SOUTHWEST GAS CORP
SC 13D/A, 2000-03-03
NATURAL GAS TRANSMISISON & DISTRIBUTION
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               SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C.  20549


                          SCHEDULE 13D

    Under the Securities Exchange Act of 1934 (Amendment No. 11)

                   Southwest Gas Corporation
                        (Name of Issuer)


             Common Stock Par Value $1.00 Per Share
                 (Title of Class of Securities)


                           844895102
                         (CUSIP Number)



          James E. McKee, Gabelli Asset Management Inc.,
     One Corporate Center, Rye, NY 10580-1434 (914) 921-5294
    (Name, Address and Telephone Number of Person Authorized
             to Receive Notices and Communications)


                         March 3, 2000
     (Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule
13G to report the acquisition that is the subject of this Sched-
ule 13D, and is filing this schedule because of Sections 240.13d-1(e),
240.13d-1(f) or 240.13d-1(g), check the following box [  ].



<PAGE>
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Funds, LLC            I.D. No. 13-4044523
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      OO-Funds of investment company clients
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          _____
                                                     /   /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      New York
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     896,000 (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None  (Item 5)
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     896,000 (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None  (Item 5)
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      896,000 (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         _____
                                                     /    /
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      2.90%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      IA
_________________________________________________________________
              *SEE INSTRUCTIONS BEFORE FILLING OUT!
________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      GAMCO Investors, Inc.              I.D. No. 13-2951242
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      OO-Funds of investment advisory clients
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          _____
                                                     /    /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      New York
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     2,020,483 (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     2,107,483 (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      2,107,483 (Item 5)
_________________________________________________________________

(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         ____
                                                     /___/
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      6.83%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      IA, CO
_________________________________________________________________
              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Securities, Inc.           I.D. No. 13-3379374
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      WC
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /___/
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      Delaware
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     None (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     None (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      None (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         _____
                                                     /  x /
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.00%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      HC, CO
_________________________________________________________________
              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
     Gabelli Foundation, Inc.          I.D. No. 94-2975159
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      WC
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /    /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      NV
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     11,000 (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     11,000 (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     11,000 (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         _____
                                                     /    /
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.04%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      00-PRIVATE FOUNDATION
_________________________________________________________________

              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Fund, LDC         I.D. No. Foreign Corporation
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      WC
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /___/
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      British Virgin Islands
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     2,000 (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     2,000 (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      2,000 (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         ____
                                                     /___/
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.01%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      CO
_________________________________________________________________

              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Associates Fund            I.D. No. 13-3246203
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      WC
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /___/
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      New York
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     38,400 (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     38,400 (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      38,400 (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         ____
                                                     /___/
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.12%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      PN
_________________________________________________________________

              *SEE INSTRUCTIONS BEFORE FILLING OUT!
________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Associates Limited     I.D. No. Foreign Corporation
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      WC
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /___/
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      British Virgin Islands
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     23,000 (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     23,000 (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     23,000 (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         ____
                                                     /___/
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.07%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      CO
_________________________________________________________________

              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Group Capital Partners, Inc.   I.D. No. 13-3056041
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      None
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          _____
                                                     /    /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      New York
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     None (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None  (Item 5)
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     None (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None  (Item 5)
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      None (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         _____
                                                     /  x /
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.00%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      HC, CO
_________________________________________________________________
              *SEE INSTRUCTIONS BEFORE FILLING OUT!
________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
      Gabelli Asset Management Inc.       I.D. No. 13-4007862
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      None
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          _____
                                                     /    /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      New York
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     None (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
PERSON WITH                             : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     None (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      None (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         ____
                                                     /_x__/
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.00%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      HC, CO
_________________________________________________________________
              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
     Marc J. Gabelli
 ________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      None
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /    /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      USA
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     None   (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     None   (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     None   (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         _____
                                                     /    /
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.00%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      IN
_________________________________________________________________

              *SEE INSTRUCTIONS BEFORE FILLING OUT!
_________________________________________________________________

CUSIP No. 844895102                                        13D
_________________________________________________________________
(1)  NAMES OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS
     Mario J. Gabelli
_________________________________________________________________
(2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                       ____
                                                  (a) /___/
                                                       ____
                                                  (b) /___/
_________________________________________________________________
(3)  SEC USE ONLY
_________________________________________________________________
(4)  SOURCE OF FUNDS*
      None
_________________________________________________________________
(5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)          ____
                                                     /    /
_________________________________________________________________
(6)  CITIZENSHIP OR PLACE OF ORGANIZATION
      USA
_________________________________________________________________
                                        : (7) SOLE VOTING POWER
                                        :     None   (Item 5)
                                        :________________________
                                        : (8) SHARED VOTING POWER
 NUMBER OF SHARES BENEFICIALLY          :     None
 OWNED BY EACH REPORTING                :________________________
 PERSON WITH                            : (9) SOLE DISPOSITIVE
                                        :     POWER
                                        :     None   (Item 5)
                                        :________________________
                                        :(10) SHARED DISPOSITIVE
                                        :     POWER
                                        :     None
_________________________________________________________________
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     None   (Item 5)
_________________________________________________________________
(12) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11
     EXCLUDES CERTAIN SHARES*                         _____
                                                     /  x /
_________________________________________________________________
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
      0.00%
_________________________________________________________________
(14) TYPE OF REPORTING PERSON*
      IN
_________________________________________________________________

              *SEE INSTRUCTIONS BEFORE FILLING OUT!
Item 1.   Security and Issuer
          This Amendment No. 11 to Schedule 13D on the Common Stock of
Southwest Gas Corporation (the "Issuer") is being filed on behalf of the
undersigned to amend the Schedule 13D, as amended (the "Schedule 13D")
which was originally filed on February 7, 1997.  Unless otherwise
indicated, all capitalized terms used herein but not defined herein
shall have the same meaning as set forth in the Schedule 13D.

