UNITED STATES OF AMERICA SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13-A - 16 OR 15D - 16

OF THE SECURITIES AND EXCHANGE ACT OF 1934

~~January~~February 2028, 2005

~~AES~~Commission ~~GENER~~File ~~S.A.~~Number: 1-13210

AES GENER S.A. (Exact name of registrant as specified in its charter)

AES GENER INC. (Translation of registrant's name into English)

~~(Translation~~Mariano ofSanches Fontecilla ~~registrant's~~310, ~~name~~3rd, ~~into~~Floor, ~~English~~Santiago Chile (562) 686 8900

Mariano Sánchez Fontecilla 310, 3rd Floor

(Address and phone number of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F X x Form 40-F o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): _ o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): _ o

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission ~~pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.~~

~~Yes No X~~ pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

~~If "~~Yes~~" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82~~ o No x

On If ~~January~~"Yes" ~~18,~~is ~~2005~~marked, indicate ~~the~~below ~~Registrant filed with~~ the ~~Superintendencia~~file denumber ~~Valores~~assigned ~~y Seguros of Chile (the "SVS") the Answer~~ to ~~Official Notice No. 00425 dated sent by~~ the ~~SVS~~registrant onin ~~January~~connection ~~14,~~with Rule 12g3-2(b): ~~2005.~~ 82-

~~Attached~~On isFebruary an24, ~~English~~2005, ~~translation~~the ofRegistrant filed with the Superintendencia ~~report~~de ~~that~~Valores ~~was~~y ~~filed~~Seguros byof Chile (the ~~Registration~~"SVS") ~~with~~a letter to update the information related to Official Notice No. 00425 sent by the SVS on January 14, 2005.

~~TABLE~~Attached OFis ~~CONTENTS~~an English translation of the report that was filed with the SVS.

EXHIBIT ~~Page~~INDEX

-Page ~~Answer~~1. Letter related to Official Notice No. 00425 ~~dated January 14, 2005................~~ 2

~~Santiago,~~EXHIBIT ~~January~~1 ~~18, 2005~~

~~G.G.~~Santiago, February 24th, 2005~~/16~~

Rol S.V.S. NNo. 4272

~~Securities~~Mr. ~~Intendant~~Alejandro Ferreiro Yazigi

~~Superintendency~~ Superintendent of Securities and ~~Insurance~~Insurances

~~Re: Answer~~Superintendence toof ~~Official~~Securities ~~Notice No. 00425 dated January 14, 2005~~and Insurances

~~Dear~~Re.: ~~Sir~~Notice No. 00425 dated January 14th, 2005

WeDear hereby address you in order to give answer to the above-captioned Official Notice, complementing the information provided as a material fact on January 11, 2005 and updating the information submitted to said Superintendency in the month of April of 2004 (letter G.G.096/2004). The foregoing, due to the re-starting of the reductions in the supply of natural gas determined by the producers members of the Sierra Chata Consortium, as a result of the instructions for an additional gas injection that they received from the Argentine authorities. That, within the general framework of the provisions in Resolution 265/04 dated March 26, 2004 and Resolution 659/04 dated June 17, 2004, which approved the "Complementary Program of Internal Market Supply of Natural Gas" (Programa Complementario de Abastecimiento al Mercado Interno de Gas Natural), both issued by the Secretariat of Energy of said country.Sir:

InConsistent ~~this~~with ~~respect~~the indicated in the Notice of the reference, weand ~~may~~in order to update the information sent to said Superintendence on January 18th, this year, we inform you asthe ~~follows~~following:

1. In- The producers of the ~~first~~Sierra ~~place~~Chata Consortium of the Neuquen Basin, responsible itfor ~~may~~supplying benatural ~~indicated~~gas ~~that~~to the ~~"Complementary~~Nueva ~~Program~~Renca ofPlant ~~Internal~~-owned ~~Market~~by ~~Supply~~our subsidiary ofSociedad ~~Natural~~Electrica ~~Gas"~~Santiago ~~substituted~~S.A.-, ~~the~~are ~~restrictions~~delivering alternative energy to the ~~export~~Argentine ofdomestic ~~natural~~market, ~~gas~~in ~~imposed~~agreement bywith ~~Resolution~~the ~~No.~~regulations 27of said country (Resolution 659/~~2004~~04 of the ~~Under-~~Secretariat of ~~Fuels~~Energy). ofThe ~~the Argentine Republic~~hereinbefore mentioned, ~~ordering~~has allowed the ~~natural~~Sierra ~~gas~~Chata ~~producers~~Consortium to ~~inject~~keep ~~additional~~operating ~~volumes~~their natural togas ~~the~~export ~~domestic~~authorization ~~market~~to ~~and~~our country, inwithout ~~its~~affecting ~~case,~~the tosupply ~~proceed~~ to the ~~re-direction~~Nueva ~~and~~Renca ~~eventual~~Plant, ~~affectation~~which ofis ~~the~~currently ~~volumes~~operating ~~authorized~~with ~~for~~natural ~~export~~gas and at full-scale.

