East County Advanced Water Program Archives

Construction begins soon on the new East County AWP energy recovery system, which will provide up to 30% of the project’s energy needs, saving the operators and ratepayers money. Photo: East County AWP

East County AWP Reports Progress, Hosts Outreach Event Jan. 17

January 13, 2026/in Facilities & Operations, News /by Gayle Falkenthal

Construction is progressing at the various project sites for the East County Advanced Water Purification Program. The past year saw a number of accomplishments, bringing the initiative one step closer to the finish line.

Watch the latest East County AWP video presentation.

The East County AWP Outreach team will kick off 2026 with a pop-up event for the public at Mission Trails Regional Park on Saturday, January 17, from 8 a.m. to 11 a.m.

Representatives will answer questions and share information about the pipeline work underway within Mission Trails Regional Park, including rehabilitation of an existing sewer pipeline, and installation of a new nine-mile residuals pipeline along Father Junipero Serra Trail within the park. Visit the project’s website for more details.

Work to install a temporary sewer bypass pipeline is complete, allowing work to continue during rainy months without risking a sewer spill and protecting wildlife and waterways.

Education Center Nears Completion

The lights are on at the East County AWP’s Education Building, which also houses administrative offices and a new laboratory. Photo: East County AWP

The new Education Center building, which will also house the administrative offices and a brand-new laboratory, is now 90% complete. San Diego Gas and Electric finished its work on the new treatment facility’s main electrical room, and power is now available for its operations. With electricity in place, the team is gearing up for the next milestone: installing the East County AWP sign outside the building.

Each digester can store up to 1.4 million gallons, and stands 46 feet high and measures 75 feet in diameter. Photo: East County AWP

Next, construction will get underway on the energy recovery system. Located north of the Education Center, Anaergia is working on the final design, with construction scheduled this winter. The methane produced by three digesters will be captured and used to generate both heating and electricity. The energy recovery system will provide up to 30% of the project’s energy needs, saving the operators and ratepayers money.

Crews are preparing for the installation of the final 3,500 feet of 36-inch wastewater pipeline. Work is active at the East Mission Gorge Pump Station and just south of Lake One at Santee Lakes. This segment is set to be completed this summer.

The East County AWP successfully secured two critical water discharge permits from the San Diego Regional Water Control Board, a significant operational milestone.

Mast Boulevard Construction Progress

Construction work is complete and Mast Boulevard from Fanita Parkway to Vomac Road is now restored. Photo: East County AWP

Mast Boulevard from Fanita Parkway to Vomac Road is a whole lot smoother after completion of final paving and striping work.

Crews are continuing work on Mast Boulevard from Vomac Road to W. Hartland Circle and are expected to wrap up by mid-to-late February. There is a 24-hour temporary closure of the second westbound lane near the work area. Expect paving and striping after these repairs are complete.

Habitat Restoration Restores Native Plants

Native plants are being reintroduced after construction has been completed in several areas including at Lake Jennings. Photo: East County AWP

As part of ongoing restoration following the installation of purified and wastewater pipelines, new plantings were installed last month around Lake Jennings, the Historic Flume Trail, El Monte Road, Laurel Canyon Road, and the end of Mast Boulevard.

These plants are native to San Diego and the surrounding area. They include California sagebrush, San Diego County sunflower, bush sunflower, California buckwheat, laurel sumac, lemonade berry, and spiny redberry.

Planting is also being done north of Ganley Road, and hydroseeding near the East Mission Gorge Pump Station and along Fanita Parkway will bring a more vibrant landscape to East County for years to come.

Overnight Work Continues Through February

Overnight work on a wastewater pipeline continues along Fairmount Avenue between Twain Avenue and Mission Gorge Road in San Diego between 8:30 p.m. and 5:30 a.m., Monday through Thursday. Noise and bright lights, along with road and lane closures, may affect traffic and nearby residents and businesses. Home access will be maintained at all times. Work should be complete at the end of February.

Interactive Map Helps Residents Stay Updated On Program Progress

The East County Advanced Water Program made significant progress in 2025.

When completed, water from this project will provide potable water to customers in Padre Dam Municipal Water District, Helix Water District, and Lakeside Water District service areas, and the northern portion of the Otay Water District.

