GWR System Unit 1 Pipeline

The GWR Pipeline Unit 1 project is a part of the Groundwater Replenishment (GWR) System, which is a jointly funded project of the Orange County Water District and Orange County Sanitation District. The GWR System is a water supply project designed to ultimately reuse approximately 140,000 acre-feet per year (afy) of advanced recycled water.

Butier Engineering, Inc. provided construction management and inspection services for 5.5 miles of 78-inch and 54-inch CML&C pipeline of this project. This project involved installation of approximately 31,000 LF of 78-inch, 72-inch, and 66-inch diameter cement mortar lined and coated (CML&C) steel pipe with each joint field-welded. The project also included installation of approximately 900 feet of 54-inch parallel Santa Ana River Discharge pipeline from the Advanced Water Treatment Facility to the Santa Ana River. This unit extends from the AWTF/OCSD Plant No. 1 site to just north of 17th Street in Santa Ana and includes tunnels at each street and freeway under crossing.