Stillwater Dam and Reservoir
Scope: Complete turnkey general contractor for the design build repair of a 25 surface acre reservoir in Douglas County, Colorado. HEI Civil in conjunction with J.A. Cesare & Associates analyzed several lining options including clay, PVC, sodium and calcium bentonite, and chemical soil treatments. Based on the design and soil considerations, PVC lining was determined to be the best performing. The scope included: dewatering; 1,500 LF of under-drains; 7,000 LF of methane gas vents; 35,000 CYS of muck removal; stabilization; the installation of 1,080,000 SF of 20 mill PVC liner; and 60,000 CYS of liner excavation and lining cover replacement. Job was turnkey including engineering through completion in four and one half months.