DISCOVERY CORRIDOR WASTEWATER TRANSMISSION SYSTEM

Construction Photos

DCWTS Phase 1 is complete and has been conveying wastewater from Ridgefield's Interstate 5 junction area to the Salmon Creek Treatment Plan since February 2016. The project was completed on time and on budget. 

Ridgefield Junction

  • Pioneer Street Extension Project (COMPLETE)
  • Pioneer Street Paving Project (COMPLETE)
  • South Junction Gravity Trunk (COMPLETE)
  • Junction Pump Station removal (COMPLETE)
  • Pioneer Canyon Pump Station (COMPLETE)

Interstate 5 Median Pipeline Construction (COMPLETE)

Neil Kimsey Regional Pump Station (COMPLETE)

Northbound Rest Area Pipeline & NE 209th St Pipeline (COMPLETE)

Northbound Rest Area Pump Station (COMPLETE)

Southbound Rest Area Pump Station and Pipeline (COMPLETE)

NE Union Road Pipeline (COMPLETE)

NE 10th Avenue Pipeline (COMPLETE)

NE 20th Avenue Pipeline (COMPLETE)

NE 20th Avenue and NE 155th Street Intersection (COMPLETE)

Legacy Pump Station (COMPLETE)

System Commissioning (COMPLETE)

After more than a decade of planning and two years of construction, this major project connecting Ridgefield junction to the Salmon Creek Treatment Plant has been successfully completed on time and on budget.

Project Overview

The Discovery Corridor Wastewater Transmission System (DCWTS) is a 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 (SCWMS).

Phase 1 of the project, which includes a new wastewater conveyance pipeline to connect the City of Ridgefield’s Interstate 5 Junction area to the Salmon Creek Treatment Plant, has been successfully completed. Construction on the pipeline began in June 2014 and was completed late 2015, with system commissioning extending into early 2016. A detailed view of the alignment is available on the maps page.

The DCWTS Phase 1 project was constructed by Tapani Inc., a Battle Ground based company. The project was designed by a consultant team led by Otak Inc. CH2M HILL provided program management and construction management services.

Supporting Development

DCWTS is essential to supporting continued growth in the region. Connecting to the Salmon Creek Treatment Plant increases Ridgefield’s wastewater capacity. This enables economic development to occur, which is forecasted to bring thousands of new jobs to Ridgefield.

Ensuring Low, Consistent Rates

This project is a major part of the District’s continuing efforts to provide Ridgefield residents and businesses with efficient, high-quality sewer service at the lowest possible cost. Prior to joining the District in 2014, sewer bills in Ridgefield had been steadily climbing and were forecasted to continue to rise. Since then, rates have remained stable and are consistent with average sewer rates in western Washington, according to data from the Association of Washington Cities.

Expanding the District’s service area in Ridgefield provides rate support for all customers, helping ensure low and consistent rates into the future.

DCWTS is essential to supporting continued growth in the region. Connecting to the Salmon Creek Treatment Plant increases Ridgefield’s wastewater capacity. This enables economic development to occur, which is forecasted to bring thousands of new jobs to Ridgefield. DCWTS is essential to supporting continued growth in the region. Connecting to the Salmon Creek Treatment Plant increases Ridgefield’s wastewater capacity. This enables economic development to occur, which is forecasted to bring thousands of new jobs to Ridgefield.

Catalyst Award

In recognition of the DCWTS project as an important stimulus for development in our region, the Vancouver Business Journal honored the project with its inaugural Catalyst Award in July 2015.

District Board Vice President Neil Kimsey said, “This is a tremendous validation of years of hard work by many leaders at the state and local level. It confirms we are making the right investment in the right location at the right time to move the needle on economic opportunity for our community.”