Item 2.   Identity and Background
          This statement is being filed by Mario J. Gabelli ("Mario
Gabelli"), Marc J. Gabelli ("Marc Gabelli") and various entities which
either one directly or indirectly controls or for which either one acts
as chief investment officer.  These entities, except for Lynch Corpora-
tion ("Lynch"), Spinnaker Industries, Incorporated ("Spinnaker"),
Western New Mexico Telephone Company ("Western New Mexico"), Entoleter,
Inc. ("Entoleter"),  Lynch Telecommunications Corporation ("Lynch
Telecom"), Lynch Telephone Corporation ("Lynch Telephone") and Inter-
Community Telephone Company ("Inter-Community") (collectively, "Lynch
and its affiliates"), engage in various aspects of the securities
business, primarily as investment adviser to various institutional and
individual clients, including registered investment companies and
pension plans, as broker/dealer and as general partner of various
private investment partnerships.  Certain of these entities may also
make investments for their own accounts.
          The foregoing persons in the aggregate often own beneficially
more than 5% of a class of equity securities of a particular issuer.
Although several of the foregoing persons are treated as institutional
investors for purposes of reporting their beneficial ownership on the
short-form Schedule 13G, the holdings of those who do not qualify as
institutional investors may exceed the 1% threshold presented for filing
on Schedule 13G or implementation of their investment philosophy may
from time to time require action which could be viewed as not completely
passive.  In order to avoid any question as to whether their beneficial
ownership is being reported on the proper form and in order to provide
greater investment flexibility and administrative uniformity, these
persons  have decided to file their beneficial ownership reports on the
more detailed Schedule 13D form rather than on the short-form Schedule
13G and thereby to provide more expansive disclosure than may be
necessary.
          (a), (b) and (c) - This statement is being filed by one or
more of the following persons: Gabelli Group Capital Partners, Inc.
("Gabelli Partners"), Gabelli Asset Management Inc.
("GAMI") , Gabelli Funds, LLC ("Gabelli Funds"),  GAMCO Investors, Inc.
("GAMCO"), Gabelli Securities, Inc. ("GSI"), Gabelli & Company, Inc.
("Gabelli & Company"), Gabelli Performance Partnership L.P. ("GPP"),
GLI, Inc. ("GLI"), Gabelli Associates Fund ("Gabelli Associates"),
Gabelli Associates Limited ("GAL"), Gabelli & Company, Inc. Profit
Sharing Plan (the "Plan"), Gabelli International Limited ("GIL"),
Gabelli International II Limited ("GIL II"), Gabelli International Gold
Fund Limited ("GIGFL"), ALCE Partners, L.P. ("ALCE"), Gabelli Multimedia
Partners, L.P. ("Multimedia Partners"), MJG Associates, Inc. ("MJG
Assocciates"), Gemini Capital Management Ltd. ("Gemini"), Gabelli Fund,
LDC ("LDC"), Gabelli Foundation, Inc. ("Foundation"), Gabelli Global
Partners, Ltd. ("GGP Ltd."), Gabelli Global Partners, L.P. ("GGP L.P."),
Mario Gabelli, Marc Gabelli, Lynch, Spinnaker, Western New Mexico,
Entoleter, Lynch Telecom, Lynch Telephone and Inter-Community. Those of
the foregoing persons signing this Schedule 13D are hereafter referred
to as the "Reporting Persons".
          Gabelli Partners makes investments for its own account and is
the parent company of GAMI. GAMI, a public company listed on the New
York Stock Exchange, is the parent company for a variety of companies
engaged in the securities business, each of which is named below.
          GAMCO, a wholly-owned subsidiary of GAMI, is an investment
adviser registered under the Investment Advisers Act of 1940, as amended
("Advisers Act").  GAMCO is an investment manager providing discretion-
ary managed account services for employee benefit plans, private
investors, endowments, foundations and others.
          GSI, a majority-owned subsidiary of GAMI, acts as a general
partner or investment manager to limited partnerships and offshore
investment companies and as a part of its business regularly purchases
and sells securities for its own account.  It is the immediate parent of
Gabelli & Company.
          Gabelli & Company, a wholly-owned subsidiary of GSI, is a
broker-dealer registered under the Securities Exchange Act of 1934, as
amended ("l934 Act"), which as a part of its business regularly
purchases and sells securities for its own account.
          GLI, wholly-owned subsidiary of GSI, is a corporation which
currently has no active operations.
          Gabelli Associates is a New York limited partnership whose
primary business purpose is risk arbitrage investments.  GSI and Mario
Gabelli are the general partners of Gabelli Associates.
          GAL is a corporation whose primary business purpose is risk
arbitrage investments.  Shares of GAL's common stock are offered to
persons who are neither citizens nor residents of the United States and
may be offered to a limited number of U.S. investors.  GSI is the
investment manager of GAL.
          Gabelli Funds, a wholly-owned subsidiary of GAMI, is a limited
liability company. Gabelli Funds is an investment adviser registered
under the Advisers Act which presently provides discretionary advisory
services to The Gabelli Equity Trust Inc., The Gabelli Asset Fund, The
Gabelli Growth Fund, The Gabelli Convertible Securities Fund, Inc., The
Gabelli Value Fund Inc., The Gabelli Small Cap Growth Fund, The Gabelli
Equity Income Fund, The Gabelli ABC Fund, The Gabelli Global Telecommu-
nications Fund, Gabelli Gold Fund, Inc., The Gabelli Global Multimedia
Trust Inc., The Gabelli Global Convertible Securities Fund, Gabelli
Capital Asset Fund, Gabelli International Growth Fund, Inc., The Gabelli
Global Interactive Couch Potato Fund, The Gabelli Utility Trust and The
Gabelli Global Opportunity Fund (collectively, the "Funds"), which are
registered investment companies.
          Gabelli Advisers, Inc. ("Gabelli Advisers"), a subsidiary of
GAMI, is an investment adviser which provides discretionary advisory
services to The Gabelli Westwood Mighty Mitessm Fund.
          The Plan, a qualified employee profit sharing plan, covers
substantially all employees of GAMI and its affiliates.
          GPP is a limited partnership whose primary business purpose is
investing in securities.  MJG Associates is the general partner of GPP,
and Mario Gabelli is a portfolio manager for GPP.
          GIL is a corporation whose primary business purpose is
investing in a portfolio of equity securities and securities convertible
into, or exchangeable for, equity securities in order to achieve its in-
vestment objective of significant long-term growth of capital.  Shares
of GIL's common stock are offered to persons who are neither citizens
nor residents of the United States and may be offered to a limited
number of U.S. investors.  MJG Associates is the Investment Manager of
GIL.  Mario Gabelli is a portfolio manager for GIL and Chairman of the
