The largest reservoir that’s been built in the U.S. this century has reached its halfway point in construction. Work on Chimney Hollow Reservoir kicked off in August 2021, and two years later the project remains within a couple weeks of its summer 2025 targeted completion date.   

As the project hits the two-year mark, crews have built up 120 feet of what will eventually be the 350-foot-tall main dam at Chimney Hollow Reservoir, while progress also continues on the inlet/outlet tunnel, saddle dam, valve house and other critical infrastructure components.  

In this new video, Northern Water and Barnard project managers touch on the many successes the project has seen in the first half of this four-year construction project.