The Suncor Energy Inc. Oil Sands Project Millennium is an integrated expansion of Suncor's mining, extraction and upgrading operations. The project includes expansion of the recently approved Steepbank Mine area on the east side of the Athabasca River. It also involves establishment of primary extraction facilities and support utility infrastructure on the east side of the river. The third major component of Project Millennium is an expansion of the upgrading capability at the Lease 86, 17 facility. Regulatory agencies are focusing attention on cumulative impacts on aquatic resources in the Steepbank and Athabasca River watersheds because of the number of existing and proposed oil sands developments in the region. In response to these concerns, Suncor has initiated a conceptual plan for achieving no net loss of the productive capacity of fish habitat on Leases 97, 25 and 19 and the adjacent reaches of the Steepbank and Athabasca Rivers through the life of the project. Suncor is committed to maintaining or creating, for the mine development area, fisheries habitat that is equivalent to, or greater in projective capacity than what is currently available. The objectives of the conceptual no net loss plan are: to demonstrate the feasibility of fish habitat protection and replacement through all phases of mine development; to demonstrate a plan to mitigate short-term impacts to fish habitat during construction; and to provide a basis for discussion and resolution of fisheries issues with regulators and stakeholders.