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Construction of the new Hauck Mesa Storage Reservoir in North San Diego County was completed in June 2023.

Award-Winning Hauck Mesa Storage Reservoir Project

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The award-winning Hauck Mesa Storage Reservoir enhances drinking water supply reliability and operational efficiency for the region. Construction was completed June 23 on the San Diego County Water Authority project in North San Diego County.

Work started in March 2021 with the demolition of an out-of-service steel tank.

Project work included construction of an underground isolation vault and flow control facility, in addition to a new 2.1 million-gallon water tank connected to the Valley Center Pipeline.

Hauck Mesa Storage Reservoir project-water infrastructure

The project included construction of the water tank, flow control facility, and valve vault; paving of the project site and access road; and installation of new security fencing. Photo: San Diego County Water Authority

Improved operational flexibility

Operational flexibility is increased at Hauck Mesa by balancing the flow of treated water between the agency’s First and Second Aqueducts and by helping to maintain water deliveries if power supplies are interrupted. The new storage reservoir enhances the Water Authority’s ability to provide reliable and efficient deliveries of treated water to member agencies.

The walls of the new tank are about 60 feet tall, stained a forest green color to blend in with the natural landscape, and made of prestressed, or wire wrapped, concrete.

“The prestressed technology will maintain the tank walls in permanent compression, allowing the tank to accommodate seismic events while remaining watertight,” said Water Authority Construction Manager Emma Ward-McNally.

The project reached a major milestone in April 2022 when crews poured the concrete roof of the new prestressed concrete water tank. The entire system, including the new tank and flow control facility, was put into service in May 2023.

Hauck Mesa Storage Reservoir project-concrete tower-water infrastructure

In April 2022, crews worked to pour the concrete roof of the new Hauck Mesa Storage Reservoir in North San Diego County. Photo: San Diego County Water Authority

Award-winning Hauck Mesa Storage Reservoir project

The Hauck Mesa Storage Reservoir project has received two awards: The 2023 Honor Award from the American Public Works Association for Utilities in the $6 – $25 million category and was a joint winner of the 2023 Outstanding Water Project from the American Society of Civil Engineers.

Hauck Mesa Reservoir Storage project-water infrastructure-award winning

Water Authority Construction Manager Emma Ward-McNally (seated left) receives APWA award for the Hauck Mesa Storage Reservoir Project. Photo: San Diego County Water Authority/APWA

Strategic infrastructure improvements by the Water Authority and its member agencies are part of the regional effort to ensure continued delivery of water to support the region’s $268 billion economy and the quality of life for 3.3 million residents. As part of the asset management program, it is critical to actively replace and repair the Water Authority’s assets, which include pipes, valves, facilities, equipment, and other infrastructure.

Collaboration with Valley Center Municipal Water District

During construction, the Water Authority worked closely with the Valley Center community, Valley Center Municipal Water District, and nearby homeowners to minimize short-term construction impacts during the project.

The Water Authority operates and maintains a regional water delivery system capable of delivering 900 million gallons of water per day. Building and operating the large-scale infrastructure required to meet the region’s water needs now and in the future requires careful planning and technical expertise. The Water Authority uses a sophisticated approach to cost-effectively build, operate, maintain and secure its water facilities as an integrated system.

(Editor’s note: The Valley Center Municipal Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across the San Diego County region.) 

Trolls Under the Bridge: Century Old Dam Faces Bleak Future

/in , /by /Escondido Times-Advocateby Jeffrey Epp

Every day, more than 300,000 cars and trucks thunder across the wide concrete bridge which carries Interstate 15 over Lake Hodges south of Escondido. Perhaps just a handful of these daily commuters or big rig drivers are fully aware of what lies below. Under this bridge, an aluminum boat and fisherman could be bobbing among the treetops. On another day, it might be the peaceful scene of a mule deer lying perfectly still on dry ground among the reeds.

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Escondido Incubator Could Revive North County’s Ag Industry. UC Could Be Partner

/in , , /by /The San Diego Union-Tribuneby Joe Tash

A vacant, city-owned industrial building could become a hub for new businesses in the field of agricultural technology under a proposal now being explored by Escondido officials.

The idea is to turn the empty building at 455 N. Quince St. — most recently used as a mattress factory and warehouse — into an incubator where researchers, entrepreneurs and venture capitalists could come together to hatch new companies that would serve North County’s agriculture industry.

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Hauck Mesa Storage Reservoir

Hauck Mesa Storage Reservoir Moving to Completion

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The San Diego County Water Authority Hauck Mesa Storage Reservoir project in North San Diego County reached a major milestone in late April when crews poured the concrete roof of the new prestressed concrete water tank. The major construction project, which began in March 2021, will improve drinking water supply reliability for the county.

The project began with the demolition of an abandoned steel tank, and includes construction of an isolation vault and an underground flow control facility, in addition to the new 2.1 million-gallon water tank connected to the Valley Center Pipeline. The project is expected to be completed by November 2022.

Improved flexibility with Hauck Mesa Reservoir

The new Hauck Mesa Storage Reservoir will increase operational flexibility by balancing the flow of treated water between the agency’s first and second aqueducts as well as ensure water deliveries can be maintained even if power supplies are interrupted.

The walls of the new tank are about 60 feet tall, will be stained a forest green color to blend in with the natural landscape, and are made of prestressed, or wire wrapped, concrete. Construction Manager Emma Ward-McNally said that the prestressed technology “will maintain the tank walls in permanent compression, allowing the tank to accommodate seismic events while remaining watertight.”