Board of Directors of GIL.
          GIL II is a corporation whose business purpose is investing
primarily in a portfolio of equity securities and securities convertible
into, or exchangeable for, equity securities in order to achieve its in-
vestment objective of significant long-term growth of capital.  Shares
of GIL II's common stock are offered to persons who are neither citizens
nor residents of the United States and may be offered to a limited
number of U.S. investors.   MJG Associates is the Investment Manager of
GIL II. Mario Gabelli is a portfolio manager and Chairman of the Board
of Directors of GIL II.
       ALCE is an investment limited partnership that seeks long-term
capital appreciation primarily through investments in public and private
equity securities.  GSI is a general partner of ALCE.
       Multimedia Partners is an investment limited partnership whose
objective is to provide long-term capital appreciation by investing
primarily in public and private multimedia communications companies.
GSI is a general partner of Multimedia Partners.
       GGP L.P. is a partnership whose primary business purpose is
investing in Securities on a global basis.  Gabelli Securities, Inc. and
Gemini Capital Management, LLC are the general partners of GGP L.P. and
Marc Gabelli is a portfolio manager for GGP L.P.
       GGP Ltd. is a corporation whose primary business purpose is
investing in Securities on a global basis.  Gabelli Securities,
International Limited and Gemini Capital Management, LLC are the
investment advisors of GGP Ltd. and Marc Gabelli is the portfolio
manager for GGP Ltd.
       LDC is a corporation whose business purpose is investing
primarily in a portfolio of equity securities and securities convertible
into, or exchangeable for, equity securities in order to achieve its
investment objective of significant long-term growth of capital.
Interests are offered to insurance companies which do not conduct any
business in the United States and which are licensed where they do
business.  MJG Associates is the Investment Manager of LDC.  Mario
Gabelli is a portfolio manager for LDC.
       MJG Associates provides advisory services to private investment
partnerships and offshore funds.  Mario  Gabelli is the sole sharehold-
er, director and employee of MJG Associates.
       Gemini is a corporation whose primary business purpose is to
provide advisory services to offshore funds.  Marc Gabelli is the
President and Chief Investment Officer of Gemini.
       The Foundation is a private foundation. Mario Gabelli is the
President, a Trustee and the Investment Manager of the Foundation.
       Lynch is a diversified public company traded on the American
Stock Exchange.  Its subsidiaries are engaged in communications,
services, and manufactured products.  Spinnaker, a subsidiary of Lynch,
is also a public company and its stock is traded on the NASDAQ National
Market.  Spinnaker is a diversified manufacturing firm with major
subsidiaries in specialty adhesive-backed materials business.  Another
of Lynch's subsidiaries, Western New Mexico, provides telephone services
in a service area in Southwestern New Mexico.  Inter-Community, which is
also a subsidiary of Lynch, provides local telephone services in an area
40 miles west of Fargo, North Dakota.   Lynch and Spinnaker actively
pursue new business ventures and acquisitions.  Lynch and its affiliates
make investments in marketable securities to preserve capital and
maintain liquidity for financing their business activities and acquisi-
tions (not in the case of Western New Mexico) and are not engaged in the
business of investing, reinvesting, or trading in securities.  Mario
Gabelli is Chairman of Lynch and beneficially owns approximately 23% of
the shares of common stock of Lynch.
          Mario Gabelli is the majority stockholder and Chairman of the
Board of Directors and Chief Executive Officer of Gabelli Partners and
GAMI, and the Chief Investment Officer for each of the Reporting Persons
which are entities other than Gemini.  Gabelli Partners is the majority
shareholder of GAMI. GAMI, in turn, is the sole stockholder of GAMCO.
GAMI is also the majority stockholder of GSI and the largest shareholder
of Gabelli Advisers.  Gabelli & Company is a wholly-owned subsidiary of
GSI.  GLI is a wholly-owned subsidiary of GSI.  Marc Gabelli is the
majority stockholder of Gemini.
          The Reporting Persons do not admit that they constitute a
group.
          Gabelli Partners, GAMI, GAMCO, Gabelli & Company and GLI are
New York corporations and GSI and Gabelli Advisers are Delaware
corporations, each having its principal business office at One Corporate
Center, Rye, New York 10580.  Gabelli Funds is a New York limited
liability company having its principal business office at One Corporate
Center, Rye, New York 10580. GPP is a New York limited partnership
having its principal business office at 401 Theodore Fremd Ave., Rye,
New York 10580.  MJG Associates is a Connecticut corporation having its
principal business office at 401 Theodore Fremd Ave., Rye, New York
10580. Gabelli Associates is a New York limited partnership having its
principal business office at One Corporate Center, Rye, New York 10580.
Alce and Multimedia Partners and GGP L.P. are Delaware limited partner-
ships each having its principal business office at One Corporate Center,
Rye, New York 10580. GAL and GIL are corporations organized under the
laws of the British Virgin Islands, and GGP Ltd. is a corporation
organized under the laws of the Cayman Islands, each having its
principal business office at c/o MeesPierson (Cayman) Limited, British
American Centre, Dr. Roy's Drive-Phase 3, George Town, Grand Cayman,
British West Indies.  GIL II is a corporation organized under the laws
of the British Virgin Islands having its principal business office at
c/o Coutts & Company (Cayman) Limited, West Bay Road, Grand Cayman,
British West Indies.  Gemini is a Bermuda corporation having its
principal business office at c/o Appleby, Spurling & Kempe, Cedar House,
41 Cedar Avenue, Hamilton HM12, Bermuda.  LDC is a corporation organized
under the laws of the British Virgin Islands having its pricipal
business office at c/o Tremont (Bermuda) Limited, Tremont House, 4 Park
Road, Hamilton HM II, Bermuda. The Foundation is a private foundation
having its principal offices at 165 West Liberty Street, Reno, Nevada
89501. Lynch is an Indiana corporation having its principal business
office at 401 Theodore Fremd Avenue, Rye, NY 10580.  Spinnaker is a
Delaware corporation having its principal business office at 251 Welton
Street, Hamden, CT 06511.
          For information required by instruction C to Schedule 13D with
respect to the executive officers and directors of the foregoing
entities and other related persons (collectively, "Covered Persons"),
reference is made to Schedule I annexed hereto and incorporated herein
by reference.
     (f) - Reference is made to Schedule I hereto.

