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Upper Cooper Slough Drainage Basin#

Basin Overview#

Outline of the Upper Cooper Slough Drainage Basin

Click to enlarge

The Upper Cooper Slough Basin is a tributary to Boxelder Creek and Lower Cooper Slough. It encompasses 26 square-miles and extends north from the Larimer and Weld Canal and west of Interstate 25. Most of the basin is currently farmland except for the Anheuser-Busch brewery site. The southern portion of the basin within the City of Fort Collins Growth Management Area is experiencing rapid urbanization, especially with housing developments.

Stormwater within this basin flows generally from north to south, with runoff ultimately being captured by the Larimer and Weld Canal. During large storm events, runoff spills into Lower Cooper Slough from the Larimer and Weld Canal. 

Located on the west side of the basin, the No. 8 Ditch runs north to south and is a primary conveyance of stormwater to the Larimer and Weld Canal. When the canal exceeds capacity, stormwater spills out of the ditch to the southeast combining with runoff from the north, often overtopping the Colorado and Southern Railroad and into the Larimer and Weld Canal.

Basin Stormwater Master Planning#

The original stormwater master plan for the Upper Cooper Slough Basin was prepared in 1981 as part of the Boxelder/Cooper Slough watershed. Since then, there have been several updates to the plan and a comprehensive update to the basin Selected Plan of Improvements is currently underway in 2020. 

Learn More about Upper Cooper Slough Master Planning

Explore the Upper Cooper Slough Basin#

Farmland west of Anheuser-Busch Plant

Farmland west of Anheuser-Busch Plant

No.8 Ditch near Richards Lake Road

No.8 Ditch near Richards Lake Road

Did You Know?

Fort Collins Utilities monitors water quality in our water sources, treated drinking water and treated water returned to the environment.

Insulating and air sealing the walls and roof keeps heat and/or cool air inside your home.

Turning off printers, copiers, coffee machines and other equipment at end of day saves energy.