Due to ongoing construction activities at Gross Reservoir, ice fishing is not permitted during the 2022-23 winter season. Hiking and picnicking are still open at the North Shore recreation area. For more information on site closures, roadway work and recreation access visit the project My Map.
Construction for the Gross Reservoir Expansion Project started April 1, 2022. The project will raise the height of the dam by 131 feet, tripling the reservoir’s capacity from approximately 42,000 acre-feet to 119,000 acre-feet.
When complete, the reservoir, located in western Boulder County, will be Denver Water’s second-largest and will provide essential flexibility and resiliency to our customers in the face of increasing impacts from climate change.
We will update our construction page with information about activities on-site. You can also stay connected by signing up for our e-newsletter or following us on social media. Want to talk to a project representative? Sign up for a one-on-one appointment, in-person or virtual, on our contact page.