Item 3.   Source and Amount of Funds or Other Consideration
          Item 3 to Schedule 13D is amended, in pertinent part, as
follows:
          All Reporting Persons used an aggregate of approximately
$547,298 to purchase the additional Securities reported as beneficially
owned in Item 5 below since the most recent filing on Schedule 13D.
GAMCO and Gabelli Funds used approximately $512,323 and $34,975,
respectively, of funds that were provided through the accounts of
certain of their investment advisory clients (and, in the case of some
of such accounts at GAMCO, may be through borrowings from client margin
accounts) in order to purchase the additional Securities for such
clients.
Item 4.   Purpose of Transaction
          Item 4 to Schedule 13D is amended, in pertinent part, as
follows:
          On March 3, 2000, GAMCO notified the Issuer that GAMCO
currently intends to nominate at least six individuals as directors for
election at the Issuer's next annual meeting and that GAMCO intends to
cumulate its votes at the meeting with respect to the election of
directors. GAMCO also stated that its nominees will include Messrs. Mark
M. Feldman and Michael J. Melarkey who have agreed to serve as directors
if elected.
Item 5.   Interest In Securities Of The Issuer
          Item 5 to Schedule 13D is amended, in pertinent part, as
follows:
          (a)  The aggregate number and percentage of Securities to
which this Schedule 13D relates is 3,077,883 shares, representing 9.97%
of the 30,869,370 shares outstanding as reported in the Issuer's most
recently filed Form 10-Q for the quarter ended September 30, 1999.  The
Reporting Persons beneficially own those Securities as follows:


