunder is hereby limited to
the Fifteen Million Dollars ($15,000,000) in aggregate principal amount of bonds
of such series to be initially issued as provided in Section 2.01 hereof and to
Series S bonds issued in exchange or substitution for outstanding Series S bonds
under the provisions of the Indenture, permitting the exchange of bonds for
other bonds (under the provisions of Section 1.02 hereof), or permitting the
issuance of bonds in lieu of lost, stolen, destroyed or mutilated bonds, or
permitting the exchange of definitive bonds for temporary bonds.

                                 ARTICLE THIRD
                             ADDITIONAL PROVISIONS

     Section 3.01.  The Company covenants and agrees that it has good right and
lawful authority to mortgage the properties described in the granting clauses
hereof and after-acquired property as provided herein and that it is lawfully
seized and possessed of the same (except with respect to after-acquired
property).

     Section 3.02.  The Company covenants and agrees that since the date of the
Eighteenth Supplemental Indenture no real estate or interest therein has been
taken by exercise of the right of eminent domain or released from the Indenture
or subjected to any easement which has not been terminated of record except as
listed on the "Schedule of Released Property" attached hereto as Schedule II.

     Section 3.03.  The Company covenants and agrees that (a) it will not
incorporate into its gas distribution system for operation as lessee or
otherwise any personal property or fixtures owned by another person or entity
except such property of a type expressly reserved and excluded from the lien of
the Indenture; and (b) without limiting the generality of the foregoing, it will
not enter into, as lessee, any leases of personal property, fixtures or improved
real property if the cost of all such items so leased less accumulated
depreciation taken from time to time in accordance with generally accepted
accounting principles would be in excess of 15% of the principal amount of bonds
then outstanding under the Indenture.

     Section 3.04.  The Company covenants and agrees that it will promptly
comply with all laws, ordinances or governmental rules and regulations to which
it is subject, including without limitation, the Occupational Safety and Health
Act of 1970, the Employee Retirement Income Security Act of 1974 and all laws,
ordinances, governmental rules and regulations relating to environmental
protection in all applicable jurisdictions, the violation of which would
materially and adversely affect the properties, business, prospects, profits or
condition of the Company or would result in any lien or charge upon any property
of the

                                      -14-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

Company which would materially and adversely affect the conduct of the Company's
operations.

     Section 3.05.  The Company covenants and agrees that it will not permit any
employee benefit plan maintained by it to be terminated in a manner which would
result in the imposition of a lien on any property of the Company pursuant to
Section 4068 of the Employee Retirement Income security Act of 1974, as amended.

     Section 3.06.  No bonds owned or held by, for the account of or for the
benefit of the Company or any other obligor on the bonds (other than bonds
pledged to secure an obligation) shall be deemed entitled to share in any
payment or distribution provided in Article Sixth of the Indenture, provided
that the Trustee shall be protected in making any such payment or distribution
unless it shall have actual knowledge that the bonds in respect of which such
payment or distribution is made are so owned or held.

     Section 3.07.  Payments of any amounts with respect to the series S bonds
shall be made at such place and in such manner as shall be provided in  6.4 of
the Bond Purchase Agreement dated as of April 1, 1998 (the "Bond Purchase
Agreement"), between the Company and the original purchaser of said Series S
bonds, or at such other places and in such other manners as may, from time to
time, be agreed upon in writing among the Company, the Trustee and the holder of
the Series S bond in question.

     Section 3.08.  Anything contained elsewhere in the Indenture
notwithstanding, and without limiting the effect of Section 3.15 of this
Nineteenth Supplemental Indenture, so long as any of the Series S bonds shall
remain outstanding, the Trustee shall be entitled to exercise any of the
remedies provided in the Indenture (including, without limitation, the remedies
provided in Sections 33, 46, 47, 48 and 49 of Indenture):
 
          (a)  if the Company shall default in the payment of any interest
     payable on any Series S bonds and such default shall have continued for a
     period of ten days, or the Company shall default in the payment of
     principal on any Series S bonds at final maturity or at any date fixed for
     the optional redemption thereof pursuant to the provisions of Section 1.03
     of this Nineteenth Supplemental Indenture or at any date fixed for
     redemption thereof pursuant to the provisions of Section 1.05 of this
     Nineteenth Supplemental Indenture;