With construction in multiple locations throughout east county, the Program’s interactive map offers a useful tool for residents and businesses to track where work is happening. The map is updated regularly and accessible 24/7 through the EastCountyAWP.com website. Information is also available via social media at @eastcountyawp

The East County AWP construction team is working to install a 28-inch bypass pipeline along Mission Gorge Road. It is 20,500 linear feet, or about 3.9 miles long. Photo: East County AWP

Construction Heats Up This Summer On East County AWP

August 13, 2025/in Facilities & Operations, News, Supply & Demand /by Gayle Falkenthal

Summer 2025 marks the third year of construction on the East County Advanced Water Purification Program facilities in Santee.

Progress on the East County Advanced Water Purification Program (East County AWP) continues on schedule at multiple East County locations, with significant steps forward reached as the project works its way toward completion.

The last piece of purified water pipeline was installed at Riverside Drive and Valle Vista Road in Lakeside. Photo: East County AWP

A major project milestone was reached in June. Purified water pipeline construction is officially complete. The final 20-foot piece of the pipeline was installed in Lakeside last month.

Since construction began in 2022, just over 51,000 linear feet of purified water pipeline has been installed. This 10-mile pipeline will transport purified water from the East County AWP Facility in Santee to Lake Jennings. Restoration and roadway paving is wrapping up this portion of the project

See a brief video update on the East County AWP progress here.

Mission Trails Regional Park Closures

Visitors to Mission Trails Regional Park may have seen the installation of a project bypass pipeline along the Father Junipero Serra Trail. This bypass pipeline serves to protect Mission Trails Regional Park against sewer spills once construction is underway to rehabilitate a sewer pipeline and install a new residuals pipeline.

Temporary closure of trailheads in Mission Trails Regional Park will take place through summer 2028. Photo: East County AWP

The 28-inch bypass pipeline is being installed along the entire 2.6 mile stretch of the trail with crews working east to west, fusing the pipeline sections together and undergrounding it when they reach intersections and trailheads.

The project requires the temporary closure of trailheads for up to two to three-day periods from 7 a.m. to 3:30 p.m.

It has also resulted in a long-term closure of the Father Junipero Serra Trail to all vehicles from the gate near the Visitor Center to the Old Mission Dam parking lot. This closure will last through summer 2028. The trail will remain open to pedestrians and bicyclists.

Overnight Work Underway At Santee Lakes

Overnight work is underway at Santee Lakes for the East County AWP. Photo: East County AWP

Overnight work on the east side of Santee Lakes is now underway. Crews are working at various locations on the east road from the roundabout near the park entrance on Fanita Parkway up to the East County Advanced Water Treatment Facility, just north of the lakes.

A 20-inch sludge line is being installed using a trenchless construction method called sliplining which may result in noise and bright lights for nearby neighbors. This overnight work is expected to be completed by the end of November 2025.

Work will take place during the following days and hours:

Monday night to Thursday morning from 7 pm. to 6 a.m.

Thursday night to Saturday morning from 7 p.m. to 5:30 a.m.

West Side of Santee Lakes Reopens For Summer

The west side of Santee Lakes is now reopened for recreation. Photo: East County AWP

Great news for Santee Lakes visitors. The west road where wastewater and brine pipelines were being installed has been reopened. Pedestrians, bicyclists and cars are able to use the roadway following the completion of this pipeline work, marking another project milestone.

Interactive Map Keeps Residents Updated On Progress

When completed, water from this project will provide potable water to customers in Padre Dam Municipal Water District, Helix Water District, and Lakeside Water District service areas, and the northern portion of the Otay Water District.

With construction in multiple locations throughout east county, the Program’s interactive map offers a useful tool for residents and businesses to track where work is happening. The map is updated regularly and accessible 24/7 through the EastCountyAWP.com website. Information is also available via social media at @eastcountyawp

As soon as 2026, the East County Advanced Water Program will deliver water to the faucets of customers. Photo: East County AWP milestone

East County Advanced Water Program Hits Multiple Milestones

March 8, 2024/in News, Supply & Demand /by Gayle Falkenthal

Work on the East County Advanced Water Purification Program facilities and pipelines reached multiple milestones at the start of 2024, and construction continues on schedule at multiple East County locations through 2025. As soon as 2026, the AWP will deliver water to the faucets of customers in the Padre Dam Municipal Water District, Helix Water District, Lakeside Water District service areas, and the northern portion of the Otay Water District service area.

