Gross Reservoir Expansion Project
Progress and schedule
There are many steps to building a dam 471 feet high. Final dam design will continue into 2020 to meet our current completion date of 2025. A lot of other preparatory work is required such as quarrying and preparing the existing dam and foundation for the new dam.
Denver Water is committed to working closely with residents to ensure safety and open communication throughout construction.
Latest News / Blog
Aging outlet works at base of Denver Water dam call for major upgrade to valves, pipes.
October 16, 2020 - TAP - "At Gross Reservoir, one of the most important reservoirs in Denver Water’s system, it’s time to replace the outlet works, a seven-month job so big it will require sawing up massive slabs of concrete and removing fat steel pipes so big a short...
Denver Water submits 1041 permit application with Boulder County
On Sept. 21, Denver Water submitted its 1041 permit application with Boulder County for the Gross Reservoir Expansion Project. The application document is available to view here. We look forward to Boulder County’s 1041 review of the Gross Reservoir expansion with...
Drilling tests to run Oct. 5-30
Beginning Monday, Oct. 5, Denver Water will begin a subsurface investigation that will involve drilling operations close to Osprey Point. This work will inform Denver Water on the suitability of the proposed Osprey Point quarry location for the Gross Reservoir...