As2.- ofConsidering ~~the~~said ~~date~~contribution of ~~this~~alternative ~~communication,~~energy weto ~~have only received notice from~~ the ~~Sierra Chata Consortium producers of the Neuquen Basin of such additional requirements of the~~ Argentine domestic ~~internal~~ market., ~~Those producers are~~ the ~~responsible~~costs for the ~~supply~~operation of ~~natural gas to~~ the Nueva Renca plant, ~~owned~~currently amount byto ~~our~~US$26,6/MWh, ~~affiliate~~figure ~~Sociedad~~which ~~Eléctrica~~is ~~Santiago~~favorably ~~S.A.,~~compared ~~in accordance~~ with the ~~firm~~amount ~~supply~~of US$84/MWh, ~~agreement~~reported ~~entered~~in ~~into~~our ~~with~~letter ~~the~~dated ~~members~~January of18th, 2005 corresponding to the operation ~~above-referred~~with ~~Consortium~~fuel oil.

~~The~~3.- ~~restrictions~~With ~~applied~~regard byto the ~~producers~~effects tothat ~~the~~natural ~~daily~~gas supply ofrestrictions ~~the~~from Argentina ~~amount~~have ~~contracted~~on ~~for~~AES ~~the~~Gener ~~normal~~S.A., ~~operation~~we ofindicate ~~the~~that ~~Nueva~~they ~~Renca~~are ~~plant~~still ~~obligated~~represented ~~to operate at~~ by the ~~technical~~greater ~~minimum~~operational ~~(240~~costs. ~~MW)~~So ~~and,~~far ~~subsequently,~~it ~~after~~is ~~having~~not ~~been~~possible ~~increased~~to ondefine ~~January~~the quantification 10over ~~recently past~~results, ~~made~~as itthey ~~impossible~~depend, to ~~continue~~a ~~with~~greater ~~its operation fueled with natural gas~~extent, ~~circumstance~~on ~~that~~the different ~~was~~generation ~~informed~~scenarios toand ~~said~~variables ~~Superintendency~~of asthe anpower ~~material fact on January 11~~system.

~~Notwithstanding the foregoing~~ Cordially, immediately after that, the adjustments required in order to habilitate the operation of the plant using a back up alternative fuel (diesel) were carried out. This manner, as from January 12, the Nueva Renca plant has operated with diesel or, alternatively, at technical minimum, each time the amount of fuel that makes said operation possible is accumulated. All that, in accordance with the requirements of the Load Economic Dispatch Center of the Central Interconnected System (Centro de Despacho Económico de Carga del Sistema Interconnectado Central - CDEC-SIC).

~~2. In~~ Francisco accordance with the preceding paragraph, the use of diesel for the operation of the Nueva Renca plant amounts to US$84 /MWh. Notwithstanding the foregoing, as a result of a series of improvements implemented in said plant during the year 2004, at present, with the use of diesel fuel, the plant reaches a maximum capacity of 320 MWh, which means a diminishment of only 50 MWh as compared to the operation at full load with natural gas. In addition, it does not require a detention of 48 hours in order to alternate the operation natural gas-diesel, and vice versa.Castro Crichton

~~3. In~~Chief ~~relation~~Executive Officer to the legal measures adopted both by AES Gener S.A. and its affiliate, Sociedad Eléctrica Santiago S.A., and as it was timely informed as a material fact to said Superintendency, on July 13, 2004, those companies filed a complaint in arbitration with the International Court of Arbitration of the International Chamber of Commerce against the producers members of the Sierra Chata Consortium, seeking the enforcement of the natural gas delivery obligations contractually committed, in addition of holding them responsible for damages incurred as a consequence of the supply restrictions.(s)

Finally, in connection with the financial effects, we may indicate that they are represented by the higher operational costs derived from the use of alternative fuel, larger purchases in the spot market and a reduction in the sales to said market. The quantification of which in results is not possible to define as of this date, since they are strongly affected by the diverse scenarios and generation variables of the electric system.

Sincerely yours,

Luis Felipe Cerón Cerón

Chief Executive Officer

AES Gener S.A.

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SIGNATURE

Pursuant to the requirements 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.

AES GENER S.A.

(Registrant)

Date: ~~January~~February 2028, ~~2004~~2005 By: /s/ FRANCISCO CASTRO Francisco Castro Chief Financial Officer

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