Current construction activities
Current work activities:
On Wednesday, June 3, Denver Water and its contractor, Kiewit Barnard completed placing roller-compacted concrete to raise Gross Dam. This is a huge milestone for the project, but there's still work to be done on the dam raise. This work includes finishing the top foot of the dam; constructing the top of the spillway; building a bridge over the spillway; completing the stilling basin at the bottom of the dam and electrical installation. Completion of the dam raise is still expected to wrap up mid-2027.
During this work you may:
- See:
- Shuttles, passenger vehicles and deliveries headed to site daily.
- Work during the day and night, including lights to support the safety of our crews.
- Hear:
- Noise from vehicles, equipment and work around site.
Legal update:
On Sept. 15, 2026, the 10th Circuit Court of Appeals confirmed that the Gross Reservoir Expansion Project was lawfully permitted by the U.S. Army Corps of Engineers and that Denver Water can proceed with the final stages of the project to fill the expanded reservoir. Read the full statement.
Questions:
If you have any questions, please fill out the form on our contact webpage or email grossreservoir@denverwater.org.
You can see the most up-to-date information, including public access, road closures and blasting activities, on the map below.
Tips on how to use the map for desktop and laptop users:
- To zoom in/out on the map: Press the + or – buttons on the bottom left side of the map or double click an area on the map.
- To see additional details on a line or pin on the map: Click the item and a box on the left side of the map will appear with additional information.
- To move around the map: Using your mouse, click and hold while moving your mouse to move map.
The video below provides an update on recent construction activities at Gross Reservoir.