                              Shares of           % of
                              Common              Class of
Name                          Stock               Common

Gabelli Funds:
  As Principal                       0                0.00%
  As Agent                     896,000                2.90%




GAMCO:
  As Principal                       0                0.00%
  As Agent                   2,107,483                6.83%

GSI                                  0                0.00%

LDC                              2,000                0.01%

GAF                             38,400                0.12%

GAL                             23,000                0.07%

Foundation                      11,000                0.04%

Marc Gabelli                         0                0.00%

Mario Gabelli                        0                0.00%


          Mario Gabelli is deemed to have beneficial ownership of the
Securities beneficially owned by each of the foregoing persons other
than Marc Gabelli. GSI is deemed to have beneficial ownership of the
Securities beneficially owned by GAF and GAL. Gabelli Partners and GAMI
are deemed to have beneficial ownership of the Securities beneficially
owned by each of the foregoing persons other than Mario Gabelli, Marc
Gabelli and the Foundation.
          (b) Each of the Reporting Persons and Covered Persons has the
sole power to vote or direct the vote and sole power to dispose or to
direct the disposition of the Securities reported for it, either for its
own benefit or for the benefit of its investment clients or its
partners, as the case may be, except that (i) GAMCO does not have
authority to vote 87,000 of the reported shares, (ii) Gabelli Funds has
sole dispositive and voting power with respect to the shares of the
Issuer held by the the Funds, so long as the aggregate voting interest
of all joint filers does not exceed 25% of their total voting interest
in the Issuer and in that event, the Proxy Voting Committee of each of
the Funds shall respectively vote that Fund's shares, (iii) at any time,
the Proxy Voting Committee of each such Fund may take and exercise in
its sole discretion the entire voting power with respect to the shares
held by such Fund under special circumstances such as regulatory
considerations, (iv) the power of Mario Gabelli, Marc Gabelli, Gabelli
Partners and GAMI is indirect with respect to Securities beneficially
owned directly by other Reporting Persons.
          (c) Information with respect to all transactions in the
Securities which were effected during the past sixty days or since the
most recent filing on Schedule 13D, whichever is less, by each of the
Reporting Persons and Covered Persons is set forth on Schedule II
annexed hereto and incorporated herein by reference.














Signature
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true,
complete and correct.
Dated:    March 3, 2000
                                   MARIO J. GABELLI


                                   By:_____________________________
                                      James E. McKee
                                      Attorney-in-Fact


                                   GABELLI FUNDS, LLC


                                   By:_________________________
                                      James E. McKee
                                      Secretary

                                   GABELLI GROUP CAPITAL PARTNERS, INC.


                                   By:________________________
                                      James E. McKee
                                      General Counsel


                                   GAMCO INVESTORS, INC.


                                   By:_________________________
                                      Douglas R. Jamieson
                                      Executive Vice President


                                   GABELLI ASSET MANAGEMENT INC.



                                   By:___________________________
                                      James E. McKee
                                      General Counsel





                                   GABELLI ASSOCIATES FUND


                                   By:__________________________
                                      Gabelli Securities, Inc.
                                      General Partner
                                      by: James E. McKee
                                          Secretary

                                   GABELLI ASSOCIATES LIMITED



                                   By:___________________________
                                      Gabelli Securities, Inc.
                                      Investment Manager
                                      by: James E. McKee
                                          Secretary

                                   GABELLI FUND, LDC


                                   By:_____________________________
                                      MJG Associates, Inc.
                                      Investment Manager
                                      by: Mario J. Gabelli
                                          President
                                      by: James E. McKee
                                          Attorney-in-Fact


                                   GABELLI SECURITIES INC.


                                   By:________________________
                                      James E. McKee
                                      Secretary


                                   GABELLI FOUNDATION, INC.


                                   BY:__________________________
                                      Mario J. Gabelli, President
                                      By: James E. McKee
                                      Attorney-in-Fact






Schedule I


              Information with Respect to Executive
            Officers and Directors of the Undersigned

          Schedule I to Schedule 13D is amended, in pertinent part, as
follows:
          The following sets forth as to each of the executive officers
and directors of the undersigned: his name; his business address; and
his present principal occupation or employment and the name, principal
business and address of any corporation or other organization in which
such employment is conducted.  Unless otherwise specified, the principal
employer of each such individual is Gabelli Group Capital Partners,
Inc., Gabelli Asset Management Inc., Gabelli Funds, LLC, Gabelli &
Company, Inc., or GAMCO Investors, Inc., the business address of each of
which is One Corporate Center, Rye, New York 10580, and each such
individual identified below is a citizen of the United States.  To the
knowledge of the undersigned, during the last five years, no such person
has been convicted in a criminal proceeding (excluding traffic viola-
tions or similar misdemeanors), and no such person was a party to a
civil proceeding of a judicial or administrative body of competent
jurisdiction as a result of which he was or is subject to a judgment,
decree or final order enjoining future violations of, or prohibiting or
mandating activities subject to, federal or state securities law or
finding any violation with respect to such laws except as reported in
Item 2(d) of this Schedule 13D.


<PAGE>
Gabelli Group Capital Partners, Inc.

Directors:

     Mario J. Gabelli*

     Richard B. Black              President and Director of
                                   Oak Technology, Inc.;
                                   Chairman ECRM; Director
                                   of The Morgan Group, Inc.;
                                   General Partner of KBA Part-
                                   ners, Parker Plaza
                                   400 Kelby Street,
                                   Fort Lee, NJ 07029

     Charles C. Baum               Chairman, Director and Chief Execu-
                                   tive Officer of The Morgan Group,
                                   Inc.; Secretary & Treasurer
                                   United Holdings
                                   2545 Wilkens Avenue
                                   Baltimore, MD  21223


     Dr. Eamon M. Kelly            Professor
                                   Payson Center for International
                                   Development Technology Transfer
                                   Tulane University
                                   300 Hebert Hall
                                   6823 St. Charles Avenue
                                   New Orleans, LA  70118

     Marc J. Gabelli               Managing Director

     Matthew R. Gabelli            Vice President-Trading
                                   Gabelli & Company
                                   One Corporate Center
                                   Rye, New York 10580
Officers:

     Mario J. Gabelli              Chairman, Chief Executive
                                   Officer and Chief Investment
                                   Officer

     Stephen G. Bondi              Executive Vice President-Finance
                                   and Administration
_____________________

     *    Mr. Gabelli is the Chief Executive Officer and Chief Invest-
ment Officer of Gabelli Group Capital Partners, Inc., Gabelli Asset
Management Inc. and GAMCO Investors, Inc.; Director/Trustee of all
registered investment companies advised by Gabelli Funds, LLC; Chairman
and Chief Executive Officer of Lynch Corporation; Director of East/West
Communications, Inc. 
<PAGE>
Robert S. ZuccaroVice President and Chief Financial
                                   Officer

     James E. McKee                Vice President, General
                                   Counsel and Secretary

Gabelli Asset Management Inc.

