Chimney Hollow Reservoir Project
The Chimney Hollow Reservoir Project is a collaboration between 12 Northeastern Colorado water providers to improve the reliability of, or make firm, water supplies from the Windy Gap Project. Chimney Hollow Reservoir will be located just west of Carter Lake in Larimer County to provide dedicated storage to supply a reliable 30,000 acre-feet of water each year for future generations.

Provides storage for 30,000 acre-feet of existing water rights associated with the Windy Gap Project

Provides environmental benefits to Colorado's rivers and streams through various commitments

Enhances recreation opportunities to encourage healthy, outdoor lifestyles for residents

Helps meet an increased demand for water in Northern Colorado communities
News

Final Two Valves Arrive on Site
Chimney Hollow Reservoir crews celebrated on site on Monday, Feb. 24, as the final two valves arrived from Germany. Workers will install the two valves inside the valve house by the end of March.

Crews Wrap Up Critical Spillway Structure
One of the highest priorities of project managers at Chimney Hollow is ensuring the new reservoir’s infrastructure is ready for anything – even if “anything” might happen only every 500 years.

Inlet/Outlet Tunnel Close to Completion
The 2,000-long-foot tunnel that will bring water in and out of the reservoir is about 80 percent complete as of the end of February.