At the main construction site north of Santee Lakes, more than 60% of the concrete has been poured for the water recycling, solids handling, and advanced water purification facilities. Nearly 60% of the 2.3 total miles of open-cut construction on wastewater pipelines that make up the AWP Program are complete.

More than 60% of the concrete has been poured for the East County Advanced Water Program water recycling, solids handling and advanced water purification facilities. Photo: East County AWP

Construction also continues on Fanita Parkway, north of Ganley Road in Santee, and within Santee Lakes Recreational Preserve. Pipeline water testing is now underway on that installed pipeline.

Work on the pipelines for the East County Advanced Water Program is affecting access to the Santee Lakes Recreational Preserve, which remains open. Photo: East County AWP

In addition, pipeline work at Santee Lakes is occurring between Lakes 3 and 4. There is a road closure and no parking in some areas. The Kiwanis Playground at Lake 4 remains open and parking has been preserved for playground visitors.

“Roughly a year and a half ago, we started with a blank slate and since then, the Joint Powers Authority and its project partners have made significant achievements at each of the construction sites,” said Mark Niemiec, director of the East County AWP. “It’s during these ongoing activities within the community including at Santee Lakes that we really appreciate our neighbors’ patience and understanding.”

Pipeline undergrounding scheduled this spring

These new pipelines servicing the East County Advanced Water Program will soon be moved underground. Photo: East County AWP

The wastewater pipelines that will run from the East Mission Gorge Pump Station near State Route 52 to the first lake at Santee Lakes will soon be pulled underground. This trenchless construction method called “Horizontal Directional Drilling” minimizes the impacts to nearby waterways, including the San Diego River. The process takes an estimated 24 to 36 straight hours.

Elsewhere, Fanita Parkway will be temporarily closed for up to one week in March between Ganley Road and Lake Canyon Road to allow for paving on both sides of the street. Residents will see detour signs prior to the closure. The road closure will occur during the day from 7 a.m. to 5 p.m.

Purified water pipeline construction is continuing west on Mast Boulevard in Santee, as well as west on Mapleview Street in Lakeside and from Laurel Canyon Road to El Monte Road. Lane closures can be expected.

Residents and commuters in Santee and Lakeside can monitor road closures on the East County AWP website. Photo: East County AWP

Construction on the 23,000-square-foot Visitors Center is in progress and will be completed by the end of 2025. It will house administrative offices, the operation control center, a testing laboratory, and a community room. The steel beam installation, including 66 columns and 100 beams, will use 350,000 pounds of U.S. steel.

The Flume Trail at Lake Jennings is officially back open following a 10-month closure for purified pipeline construction. The trail will close again during the summer for a couple of months to allow for additional pipeline construction near the shoreline.

The Flume Trail at Lake Jennings is officially back open following a 10-month closure. It will close again for additional construction later this summer. Photo: East County AWP

When complete, the East County AWP Program will be able to create up to 11.5 million gallons of purified water per day, which is enough to serve an estimated 400,000 people, or roughly 30% of East San Diego County’s water supply.

The East County AWP Program includes construction of the following:

When operational, the East County AWP will be able to create up to 11.5 million gallons of purified water per day which is enough to serve roughly 30% of East San Diego County’s water supply. Photo: East County AWP

Water recycling facility treating 16 million gallons per day (MGD) of wastewater.
Advanced water purification facility treating and purifying 11.5 MGD.
Purified water pipeline transporting purified water 10 miles to Lake Jennings.
Wastewater and residual pipelines. Each segment is three miles long.
East Mission Gorge Pump Station (retrofitted) and City of San Diego partnership of regional brine and wastewater pipelines traveling from the pump station in Santee to the City of San Diego’s sewer line in Mission Valley.
Energy recovery system creating three megawatts of renewable energy.

To stay up-to-date with project schedules, community impacts and work descriptions, check the East County Advanced Water Purification Program’s interactive map on www.eastcountyawp.com or visit @eastcountyawp on social media

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