Directors:

     Raymond C. Avansino, Jr.      Chairman
                                   E.L. Wiegand Foundation
                                   165 West Liberty Streeet
                                   Reno, NV 89501

     Mario J. Gabelli              See above


     John C. Ferrara               Chief Financial Officer
                                   Space.Com
                                   120 West 45th Street
                                   New York, New York 10036
     Dr. Eamon M. Kelly            See above

     Karl Otto Pohl (1)            Sal Oppenheim Jr. & Cie
                                   Bockenheimer Landstrasse 20
                                   D-6000 FRANKFURT AM MAIN
                                   Germany

Officers:

     Mario J. Gabelli              Chairman, Chief Executive
                                   Officer and Chief Investment
                                   Officer

     Robert S. Zuccaro             Vice President and Chief Financial
                                   Officer

     James E. McKee                Vice President, General
                                   Counsel and Secretary

GAMCO Investors, Inc.

Directors:

     Mario J. Gabelli
     Douglas R. Jamieson
     Joseph R. Rindler, Jr.
     Regina M. Pitaro
     F. William Scholz, II

Officers:

     Mario J. Gabelli              Chief Executive Officer
                                   and Chief Investment Officer

     Joseph R. Rindler, Jr.        Chairman

     Douglas R. Jamieson           Executive Vice President and
                                   Chief Operating Officer

     Robert S. Zuccaro             Vice President and Chief
                                   Financial Officer

     Stephen G. Bondi              Vice President

     James E. McKee                Vice President, General Counsel
                                   and Secretary

     Peter D. Goldstein            Deputy General Counsel and
                                   Assistant Secretary

Gabelli Funds, LLC

Officers:

     Mario J. Gabelli              Chief Investment Officer

     Bruce N. Alpert               Executive Vice President and
                                   Chief Operating Officer

     Gus Coutsouros                Vice President and Chief Financial
                                   Officer

     Stephen G. Bondi              Vice President

     James E. McKee                Secretary


Gabelli Advisers, Inc.

Directors:

     Bruce N. Alpert
     John D. Gabelli
     Joseph R. Rindler, Jr.

Officers:

     Bruce N. Alpert               Chief Operating Officer

     Stephen G. Bondi              Vice President

     James E. McKee                Secretary

Gabelli Securities, Inc.

Directors:

     Robert W. Blake               President of W.R. Blake
                                   & Sons, Inc.
                                   196-20 Northern Boulevard
                                   Flushing, NY  11358



     Douglas G. DeVivo             General Partner of ALCE
                                   Partners, L.P.
                                   One First Street, Suite 16
                                   Los Altos, CA  94022

     Joseph R. Rindler, Jr.        See above

Officers:

     Stephen G. Bondi              Vice President

     Robert S. Zuccaro             Vice President-Finance

     James E. McKee                Secretary

Gabelli & Company, Inc.

Directors:

     James G. Webster, III         Chairman

     Stephen G. Bondi              See above

     Donald C. Jenkins             Director of Research

Officers:

     James G. Webster, III         Chairman

     Stephen G. Bondi              Vice President

     Bruce N. Alpert               Vice President-Mutual Funds

     Walter K. Walsh               Compliance Officer

     James E. McKee                Secretary


GLI, Inc.
Directors:

     Mario J. Gabelli              See above-Gabelli Group Capital
                                   Partners, Inc.
Officers:

     Mario J. Gabelli              Chairman and Chief Investment
                                   Officer

     Stephen G. Bondi              Vice President

Gabelli Associates Limited

Directors:

     Mario J. Gabelli              See above-Gabelli Group Capital
                                   Partners, Inc.


     Roger Hanson (2)              MeesPierson  (Cayman)
                                   Limited
                                   British American Centre
                                   Dr. Roy's Drive- Phase 3
                                   Georgetown, Grand Cayman
                                   Cayman Islands, British
                                   WestIndies
Officers:

     Mario J. Gabelli              Chief Investment Officer

     Kevin Bromley (2)             Vice President, Treasurer and
                                   Assistant Secretary

     Sandra Wright (2)             Secretary and Assistant Treasurer


Gabelli International Limited

Directors:

     Mario J. Gabelli              See above-Gabelli Group Capital
                                   Partners, Inc.

