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Chimney Hollow Reservoir

The Chimney Hollow Reservoir dam will be the tallest dam built in Colorado in 50 years and incorporates asphalt core technology

  • Southwest of Loveland, Colorado

    Southwest of Loveland, Colorado

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

Meet Our Team

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.
Albert Ruiz Senior Tunnel and Trenchless Engineer Read More

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.

Justin D. Bartels, Principal, Hydraulic Engineer

Treating water with respect will help is build a better, more sustainable future.
Justin D. Bartels Principal, Hydraulic Engineer Read More

Christina Brueckman, Senior Associate, Geological Engineer

Our projects are not cookie cutter designs—our dams group pushes boundaries on creativity and technology.
Christina Brueckman Senior Associate, Geological Engineer Read More

Don Montgomery

Senior Principal

Greg Raines

Vice President

Albert Ruiz

Senior Tunnel and Trenchless Engineer

Christine Weber

Principal, Civil Engineer

Justin D. Bartels

Principal, Hydraulic Engineer

Christina Brueckman

Senior Associate, Geological Engineer

We’re better together

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    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

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