Fish Passage

Project Highlights

  • Built ladder to assist fish over existing dam

Project Overview

This Colorado Springs Utilities (CSU) project located in Fountain Creek in Fountain, Colorado was to build a fish ladder to help a threatened species of fish make the trip over the existing dam structure. It was difficult to create a mold of what CSU was wanting, so a test section was built, part precast and part hand built (with rocks/boulders). Once CSU agreed to the size/shape, our supplier set out to create rubber molds and used them in the ladder section forms. It was a long process that required extensive communication between Wildcat, CSU and Wildcat’s supplier. Since this was a new concept, Wildcat was constantly making design changes, while continuously working with CSU to make the design constructible. Our crews also had to work within the volatile Cottonwood Creek, getting completely washed out at one point and wiping away five days’ worth of wall forms. The forms were reconstructed in two and a half days rather than the original five-day duration to stay on schedule. The ladder was constructed of a cast-in place foundation on top of nine 18” caissons. After the foundation walls were built, the precast ladder section was anchored to the walls, thus creating a ladder passage for the fish to climb over the dam.



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