     Roger Hanson (2)              MeesPierson  (Cayman)
                                   Limited
                                   British American Centre
                                   Dr. Roy's Drive- Phase 3
                                   Georgetown, Grand Cayman
                                   Cayman Islands, British West Indies
Officers:

     Kevin Bromley (2)             Vice President, Treasurer, and
                                   Assistant Secretary
                                   MeesPierson (Cayman) Limited
                                   British American Centre
                                   Dr. Roy's Drive- Phase 3
                                   Georgetown, Grand Cayman
                                   Cayman Islands, British West Indies

     Sandra Wright (2)             Secretary and Assistant Treasurer
                                   Assistant Secretary
                                   MeesPierson (Cayman) Limited
                                   British American Centre
                                   Dr. Roy's Drive- Phase 3
                                   Georgetown, Grand Cayman
                                   Cayman Islands, British West Indies

Gemini Capitial Management Ltd.

Directors:

     Marc J. Gabelli               See above-Gabelli Group Capital
                                   Partners, Inc.

     Stephen G. Bondi              See Above-Gabelli Group Capital
                                   Partners, Inc.


     Michael A. Salatto            Controller, Gabelli Securities,
                                   Inc.

     Michael J. Burns (3)          Appleby, Spurling & Kempe
                                   Cedar House
                                   41 Cedar Avenue
                                   Hamilton, HM12
                                   Bermuda

     Douglas Molyneux (3)          Appleby, Spurling & Kempe
                                   Cedar House
                                   41 Cedar Avenue
                                   Hamilton, HM12
                                   Bermuda

Gabelli Fund, LDC

Directors:

     Johann S. Wong (4)            c/o Tremont (Bermuda)
                                   Limited
                                   Tremont House
                                   4 Park Road
                                   Hamilton HM 11, Bermuda

     Peter D. Anderson (5)         Givens Hall Bank & Trust
                                   Genesis Building
                                   P.O. Box 2097
                                   Grand Cayman, Cayman Islands
                                   BWI3459498141

     Karl Otto Pohl                See above

     Anthonie C. van Ekris         See below


Gabelli Global Partners, Ltd.

Directors:

     Stephen G. Bondi              See above

     Marc J. Gabelli               See above

     Patrick Salvisberg (6)        Vice President
                                   Institutional Capital Markets
                                   Bear Stearns International Ltd.

     Marco Sampelligrini (7)       Banco Intesa
                                   Milan, Italy

     Antonie Van Ekris             See below

Lynch Corporation
401 Theodore Fremd Avenue
Rye, NY  10580

Directors:


     Mario J. Gabelli              See above-Gabelli Group Capital
                                   Partners, Inc.

     E. Val Cerutti                Business Consultant
                                   Cerutti Consultants
                                   227 McLain Street
                                   Mount Kisco, NY   10540

     Ralph R. Papitto              Chairman of the Board
                                   AFC Cable Systems, Inc.
                                   50 Kennedy Plaza
                                   Suite 1250
                                   Providence, RI  02903

     Avrum Gray                    GBar Limited Partnership
                                   440 South LaSalle, Suite 2900
                                   Chicago, IL 60605

     Louis A. Guzzetti             President and Chief Executive
                                   Officer

Officers:

     Mario J. Gabelli              Chairman


     Louis A. Guzzetti             President and Chief Executive
                                   Officer

     George E. Fuehrer             Vice President-Business Development

     Roger T. Dexter               Controller

     Robert A. Hurwich             Vice President-Administration,
                                   Secretary and General Counsel


Lynch Interactive Corporation
401 Theodore Fremd Avenue
Rye, NY  10580

Directors:

     Paul J. Evanson               President
                                   Florida Light & Power Co.
                                   P.O. Box 14000
                                   700 Universe Blvd.
                                   Juno Beach, FL 33408

     Mario J. Gabelli              See above-Gabelli Group Capital
                                   Partners, Inc.




     Ralph R. Papitto              Chairman of the Board
                                   AFC Cable Systems, Inc.
                                   50 Kennedy Plaza
                                   Suite 1250
                                   Providence, RI  02903

     Salvatore Muoio               Principal
                                   S. Muoio & Co., LLC
                                   Suite 406
                                   509 Madison Ave.
                                   New York, NY 10022

     John C. Ferrara               See above

     David C. Mitchell             Business Consultant
                                   c/o Lynch Corporation
                                   401 Theodore Fremd Ave.
                                   Rye, NY 10580

Officers:

     Mario J. Gabelli              Chairman and Chief Executive
                                   Officer

     Robert E. Dolan               Chief Financial Officer

     Robert A. Hurwich             Vice President-Administration,
                                   Secretary and General Counsel


Brighton Communications Corporation
401 Theodore Fremd Ave
Rye, NY 105820

Directors:

     Robert E. Dolan               See above-Lynch Interactive
                                   Corporation

     Robert A. Hurwich             See above-Lynch Interactive
                                   Corporation
Officers:

     Robert E. Dolan               President, Controller, Tresurer
                                   and Assistant Secretary

     Robert A. Hurwich             Secreatry and Assistant Tresurer


Spinnaker Industries, Inc.
600 N. Pearl Street
uite 2160
Dallas, TX  75201

Directors:

     Joseph P. Rhein               5003 Central Avenue
                                   Ocean City, NJ  08226

     Richard J. Boyle              The Boyle Group, Inc.
                                   6110 Blue Circle Drive
                                   Suite 250
                                   Minnetonka, MN  55343

     Ned N. Fleming, III           Boyle, Fleming,
                                   & Co., Inc.
                                   600 N. Pearl Street
                                   Suite 2160
                                   Dallas, TX  75201

     Robert E. Dolan               See above Lynch Corporation

     Anthonie C. van Ekris         Chairman and Chief
                                   Executive Officer
                                   Balmac International, Inc.
                                   61 Broadway
                                   Suite 1900
                                   New York, NY  10006

     Mario J. Gabelli              See above-Gabelli Group Capital
                                   Partners, Inc.

