Completion of each of AES's offers is conditioned on amending Gener's bylaws to permit the ownership of more than 20% of the outstanding Gener shares by any person or group which requires the approval of 75% of Gener's outstanding shares. TransAlta Corp. said it has begun construction of a $400 million (Can.), 650 Mw power project in Sarnia, Ont. The company it will be the largest cogeneration plant in Canada. Full commercial operation of the new plant is expected by October 2002. It will supply Bayer, Dow Chemical Canada Inc., and NOVA Chemicals (Canada) Ltd. Sarnia operations with power and steam. Excess power will be sold into competitive electricity markets, TransAlta said. Dominion Energy, unit of Dominion Resources Inc., said it has reached an agreement with Cleveland Thermal Energy Corp. and Cleveland District Cooling Corp. to purchase Cleveland Energy Resources, a provider of steam and chilled water to downtown Cleveland.