Blackhawk Creek Stabilization, City of Davenport, Iowa
Both traditional and bioengineering stabilization methods were considered.
"Over the course of this project, Bolton & Menk developed a trusting partnership with those involved and have resulted in a final product that exceeded our initial expectations. The strong partnerships were well above our standard which ensured that participating agencies and the public had a common understanding of the City's needs and desires."
- Aaron Parrish, City Administrator
Under tight deadlines, Bolton & Menk presented a new design concept to increase pollutant removal through an innovative treatment train approach with multiple uses of iron enhanced sand filtration technology. A flow diversion channel, rock gabion weir with iron enhanced sand filtration core, bioretention floodplain, and perched iron enhanced sand filter maximized the opportunity for runoff treatment. A total phosphorus reduction goal of 140 pounds per year was established, with the project providing more than 70 percent of that goal.
This project has become the gold standard for how the city intends to manage stormwater. Investing in these innovative projects will continue to protect valuable water resources, reduce further degradation of the nearly-impaired resources, and eliminate the need for lengthy and costly lake restoration projects in the future.
Both traditional and bioengineering stabilization methods were considered.
As we worked through the key drivers to low salt design, the light bulbs were
With coordination from multiple stakeholders in the project, the rock riffle project overcame hurdles and
Clear Creek’s revival brings back habitat, buffers, and biodiversity—proof that urban streams can thrive again.