Gross Reservoir Expansion Project

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

Final federal approval secured for Gross Reservoir Expansion Project

DENVER — July 17, 2020 — Today, the Federal Energy Regulatory Commission ordered Denver Water to proceed with design and construction to expand Gross Reservoir in Boulder County. Seventeen years ago, Denver Water began the federal environmental permitting process that...

Virtual Appointment Booking

Have you heard that the Gross Reservoir Expansion Project now offers virtual one-on-one appointments? Due to continued social distancing guidelines, we are not able to host our regular office hours at our public information yurt this year. However, we would still love...