Next steps for the project include the wire wrapping of the water tank, applying green-tinted shotcrete to the tank walls, installation of mechanical components within the flow control facility, system commissioning, and paving of the project site and access road.

Asset management

Strategic infrastructure improvements by the Water Authority and its 24 member agencies are part of the regional effort to ensure continued delivery of water to support the region’s $240 billion economy and the quality of life for 3.3 million residents. As part of the asset management program, it is critical to actively replace and repair the Water Authority’s assets, which include pipes, valves, facilities, equipment, and other infrastructure.

The Water Authority will continue to work closely with the Valley Center community, Valley Center Municipal Water District, and nearby homeowners to minimize short-term construction impacts.

Replacement of Lake Wohlford Dam is ‘Shovel Ready’

/in , , , /by /The San Diego Union-Tribuneby Joe Tash

The city of Escondido is moving forward with plans to replace the Lake Wohlford dam, a structure built of earth and rock that has stood at its present location since 1895.

Lake Wohlford is about 5 miles northeast of downtown Escondido, just beyond city limits in the unincorporated area of San Diego County, and the dam is owned by the city. The lake has long served the city both as a recreational asset for boaters and fishing enthusiasts, and as an emergency storage reservoir to supply drinking water in case of a drought.

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Escondido Strengthens Water Treatment, Agriculture, and Recycling Industries

/in , , /by /Kusi News

Escondido, which means “hidden” in Spanish, is working to further improve a few industries in one of the San Diego County’s oldest cities.

The City of Escondido is using a reverse osmosis plant to clean and treat water that will get sent to agriculture in San Diego’s north county.

They hope to continue treating the water so that in the future it becomes potable.

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Wastewater Treatment Operator Featured As ‘Water Utility Hero’

/in , , /by /Times-Advocate Escondido

Last week Escondido’s Wastewater Treatment Plant Operator, Carrie Selby was featured as the Water Utility Hero of the Week by the San Diego County Water Authority SDCWA. Shelby was interviewed for the Water News Network and talked about her career and work life during the pandemic.

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East County AWP-Water Supply Projects-Water Recycling

San Diego Local Water Supply Projects Get Big Funding Boost

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Two major water projects in San Diego County this week received a major financial boost to enhance the region’s water supply. The East County Advanced Water Purification Project was approved for up to $91.8 million and a project in the City of Escondido was approved for up to $23.4 million.

The San Diego County Water Authority has helped secure nearly $470 million for local supply projects in the past several months in collaboration with member agencies, including the total of $115 million for the East County and City of Escondido projects. Both projects will increase local water supply reliability and reduce future demands on imported water supplies.

Collaboration on water supply projects

On Tuesday, the Metropolitan Water District of Southern California’s Board of Directors approved entering into funding agreements from its Local Resources Program for both projects. The Water Authority and its member agencies are able to participate in the Local Resources Program after a final court ruling found MWD had illegally barred the Water Authority from receiving money from MWD’s local water supply program, even though the Water Authority was forced to pay for it.

“Kudos to our member agencies for their strong applications and to MWD’s Board of Directors for approving them,” said Water Authority Board Chair Jim Madaffer. “It is an affirmation of our ongoing efforts to collaborate with MWD and to address shared challenges.”

Potable reuse project in East San Diego County

The East County AWP will be one of the first potable reuse projects in California to use new reservoir augmentation regulations. The program will meet up to 30% of East County’s drinking water demands, almost 13,000 acre-feet of water per year, and eliminate the discharge of 15 million gallons of partially treated wastewater into the Pacific Ocean.

The AWP uses four advanced water purification steps to produce water that is near-distilled in quality. After treatment, purified water will be blended with water in Lake Jennings and treated again at the R.M. Levy Water Treatment Plant before being distributed as drinking water.

This program is a collaborative partnership between Padre Dam Municipal Water District, the County of San Diego, the City of El Cajon and Helix Water District.

Advanced water recycling in Escondido

The Membrane Filtration Reverse Osmosis Facility in Escondido would provide up to 3,280 acre-feet per year of advanced treated recycled water to irrigate farms.

The project includes the construction of an advanced recycled water treatment facility with microfiltration and reverse osmosis, new pipelines, and a storage and blending tank to convey water for agricultural irrigation. Source water for the project is treated recycled water from the Hale Avenue Resource Recovery Facility. Escondido will own and operate the project and plans to deliver water by 2023.

Regional water supply projects reduce reliance on imported water

In the past several months, the Water Authority has helped member agencies secure three other Local Resources Program agreements to fund water supply projects that increase local supply and reduce reliance on imported water. Those projects are:

  • $23.6 million for the Fallbrook Public Utilities District’s Fallbrook Groundwater Desalter Project
  • $42.7 million for the City of Oceanside Pure Water & Recycled Water Expansion Phase I Project
  • $285.6 million for the City of San Diego’s Pure Water North City Project

Deputy Mayor to Serve on San Diego County Water Authority

/in , , /by /Times-Advocate Escondido

On Wednesday, May 27 the San Diego County Water Authority welcomed Escondido Deputy Mayor Consuelo Martinez as its newest board member. The deputy mayor was sworn into the role via a Zoom call from her office.

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Escondido Employee Named California Laboratory Person of the Year

/in , , /by /Times-Advocate Escondido

The California Water Environment Association has named of Escondido Water Quality Lab Associate Chemist, Oyuna Jenkins as their Laboratory Person of the Year. Jenkins plays a key role in the lab’s safety processes, which ensures a safe and reliable water supply for City customers. 

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