          (b)  if the Company or any subsidiary of the Company shall fail to
     make when due or payable (including applicable grace periods, if any) any
     payment required to be made by it in respect of any indebtedness (other
     than the Series S bonds), the outstanding aggregate principal amount of
     which indebtedness is at the time of such failure in excess of three
     million dollars ($3,000,000);

          (c)  if the Company shall fail in the observance or performance of any
     other convenant, condition or agreement not enumerated in this Section
     herein above, contained in the Indenture (including this Nineteenth
     Supplemental Indenture) or in the Bond Purchase Agreement, and such failure
     shall continue for a period of sixty (60) days after such failure shall
     first become known to the President or the Financial

                                      -15-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

     Vice President of the Company, or to any person charged with the
     responsibilities normally associated with either of such offices;

          (d)  if any representation or warranty made by the Company herein, or
     made by the Company in the Bond Purchase Agreement, or made by the Company
     in any statement or certificate furnished by the Company in connection with
     the consummation of the issuance and delivery of the Series S bonds or
     furnished by the Company pursuant hereto or pursuant to the Bond Purchase
     Agreement, is untrue in any material respect as of the date of the issuance
     or making thereof;

          (e)  if final judgment or judgments for the payment of money
     aggregating in excess of $100,000 is or are outstanding against the Company
     or against any property or assets of the Company and any one of such
     judgments has remained unpaid, unvacated, unbonded or unstayed by appeal or
     otherwise for a period of 30 days from the date of its entry;

          (f)  in the event of the entry of a decree or order by a court having
     jurisdiction in the premises adjudging the Company a bankrupt or insolvent,
     or approving as properly filed a petition seeking reorganization,
     arrangement, adjustment or composition of, or in respect of, the Company
     under applicable Federal bankruptcy law or any other applicable Federal or
     State law, or appointing a receiver, liquidator, assignee, trustee,
     sequestrator (or other similar official) or the Company or of any
     substantial part of its property, or ordering the winding up or liquidation
     of its affairs, and the continuance of any such decree or order unstayed an
     in effect for a period of 60 consecutive days; or

          (g)  in the event of the institution by the Company of proceedings to
     be adjudicated a bankrupt or insolvent, or the consent by it to the
     institution of bankruptcy or insolvency proceedings against it, or the
     filing by it of a petition or answer or consent seeking reorganization or
     relief under applicable Federal bankruptcy law or any other similar
     applicable Federal or State law, or the consent by it to the filing of any
     such petition or the appointment of a receiver, liquidator, assignee,
     trustee, sequestrator (or other similar official) of the Company or of any
     substantial part of its property, or the making by it of an assignment for
     the benefit of creditors, or the admission by it in writing of its
     inability to pay its debts generally as they become due, or the taking of
     corporate action by the Company in furtherance of any such action.

     Section 3.09.  This Nineteenth Supplemental Indenture shall become void
when the Original Indenture shall be void.

     Section 3.10.  Dates of supplemental indentures and of bonds are intended
as and for dates for the identification of such bonds and such instruments,
respectively, and are not intended to indicate that any such instrument or any
bond was and no such instrument or bond has been or is to be executed on a
Sunday or a legal holiday, the respective dates when supplemental indentures
were executed being the dates or respective dates of the acknowledgments of the
parties thereto.

                                      -16-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

     Section 3.11.  Whenever reference is made in this Nineteenth Supplemental
Indenture to a Section or an Article of the Original Indenture and such Section
or Article has been amended by this instrument or any of the indentures
supplemental to the Original Indenture enumerated herein above, or two or more
of them, then such reference shall be to such Section or Article as so amended,
whether or not herein expressly so stated.

     Section 3.12.  The Company, at its own cost and expense, will forthwith,
upon the execution and delivery by the parties hereto of this Nineteenth
Supplemental Indenture, cause the same to be recorded pursuant to law in all
offices for the recording of mortgages of real or personal property in which
such recordation is necessary in order to perfect and protect the lien hereof,
and, in any event, in all such offices in which it has caused or may cause the
Original Indenture to be recorded.

