March 8, 2021

Poudre River Drop Structure Earns 2020 H2O Project Award for Northern Water

The Colorado Contractors Association has chosen the Poudre River Drop Structure as an award recipient in the category of Open Flow Concrete Structure under $6 million as part of the 2020 H2O Awards Program. Considered in this category were infrastructure projects involving drop structures, weirs, etc. Contracting firm Zak Dirt Inc. and Lead Engineer Alden Research Laboratory Inc. will also receive awards for their work on the project. 

Originally constructed between 1950 and 1951, the Poudre River Drop Structure on the Hansen Feeder Canal was in poor condition and included multiple structural defects that required replacement. Construction also included replacement of the chute and stilling pool on the bifurcation structure. During demolition of the spillway chute, a large void was discovered below the concrete slab. The identification of this void triggered additional investigations of the infrastructure surrounding the Poudre River Drop Structure. Further investigations of the flume section and stilling basin sections that were left in place showed no indication of foundation problems. 

Construction was conducted from November 2019 to March 2020. This structure at the north end of the Hansen Supply Canal is a key part of the infrastructure that delivers water from Horsetooth Reservoir into the Poudre River just northwest of Bellvue.

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