GWRS Pipeline Inspection Project Concludes

Sandy Scott-Roberts Inspects PipelineThe District routinely monitors and inspects its equipment and infrastructure to sustain the safety and quality of its operations. OCWD has recently concluded a thorough inspection of the Groundwater Replenishment System (GWRS) pipeline. OCWD staff, along with Jamison Engineering, visually inspected the interior of the 13.6-mile pipeline that delivers GWRS water to the spreading basins in Anaheim.

The GWRS pipeline was previously inspected in 2014 and early signs of concrete mortar lining deterioration were detected and repaired at that time. During the current inspection, all previous repair sites were found to be in good condition. Since deterioration of the mortar lining exists, OCWD staff will inspect and repair, as necessary, on an annual basis to prevent further deterioration.

This thorough inspection provides critical data to monitor the health of this valuable asset. Since water can’t flow through the pipeline when implementing this project, it was planned to coincide with the temporary shut-down of the GWRS plant.

The GWRS, the world’s largest advanced water purification system for indirect potable reuse, produces up to 100 million gallons of water per day (MGD); approximately 30 MGD is sent to the barrier to protect the basin from seawater intrusion and the remainder is sent via the pipeline to spreading basins in Anaheim where it percolates into the groundwater basin.

Photo: Principal Engineer Sandy Scott-Roberts inspects GWRS pipeline.