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Grange Hall Creek Improvements

Northglenn, Colorado

A book cover featuring a green line, highlighting its unique projects.

The Grange Hall Creek Improvements Project in Northglenn, Colorado, was a creative collaboration that transformed nearly 6,000 feet of channel using bioengineering techniques, boulder drop structures, and water quality ponds to stabilize banks and improve stormwater quality. The project included a trail system, pedestrian underpass below Washington Street, three box culverts, and four sculpted concrete drop structures. To blend these elements into the natural environment, box culverts were disguised as pedestrian bridges, and hand-formed concrete “exposed sedimentary rock” drop structures replaced standard boulders, fitting the prairie landscape.

An extension addressed a failing CMP pipe near Marion Street. Instead of replacing the pipe, an open channel was designed using boulders and concrete, creating both aesthetic and practical benefits. The project flows through the historic Stonehocker farm, which is being restored alongside an adjacent residential development and a 50-acre open space.

Muller also completed a trail routing and railroad underpass design, connecting the Grange Hall Creek Trail across the Union Pacific Railroad. This project included lighting, utility coordination, and construction oversight, continuing the work of the award-winning Grange Hall Creek Channel Restoration and Trail Project. Overall, the project created a functional, safe, and beautiful open space for the community while protecting natural resources.

OWNER

City of Northglenn
Mile High Flood District

SERVICES

Stormwater & Floodplain Management

AWARDS

  • 2001 Colorado Association of Stormwater and Floodplain Managers (CASFM) Grand Award for Engineering Excellence

Statistics

1 Trail System | 1 Pedestrian Bridge | 3 Concrete Box Culverts | 4 Sculpted Concrete Drop Structures | 19 Drop Structures | 1 Pedestrian Underpass | 83 Storm Drains | 1 Major Storm Drain Outfalls | 3 Stream Designs

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