ABOUT THIS PROJECT
The Grange Hall Creek Tributary Northeast at Margaret W. Carpenter Park Improvements Project is a collaborative effort led by the City of Thornton and the Mile High Flood District (MHFD), with Otak, Inc. serving as the design engineer. Located within Margaret W. Carpenter Park near East 112th Avenue in Thornton, Colorado, the project focuses on restoring channel stability, improving stormwater infrastructure, and enhancing ecological function along the Grange Hall Creek Tributary Northeast corridor.
This project addresses channel instability, erosion, and stormwater outfall impacts through a comprehensive stream restoration approach. The design incorporates hydraulic improvements, grade control features, habitat enhancements, and native revegetation to create a resilient system that performs during both low-flow and storm events.
Key improvements include:
-
Reconstruction and realignment of the main channel with a pool-riffle system
-
Construction of a side channel to improve hydraulic capacity and habitat diversity
-
Installation of grade control structures, riprap sills, and bank stabilization measures
-
Stormwater outfall reconstruction with a stilling/tailwater basin to reduce scour
-
Large wood structures, brush trenches, and in-stream habitat features
-
Wetland plugs, willow stakes, native riparian seeding, and upland revegetation
-
Erosion control and floodplain grading to support long-term channel stability
Beyond its technical objectives, the Grange Hall project provides meaningful community and environmental benefits. It strengthens aging drainage infrastructure, improves flood resilience, enhances water quality, and restores native habitat within a highly utilized park and trail corridor. Through close coordination between the City of Thornton, MHFD, and the project team, construction will be executed with a focus on durability, environmental stewardship, and long-term performance.
CLIENT
City of Thornton and Mile High Flood District
LOCATION
Thornton, Colorado
WATCH NOW
PROJECT SHOWCASE VIDEO
From a bird’s-eye perspective, you can see the incredible work being carried out by Naranjo Civil Constructors on-site. With a commitment to environmental restoration and construction excellence, our team is transforming the landscape while ensuring the highest standards of quality and sustainability.
VISUALIZE IT
INTERACTIVE CAD OVERLAY
Explore the engineered design seamlessly overlaid onto the most up-to-date, high-resolution drone survey of the project site. This powerful visualization highlights both the precision of our engineering and the accuracy of our aerial data, providing a clear picture of how the design integrates with existing site conditions.
View CAD Overlay
View Now
PROJECT EVOLUTION
Experience the progress first-hand with our interactive image comparison slider. Seamlessly switch between before-and-after views to see the impactful changes made on-site, highlighting the transformation and precision of our work.”