     E. Val Cerutti                See above-Lynch Corporation

     Ralph R. Papitto              See above-Lynch Corporation

Officers:

     Ned N. Fleming, III           President and Chief Operating
                                   Officer

     Richard J. Boyle              Chairman and Chief Executive
                                   Officer

     Robert A. Hurwich             Secretary

     Mark A. Matteson              Vice President, Corporate
                                   Development

     Craig Jennings                Vice President, Finance and
                                   Treasurer

Entoleter, Inc.
251 Welton Street
Hamden, CT  06517

Directors:

     Ned N. Fleming, III           See above-Spinnaker

     Mark A. Matteson              See above-Spinnaker

     Robert P. Wentzel             See above Entoleter

     James Fleming                 230 Saugatuck Avenue, Unit 8
                                   Westport, CT  06880
Officers:

     Robert P. Wentzel             President

     Mark R. Matteson              Vice President

     Charles DeMarino              Controller & Secretary


Western New Mexico Telephone Company
314 Yankee Street
Silver City, NM  88062

Directors:

     Jack W. Keen                  Chairman and President

     Dr. Brian E. Gordon           Vice President

     Mary Beth Baxter              Secretary & Treasurer

     John Clay Keen                Route 6
                                   Box 270
                                   Greenville, TX 75401

     Robert E. Dolan               See above-Lynch Corporation

     Robert A. Hurwich             See above-Lynch Corporation

     Carmine Ceraolo               See above-Lynch Corporation

     Mary J. Carroll               See above-Lynch Corporation

     Eugene P. Connell             See above-Lynch Corporation

Officers:

     Jack W. Keen                  Chairman and President

     Dr. Brian E. Gordon           Vice President

     Charles M. Baxter             Sr. Vice President-Operations

     Mary Beth Baxter              Secretary & Treasurer

     Robert A. Hurwich             Assistant Treasurer and Assistant
                                   Secretary

Inter-Community Telephone Company, L.L.C.
P.O. Box A
Nome, ND  58062

Managers:

     Carole Rau                    Executive Assistant
                                   Lynch Corporation
                                   401 Theodore Fremd Ave.
                                   Rye, NY 10580

     Mary J. Carroll               See above-Lynch Corporation

     Robert E. Dolan               See above-Lynch Corporation

     Robert A. Hurwich             See above-Lynch Corporation

     Carmine Ceraolo               Assistant Controller
                                   Lynch Corporation
                                   401 Theodore Fremd Ave
                                   Rye, NY 10580

     Robert Snyder                 200 Broadway South
                                   Buffalo, ND  58011

     Keith S. Andersen             See above-Inter-Community Telephone
                                   Company

     Robert Reff                   See above-Inter-Community Telephone
                                   Company

     Jack Bently                   1210 E. Washington Ave
                                   Gilbert, AZ 85234

Officers:

     Robert Snyder                 President

     Keith S. Andersen             Secretary and Treasurer

     Robert A. Hurwich             Assistant Secretary


Lynch Telephone Corporation
401 Theodore Fremd Avenue
Rye, NY 10580

Directors:

     Robert E. Dolan               Controller

     Jack W. Keen                  President

     Robert A. Hurwich             See above-Lynch Corporation

Officers:

     Jack W. Keen                  President

     Robert A. Hurwich             Secretary

     Mary Beth Baxter              Treasurer and
                                   Assistant Secretary

     Robert E. Dolan               Vice President and Controller




     (1) Citizen of Germany
     (2) Citizen of the Cayman Islands
     (3) Citizen of Bermuda
     (4) Citizen of Bermuda and Canada
     (5) Citizen of the UK
     (6) Citizen of Switzerland
     (7) Citizen of Italy








                                                 SCHEDULE II

                                      INFORMATION WITH RESPECT TO
                           TRANSACTIONS EFFECTED DURING THE PAST SIXTY DAYS OR
                           SINCE THE MOST RECENT FILING ON SCHEDULE 13D (1)

                                             SHARES PURCHASED        AVERAGE
                                  DATE            SOLD(-)             PRICE(2)

           COMMON STOCK-SOUTHWEST GAS CORP

          GABELLI SECURITIES,INC.
                                 3/01/00              500-           18.3750
          GAMCO INVESTORS, INC.
                                 3/01/00            2,000            18.1407
                                 3/01/00            8,000-           18.0000
                                 2/24/00            1,000            17.3750
                                 2/15/00              500-           17.8125
                                 2/09/00            3,500-           18.3482
                                 2/01/00            1,000-           19.5625
                                 1/14/00            8,000            21.6875
                                 1/14/00            5,000            21.5625
                                 1/12/00            1,000            21.6875
                                 1/11/00            7,500            21.9375
                                 1/07/00            5,000            21.5000
                                 1/07/00            6,500            21.5208
          GABELLI FUNDS, LLC.
               THE GABELLI ABC FUND
                                 2/17/00            2,000            17.4875
















          (1) UNLESS OTHERWISE INDICATED, ALL TRANSACTIONS WERE EFFECTED
              ON THE NYSE.

          (2) PRICE EXCLUDES COMMISSION.





















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