Thefirst significant Front Range water project in a generation moves ahead. A long-planned expansion of Gross Reservoir, north of Denver along South Boulder Creek, has received its key environmental approval.
Following 14 years of careful study, evaluation and deliberation, the Army Corps of Engineers has approved Denver Water’s request to raise Gross Dam in Boulder County. The additional water stored in Gross Reservoir will help prevent future shortfalls during droughts and helps offset an imbalance in Denver Water’s collection system.
The approval comes in the form of a record of decision and 404 Permit – two documents required by the federal government as part of the National Environmental Policy Act.
Denver Water appreciates the Corps’ dedication and commitment to careful study of the anticipated impacts of this project, said Denver Water CEO Jim Lochhead. We will complete this project responsibly, as evidenced by our actions during the public process and the resulting robust environmental protections we’ve agreed to along the way. We’re proud to be doing the right thing.
The existing dam was built in the early 1950s and was designed to be expanded in the future to increase water storage capacity. The Gross Reservoir Expansion Project approval completes this original vision.
Expanding Gross Reservoir is a major part of Denver Water’s long-term plan to deliver safe, reliable water to the people it serves now and into the future. The project is part of Denver Water’s multi-pronged approach that includes conservation, reuse and responsibly sourcing new supply.
Issuance of this permit will unlock significant resources that will allow us to do good things for the river and the environment, said Mely Whiting, counsel for Trout Unlimited.
In accordance with existing agreements, including the Colorado River Cooperative Agreement and Grand County’s Learning By Doing, and conditions in the 404 Permit, Denver Water will provide millions of dollars to improve watershed health in the critical Colorado and South Platte River Basins. Lochhead said these commitments are one reason that last year Colorado Department of Public Health and Environment found that the project will have a net environmental benefit on the state.
The project has earned key endorsements from Gov. Hickenlooper, state and federal lawmakers, major environmental groups, local mayors and city councils, chambers of commerce and economic development corporations, county elected officials and water interests on both sides of the divide.
The next milestone we anticipate is approval by the Federal Energy Regulatory Commission of Denver Water’s hydropower license amendment application at some point next year, said Jeff Martin, Gross Reservoir Expansion program manager. In the meantime, Denver Water continues to make significant investments in setting a firm foundation for the project’s overall success by recently hiring Black and Veatch as the owner’s representative. We are also in the process of procuring a design engineer.
Preconstruction activities, including dam design and geotechnical work, are expected to begin in 2018. The entire project is expected to be completed in 2025.