An aerial view of Gross Reservoir in 2002, when water levels were dangerously low. Q&A on the Gross Reservoir Expansion Project
Denver Water's program manager talks milestones and water security.
 July 27, 2026 Gross Dam as seen in June 2026 with the last of the roller-compacted concrete placed. Gross Dam construction milestone
Listen as Denver Water's program manager shares update, new images from the project.
 July 20, 2026 A wide view of a concrete dam with mountains and water in the background and a hill of trees in the foreground. Major milestone for Gross Dam construction
Workers 'top out' raising the dam in Boulder County.
 June 8, 2026 The view from the bottom of a concrete dam looking up toward the top. Push to the top at Gross Dam, in two parts
Major 2026 construction brings new challenges.
 May 21, 2026 Cover Page of the 2025 Gross Reservoir Year in Review 2025 Year in Review
This report highlights key accomplishments in 2025 and provides a look ahead for planned activities in 2026.
 February 27, 2026 Drone image of Gross Dam from a bird's eye view. Gross Dam’s successful year: Dam raise 95% complete
Workers raise dam 109 feet in 2025. Next year’s goal: Reaching the top.
 December 12, 2025 Drone image of back of Gross Dam still in progress but above the original dam. Gross Dam construction making steady progress
Dam is now 60 feet taller after busy summer of work.
 September 19, 2025 Group of construction workers on top of the concrete where the old dam meets the new. Big milestone for Denver Water’s Gross Reservoir Expansion Project
New concrete reaches height of existing structure as dam officially starts to go up.
 August 1, 2025 Update on Gross Reservoir Expansion Project following May 6, 2025, testimony
Denver Water provides statement on the risk presented by delaying construction.
 May 13, 2025