Skip to main content
Start of main content

Gross Reservoir Expansion (Gross Dam Raise)

We worked with Denver Water to expand the reservoir at Gross Dam by raising the existing 340-foot-high concrete structure

  • $13M

    Design Value

  • $464M

    Construction Value

  • 340

    Foot High Dam - Raised 131 Feet with RCC

  • Boulder, Colorado

    Boulder, Colorado

The tallest dam—using roller-compacted concrete—in the world

We think that strong relationships are key to success on any project—that’s why Denver Water has known they can trust us to provide engineering support for their dam projects for over 40 years, including the Gross Reservoir Expansion Project.

Our work on the Gross Dam has included a broadband of dam safety services, including safety inspections, site-specific Probable Maximum Precipitation (PMP), Seismic Hazard Assessments (SHA) and planning studies for additions to the dam itself. We’ve even prepared an innovative, cost-effective final design for raising Gross Dam that modifies the concrete gravity dam into an arch dam to create a structure that will last two thousand years with the proper care and maintenance. This project is the largest raise of a concrete dam using roller-compacted concrete (RCC) in the world.

Over the years, we’ve combined innovative design with proven technologies to develop solutions that minimize risk to Denver Water and their surrounding communities. We worked to minimize impacts to the communities, and ensured our plans and specifications were clear for the contractors to make sure changes to scope and cost during construction were minimal.

Raising dams to provide water security

Stantec designed what will be the largest raise of a concrete dam using roller-compacted concrete (RCC) in the world. The best part? It will improve water reliability for more than 1.5 million people throughout Colorado’s front range.

Meet Our Team

Mike Rogers, Vice President, Global Dams Practice Leader

The projects we build last generations. Our designs must be sustainable and long lasting for the communities they serve.
Mike Rogers Vice President, Global Dams Practice Leader Read More

Glenn S. Tarbox, Senior Vice President, Energy

I always enjoy my work, but I truly love the everyday relationships I’ve been fortunate enough to create over the years—it drives me every day.
Glenn S. Tarbox Senior Vice President, Energy Read More

Felipe Garcia, Senior Principal, Civil Engineer

Designing the best possible dams and reservoirs takes a committed team.
Felipe Garcia Senior Principal, Civil 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.

Danica Katz, Civil Engineering Designer

When I drive around town, I’m inspired to see how designs can help shape and influence how we travel. I love helping improve public safety.

Mike Rogers

Vice President, Global Dams Practice Leader

Glenn S. Tarbox

Senior Vice President, Energy

Felipe Garcia

Senior Principal, Civil Engineer

Christine Weber

Principal, Civil Engineer

Danica Katz

Civil Engineering Designer

We're better together

  • Become a client

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

    Contact Us
  • 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.

    Join the Team
End of main content
To top