     Section 3.13.  Anything in the Series S bonds or in the Indenture to the
contrary notwithstanding, upon receipt by the Company or the Trustee of evidence
reasonably satisfactory to the Company or the Trustee of the ownership of and
loss, theft, destruction or mutilation of any Series S bond and (a) in the case
of loss, theft or destruction, of indemnity or security reasonably satisfactory
to it (provided, however, that if the holder of such Series S bond is an
institution having a minimum net worth of $10,000,000 or more, its own affidavit
and undertaking of indemnity shall be deemed to be satisfactory evidence,
indemnity, and security) or (b) in the case of mutilation, upon surrender and
cancellation thereof, the Company at its expense will execute, and thereupon the
Trustee will authenticate and deliver in lieu thereof, a new bond, executed and
authenticated in the same manner as the bond being replaced, in an aggregate
principal amount equal to the unpaid portion of the principal amount of the bond
being replaced.

     Section 3.14.  This Nineteenth Supplemental Indenture may be executed in
any number of counterparts, each of which shall be deemed an original; and such
counterparts shall constitute but one and the same instrument, which shall for
all purposes be sufficiently evidenced by any such original counterpart.

     Section 3.15.  For any default by the Company in the covenants,
stipulations, promises and agreements herein contained or contained in the bonds
of Series S, the Trustee and the bondholders shall have the same rights and
remedies, subject to the same limitations, as are provided in the Original
Indenture.

     Section 3.16.  The Company hereby agrees to unconditionally indemnify,
defend and hold, and covenants not to sue, the Trustee and each holder of the
bonds of Series S from time to time, their respective directors, officers,
employees and agents harmless for or against any loss, liability, damage,
expense or claim (including, but not limited to, reasonable fees of attorneys,
experts and professionals and reasonable environmental consulting fees and
sampling and analysis costs which are incurred in investigating such claims,
defending such claims and prosecuting the Company under the indemnity provided
by this Section 3.16, whether arising under the federal Comprehensive
Environmental Response, Compensation and Liability Act, 42 U.S.C. Sections 9601
et seq., the federal Resource Conservation and Recovery Act, 42 U.S.C. Sections
6901 et seq., or any similar state law or regulation providing for liability for
responding to a release of hazardous substances (the

                                      -17-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

"Environmental Laws") (excepting only those attributable solely and completely
to the willful misconduct of any holder or holders of the bonds of Series S))
which may be incurred by or asserted against any holder of the bonds of Series S
directly or indirectly arising or resulting from, or relating to, any of the
following:  (1) the presence of any Hazardous Substances (hereinafter defined)
on any property previously, presently or hereafter owned, possessed, occupied,
operated or utilized by the Company; (2) the presence of any Hazardous
Substances on any real property, not previously, presently hereafter owned,
possessed, occupied or operated by the Company, which Hazardous Substances were
used, generated, manufactured, produced, stored, transported, disposed,
released, discharged, abandoned or handled by the Company; and (3) the violation
by the Company of any Environmental Law.  This indemnity shall continue in full
force and effect after repayment of the bonds of Series S, and its duration
shall be forever.

     "Hazardous Substance" shall mean any hazardous or toxic material, substance
or waste, pollutant or contaminant which is regulated under any statute, law,
ordinance, rule or regulation of any local, state, regional or federal authority
having jurisdiction over the property of the Company or its use, including but
not limited to any material, substance or waste which is: (a) defined as a
hazardous substance under Section 311 of the Federal Water Pollution Control Act
(33 U.S.C. 1317) as amended; (b) regulated as a hazardous waste under Section
1004 or Section 3001 of the Federal Solid Waste Disposal Act, as amended by the
Resource Conservation and Recovery Action (42 U.S.C. 6901 et seq.), as amended,
(c) defined as hazardous substance under Section 101 of the Comprehensive
Environmental Response, Compensation and Liability Act (42 U.S.C. 960 et seq.),
as amended or (d) defined or regulated as a hazardous substance or hazardous
waste under any rules or regulations promulgated under any of the foregoing
statutes.

                                      -18-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture

     IN WITNESS WHEREOF, The Providence Gas Company has caused its corporate
seal to be hereto affixed and these presents to be executed, acknowledged and
delivered in its name and on its behalf by its Senior Vice President and the
Assistant Treasurer, and said State Street Bank and Trust Company, as successor
as Trustee to Rhode Island Hospital Trust National Bank, which succeeded Rhode
Island Hospital Trust Company, has caused its corporate seal to be hereto
affixed and these presents to be executed and delivered by one of its officers,
all hereunto duly authorized, as of the day and year first above written.

