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Posted on: February 5, 2024

Construction Update: How Many Miles of Pipeline Installed So Far?

Pipeline Installation

We’re more than one year into construction on the East County Advanced Water Purification Program. Three packages are in construction while two are in design.

The entire East County AWP Project includes more than 30 miles of wastewater and purified water pipelines. Community impacts from construction include lane closures during work hours, no parking areas and construction equipment noise and presence.

Just north of Santee Lakes, concrete work is ongoing on the advanced water purification, water recycling and solids handling facilities. Roughly 32,000 cubic yards of concrete has been poured, marking more than 60% of the total concrete that will be used at this site. Once complete, it’ll be enough concrete to fill 16 Olympic-sized swimming pools. The Visitor’s Center is also taking shape with vertical construction that began in mid-December of 2023.

The pipeline to transport purified water from the East County AWP facility to Lake Jennings will run more than 10 miles. Roughly 2.9 miles of that has been installed on Mast Boulevard in Santee in addition to Lake Jennings Park Road in Lakeside.  

The roughly 7 total miles of pipelines that connect AWP to East Mission Gorge Pump Station are also being installed. So far, nearly 60% of the 2.3 miles of open cut construction on wastewater pipeline has been installed with that work ongoing on Fanita Parkway and north of Ganley. The horizontal directional drilling portion of pipeline that also makes up part of the 7 total miles is in construction, but the pipelines have not yet been installed. 

The remaining 17+ miles of pipeline on this project are expected to begin construction in summer 2024. The regional brine wastewater pipeline from East Mission Gorge Force Main (EMGFM) to the City of San Diego sewer includes new and rehabbed pipelines. Construction may have a future impact on pedestrian and vehicle traffic at Mission Trails Regional Park. 

The final piece of the project is an energy recovery system. It is currently in the conceptual project development phase with construction slated to begin in 2026. Once complete, it’ll produce up to 3 megawatts of renewable energy generated from digester biogas and organic waste. This will supply up to 60% of package 1’s electricity, saving ratepayers money.

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