Wetlands Construction

This project consisted of constructing two equalization ponds, two vertical flow bed cells and one vegetated submerged bed cell. It included 38,000 CY of topsoil stripping, 42,600 CY of rock excavation and placement in controlled fills, and 99,000 CY of onsite cuts to controlled fills and importing of 335,646 CY of Gypsum from onsite gypsum landfill. After the initial cell construction 1,000,000 SF of HDPE Liner was installed, along with 25,000 LF of HDPE piping within the cells. Project also included 145,000 CY of clay liner material, interior clay berm construction, and protective covers for the project. Once all the piping and liners were installed we started placing 151,000 CY of a dirt/sand mix, 85,000 Tons of aggregate, 41,500 CY of tier 1 soil and 16,913 CY of sand to complete the cells to final grades. There was also another 15,000 LF of “out of cell” HDPE pipe installed. Phase II included a 36’ x 50’ metal building to house the electrical, pumps, & piping to send water to the various cells. This project expended 150,000 man-hours with no safety incidents and was completed on time. The project won EEI’s 2014 Edison Award, Power Plant Magazine’s 2014 Water Award and ENR’s 2015 Best Projects Award.