August 2016

The Discovery Corridor Wastewater Transmission System (DCWTS) is Clark Regional Wastewater District’s 20-year, multi-phase program to provide for the conveyance of wastewater from the Ridgefield Urban Growth Area to the Salmon Creek Wastewater Management System. This project increases Ridgefield’s wastewater capacity and supports future economic development and growth in our region.

Otak helped the City of Ridgefield study wastewater treatment and conveyance options for more than six years, including performing studies to determine the best route, projecting population and flow, and determining the best connection point in Ridgefield. We developed an engineering report that met Washington Department of Ecology standards, as well as 30 percent plans and a design report. Otak led the team that developed construction documents for Phase 1 of the DCWTS. This $25 million project includes upgrades to two pump stations, construction of two new pump stations, and construction of eight miles of a 14- to 16-inch force main. 

After more than a decade of planning and two years of construction, the first phase of this major project connecting Ridgefield junction to the Salmon Creek Treatment Plant held a grand opening on Wednesday! The event was well attended.

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