Project Location: Firestone, Colorado
This was a design-build water storage project with five separate gravel pits, each with individual slurry walls, which have passed the State of Colorado Certified Leak Test.
After mining is completed on Pond E, Hall-Irwin will construct a clay liner utilizing the bottom shale, after which this reservoir will also go through the State of Colorado Certified Leak Test.
The four ponds (A,B,C,& D) work in conjunction with each other through a series of interconnects, inlet structures (to divert water via two separate irrigation canals), and a pump station in Pond A. All of this allows for the largest amount of water conveyance both in and out of the reservoirs. The cut-off walls that surround these four below-grade reservoirs total 23,150 LF. The soil Bentonite slurry backfill was keyed into bedrock with a maximum depth of 32 FT creating approximately 4,500 acre feet of water storage.