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Toll Gate Creek Confluence Channel Improvements

Natural channel design principles mitigate impacts of densely developed watersheds

  • 6.9K

    Linear Feet (Stream Restoration)

  • 170M

    Stream Channels Evaluated

  • 1


  • City of Aurora, Colorado

    City of Aurora, Colorado

Designing a fully-functional stream and floodplain system tailored to an urbanized watershed

Stream channels in the City of Aurora were experiencing significant impairments due to rapid urbanization within the watershed. The result? Diminished water quality and an increased flooding risk for infrastructure. Following a detailed geomorphic assessment our team completed (that totaled more than 170 miles), the City of Aurora kept Stantec on to lead a multi-disciplinary team in developing stream restoration and sanitary sewer protection designs, a regional trail system, and floodplain study.

We used natural channel design and bioengineering techniques to stabilize the eroding stream channels and enhance aquatic, riparian, and terrestrial ecosystem functionality. Improvements included establishing new channel and associated floodplain corridors, creating appropriate riffle/pool morphology, reestablishing emergent wetlands, and replanting native species. Our team provided construction oversight and field engineering, allowing for flexible field changes and design optimization throughout implementation.

The new floodplain provides increased water storage capacity—reducing the risk of flooding to adjacent properties—and improved aquatic and riparian habitat. Public accessibility was also enhanced throughout the riverscape with a new regional bike trail that connects to an extensive existing trail network.

At a Glance

  • City of Aurora
  • Mile High Flood District
  • Olsson Associates
  • ERO Resources Corporation
  • CEI Constructors
CCA Annual H20 Awards for Top Natural Waterway/Wetland Restoration/Preservation (>$6 Million)
Meet Our Team

TC Dinkins, Project Engineer, Stream Restoration

I enjoy being able to combine my love of the outdoors with my job—restoring impaired stream and river systems to a more functioning state.
TC Dinkins Project Engineer, Stream Restoration Read More

Randy Walsh, Senior Restoration Scientist

The best part of my work is the people—my clients and my colleagues.

Colin Haggerty, Principal

I believe we all need to move past trying to make those who came before us proud and instead make those who are following us proud.

TC Dinkins

Project Engineer, Stream Restoration

Randy Walsh

Senior Restoration Scientist

Colin Haggerty


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