The new 90,000 acre-foot water storage reservoir will be retained by a 360 foot tall rockfill dam
This Chimney Hollow Reservoir Project is needed to firm water supply for 400,000 residents in northern Colorado, through partnership with 12 public agencies.
We are providing complete engineering and design of the Chimney Hollow Reservoir Project. The project consists of an approximately 360-ft tall hydraulic asphalt core rockfill main dam, 40-foot-high zoned rockfill saddle dam, inlet/outlet works in a tunnel in the right abutment, and uncontrolled concrete spillway. It also requires large diameter conveyance piping and valve house to tie into the US Bureau of Reclamation’s Colorado-Big Thompson Project, as well as access roads.
Our scope of work includes geotechnical investigations, evaluation of alternatives, complete engineering analyses, preparation of intermediate and final designs, preparation of bid documents, support during bidding, and engineering services during construction. The work includes a large test quarry and test fill to evaluate the rockfill properties for final design.
The Northern Colorado Water Conservancy District Subdistrict obtained all required Federal Permits for the project. When complete, the main dam will be one of the largest in Colorado.
At a Glance
- Offices
Don Montgomery, Senior Principal
My goal is to be a trusted partner to our clients as we work to serve them and the community by putting best practices into action.
Greg Raines, Vice President
It is our responsibility to society, as the engineers, to deliver water conveyance and power tunnels in a safe and reliable manner.
Albert Ruiz, Senior Tunnel and Trenchless Engineer
My goal is to bring underground solutions to an increasingly crowded and urban world.
Christine Weber, Principal, Civil Engineer
I’m immensely pleased when our hard-earned knowledge and experience lead to elegant solutions for complex dam designs and dam safety issues.
Treating water with respect will help is build a better, more sustainable future.
Christina Brueckman, Senior Associate, Geological Engineer
Our projects are not cookie cutter designs—our dams group pushes boundaries on creativity and technology.
Carolyn Randolph Loar, Principal Engineering Geologist
I’m passionate about geological data and investigations. I believe they’re the foundation for any successful engineering project.
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