                                            THE PROVIDENCE GAS COMPANY

(CORPORATE SEAL)                              By    /s/ James DeMetro
                                                 -------------------------
                                                        James DeMetro           
                                                 Its Senior Vice President      
                                                                                
                                                                                
                                              By     /s/ Peter J. Gill          
                                                  -----------------------       
                                                        Peter J. Gill
                                                  Its Assistant Treasurer

Signed, sealed and delivered
in the presence of:

/s/ Witness
- ------------------------
as to The Providence Gas
    Company

                                            STATE STREET BANK AND TRUST COMPANY,
                                             Trustee

 
[CORPORATE SEAL]
                                              By     /s/ Gary Dougherty        
                                                --------------------------
                                                     Authorized Officer

Signed, sealed and delivered
in the present of:

/s/ Witness
- ---------------------------
as to State Street Bank and
    Trust Company

                                      -19-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture


STATE OF RHODE ISLAND   )
                       ):SS.:
COUNTY OF PROVIDENCE    )

     In Providence, this 6th day of April A.D. 1998, personally appeared before
me James DeMetro, to me known and known by me to be a Senior Vice President of
THE PROVIDENCE GAS COMPANY, one of the parties that executed the foregoing
instrument, and acknowledged said instrument to be his free act and deed in his
capacity, and the free act and deed of said corporation; and on oath stated that
hew ad duly authorized to execute said instrument and that the seal affixed
thereto is the corporate seal of said corporation.

     IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal, the day and year first above written.


                                                  /s/ Eleanore F. Gaines    
                                                  ----------------------
                                                       Notary Public

My Commission Expires: 7/14/2001
                                                    [Notarial Seal]

STATE OF RHODE ISLAND  )
                      ):SS.:
COUNTY OF PROVIDENCE  )

     In Providence, this 6th day of April A.D. 1998, personally appeared before
me Peter J. Gill, to me known and known by me to be an Assistant Treasurer of
THE PROVIDENCE GAS COMPANY, one of the parties that executed the foregoing
instrument, and acknowledged said instrument to be his free act and deed in his
said capacity; and the free act and deed of said corporation; and on oath stated
that he was duly authorized to execute said instrument and that the seal affixed
thereto is the corporate seal of said corporation.

     IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal, the day and year first above written.

                                                      /s/ Anne W. Connor
                                                ------------------------------
                                                         Notary Public

My Commission Expires: 12/23/2001

                                                  [Notarial Seal]

                                      -20-
<PAGE>
 
The Providence Gas Company                     Nineteenth Supplemental Indenture



STATE OF RHODE ISLAND  )
                      ):SS.:
COUNTY OF PROVIDENCE   )

     In Providence, this 6th day of April A. D. 1998, personally appeared before
me Gary Doughery, to me known and known by me to be an Assistant Vice President
of STATE STREET BANK AND TRUST, one of the parties that executed the foregoing
instrument, and acknowledged said instrument to be his free act and deed in his
said capacity, and the free act and deed of said corporation; and on oath stated
that he was duly authorized to execute said instrument and that the seal affixed
thereto is the corporate seal of said corporation.

     IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official
seal, the day and year first above written.


                                                   /s/ Jacqueline G. Maynard
                                                  ---------------------------
                                                         Notary Public

                                                  [Notarial Seal]

My Commission Expires: 6/25/2001

                                      -21-
<PAGE>
 
                   SCHEDULE OF PROPERTY AND INTEREST THEREIN

     The following described tracts or parcels of land with all buildings and
improvements thereon and therein, situated in the County of Providence, in said
State of Rhode Island:

FIRST PARCEL:

     Situated on the northerly side of Goff Street, in the City of Providence,
bounded and described as follows:

Beginning, for the southeasterly corner of the tract hereby conveyed, at a stone
bound in the northerly line of Goff Street at the southwesterly corner of land
now or formerly of George K. Webster; thence northerly bounding easterly on said
Webster land, 77.53 feet, more or less, to land now or formerly of Sands, Taylor
& Wood; thence westerly, bounding northerly on said Sands, Taylor & Wood land,
approximately 88 feet, to the southwesterly corner of said Sands, Taylor & Wood
land; thence northerly, bounding easterly on said Sands, Taylor & Wood land, 116
feet, more or less to Blackstone Street; thence westerly bounding northerly on
said Blackstone Street, 351.05 feet, more or less to land now or formerly of
John E. Devron; thence southerly, bounding westerly in part on said Devron land,
and in part on lands now or formerly of Mary H. Baldwin, Edward Brophy and wife
and Joseph Haselden and wife, about 220.66 feet, more or less, to a stone bound;
thence westerly at a right angel to said last described line; bounding northerly
on said Haselden land, 24.38 feet to a stone bound; thence southerly, at an
interior angle of 101 degrees 21', bounding westerly on land now or formerly of
Benjamin Dubinsky, 45.29 feet, to a stone bound; thence southerly at an interior
angle of 152 degrees 42' bounding westerly on land now or formerly of the Apco
Manufacturing Company, 39.20 feet to a stone bound and said Goff Street; thence
easterly along the northerly line of said Goff Street, 498.23 feet, more or
less, to a stone bound and the place of beginning.  Being the same premises
conveyed to Providence Gas Company by deed of Oxford Land Company dated October
28, 1903, filed in Book 460, Page 197 in Providence Land Records and by deed of
Walter E., Thomas C. and Louis A. Gladding dated March 8, 1904, recorded in said
Providence Land Records in Deed Book 464, Page 113.

     Excepting from the above premises the property conveyed to Providence
Energy Company by Quiteclaim Deed of Providence Gas Company dated September 29,
1989, recorded in Deed Book 2116, Page 118, and property conveyed to Astro
Plating Works Corp. by Quitclaim Deed dated July 18, 1983, filed in Providence
Land Records in Deed Book 1246, Page 615.






                                   SCHEDULE I
                     (to Nineteenth Supplemental Indenture)

<PAGE>
 
                         SCHEDULE OF RELEASED PROPERTY



                                     None





                                  SCHEDULE II
                    (to Nineteenth Supplemental Indenture)

<PAGE>
 
                                                                      EXHIBIT 21


   Exhibit 21 - SUBSIDIARY OF REGISTRANT
   -------------------------------------

ProvEnergy Investments, Ltd. - Incorporated under the laws of Rhode Island.

<TABLE> <S> <C>

<PAGE>

<ARTICLE> UT
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-START>                             OCT-01-1997
<PERIOD-END>                               SEP-30-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                      193,633
<OTHER-PROPERTY-AND-INVEST>                          0
<TOTAL-CURRENT-ASSETS>                          19,603
<TOTAL-DEFERRED-CHARGES>                        15,378
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                                 228,614
<COMMON>                                         1,244
<CAPITAL-SURPLUS-PAID-IN>                       37,590
<RETAINED-EARNINGS>                             42,807
<TOTAL-COMMON-STOCKHOLDERS-EQ>                  81,641
                                0
                                      4,800
<LONG-TERM-DEBT-NET>                            78,021
<SHORT-TERM-NOTES>                               9,720
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                    3,050
                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                  51,382
<TOT-CAPITALIZATION-AND-LIAB>                  228,614
<GROSS-OPERATING-REVENUE>                      184,026
<INCOME-TAX-EXPENSE>                             4,342
<OTHER-OPERATING-EXPENSES>                     164,036
<TOTAL-OPERATING-EXPENSES>                     168,378
<OPERATING-INCOME-LOSS>                         15,648
<OTHER-INCOME-NET>                                 584
<INCOME-BEFORE-INTEREST-EXPEN>                  16,232
<TOTAL-INTEREST-EXPENSE>                         7,473
<NET-INCOME>                                     8,759
                        487
<EARNINGS-AVAILABLE-FOR-COMM>                    8,272
<COMMON-STOCK-DIVIDENDS>                         4,776
<TOTAL-INTEREST-ON-BONDS>                        6,362
<CASH-FLOW-OPERATIONS>                          41,426
<EPS-PRIMARY>                                     6.65
<EPS-DILUTED>                                     6.65
        

</TABLE>


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