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Pure Water Oceanside-US EPA loan-Water Recycling

Pure Water Oceanside Recycling Project Gets $69 Million EPA Loan

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The Pure Water Oceanside project is getting a $69 million loan from the U.S. EPA that will finance nearly half of the project’s construction cost.

EPA officials announced the loan at an event today in Oceanside attended by federal, regional and local officials.

The innovative water reuse project will purify recycled water to create a new source of high-quality drinking water that is clean, safe, drought-proof and sustainable. It also will benefit the environment by reducing discharges into the Pacific Ocean. Construction and operation of the plant is expected to create 622 jobs.

Scheduled to be completed in 2022, Pure Water Oceanside will be the first operating advanced water purification facility in San Diego County. The project will provide more than 32% of the City of Oceanside’s water supply, or 3 to 5 million gallons per day.

Sustainability, drought-proof water supply

“The City of Oceanside is proud to be a leader in sustainability and water reliability,” said Oceanside Mayor Peter Weiss. “Pure Water Oceanside marks the next big step for our City as the project will safeguard against drought, reduce our dependence on imported water, and create an exceptionally pure drinking water supply.”

“I appreciate the U.S. EPA in their funding support as it is a critical aspect for Oceanside’s ability to continue to improve our local water supplies while minimizing our impact to our ratepayers,” said Weiss.

Loan supports infrastructure investments

“At the City of Oceanside, we are focused not only on today, but also are committed to planning for tomorrow to ensure future generations will have access to high-quality drinking water,” said Oceanside Water Utilities Director Cari Dale. “This loan will be instrumental in moving our Pure Water Oceanside project forward to completion and aligns with our long-term goal to have 50% of our city’s water supply be locally sourced by 2030.”

The Water Infrastructure Finance and Innovation Act (WIFIA) loan to help finance the Pure Water Oceanside Project comes at a critical time, as the federal government, EPA, and water industry work to offset the public health and financial impacts of COVID-19.

The Pure Water Oceanside project is estimated to cost $158 million, and the WIFIA loan will finance nearly half of that cost, according to the EPA. The remaining project funds will come from a combination of grants, water system revenue backed obligations, and system funds.

“EPA’s support for this project illustrates two agency priorities as we work to meet 21st century water demands — reusing the water that we have and revamping our nation’s water infrastructure,” said EPA Assistant Administrator for Water David Ross. “With WIFIA’s support, Pure Water Oceanside will be a landmark project as EPA looks to foster additional innovative water reuse strategies and infrastructure investments across the country.”

Pure Water Oceanside-EPA Loan-Water Recycling

“I am proud and excited for the City of Oceanside and everyone who has worked so hard on the Pure Water Oceanside project,” said Congressman Mike Levin, who represents north San Diego County. “Now more than ever, it’s critically important that we diversify our water supply. Thanks to Pure Water Oceanside, the City of Oceanside, and this EPA loan, we are one step closer to achieving that independence. This is an extraordinary milestone and will make a huge difference for countless families in North County.”

National Water Reuse Action Plan

The water reuse benefits of the project highlight commitments made under the National Water Reuse Action Plan—a collaborative effort and the first initiative of its magnitude aimed at strengthening the sustainability, security and resilience of our nation’s water resources. The Action Plan frames the business case that water reuse is a viable and growing means of supporting our economy and improving the availability of freshwater for farmers, industry, communities, and ecosystems.

“By improving water infrastructure, we are improving the quality of life and public health in our communities,” said EPA Pacific Southwest Regional Administrator John Busterud. “Through the WIFIA loan program, EPA is happy to support the Pure Water Oceanside Project in ensuring access to clean and safe drinking water for decades to come.”

Reservoir Keeper Viviana Castellon shared her expertise with citizens as part of the City’s #AskAnExpert series on Instagram. Photo: City of San Diego/Instagram

San Diegans #AskAnExpert Reservoir Recreation Questions

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Reservoir Keeper Viviana Castellon shared her expertise with citizens during the City of San Diego’s #AskAnExpert series on Instagram as part of the City’s community outreach to citizens. The City regularly offers the opportunity for the public to ask employees about its services including parks, libraries, streets, and water.

“We find that it’s a great way to get general information about City services to the public,” said Arian Collins, public information officer with the San Diego Public Utilities Department.

Castellon answered several questions about the recreation offered at the City’s lakes and reservoirs.

Can you rent boats at City of San Diego reservoirs?

Yes, the reservoirs do have boat rentals through the concessionaires. You can view the hours of operation and rentals fees online.

Social media outreach gives City of San Diego residents access to experts like Reservoir Keeper Viviana Castellano. Photo: City of San Diego/Instagram

Social media outreach gives City of San Diego residents access to experts like Reservoir Keeper Viviana Castellano. Photo: City of San Diego/Instagram

Is stand-up paddleboarding allowed at any City of San Diego reservoir?

Yes, Hodges Reservoir offers stand-up paddleboarding on Wednesday, Saturday, and Sunday from the beginning of February through the end of October.

Can you swim at City of San Diego reservoirs?

No. What are commonly referred to as the San Diego City lakes are actually impounding reservoirs that are part of the City’s municipal water-supply system. The State Water Resources Control Board approves the different recreational activities that can occur on our reservoirs and swimming is not included in our current domestic water supply recreational permit.

Can you water ski at the City of San Diego reservoirs?

Yes, San Vicente Reservoir offers water-skiing and wakeboarding from May through October Thursday through Sunday.

Residents who would like to keep up with the latest information about the City’s reservoirs and lakes as well as other City of San Diego services can learn more at the City of San Diego website, as well as follow the City’s Instagram account for more #AskAnExpert opportunities.

(L to R): Director DeAna Verbeke, Board President Mark Gracyk, Director and Parks, Land, Lakes and Garden Committee Chair Dan McMillan, Director and Parks, Land, Lakes and Garden Committee ViceChair Joel Scalzitti, and Director Kathleen Hedberg cut the ribbon for the new Lake Jennings Boat Dock on Monday, August 31. Photo: Helix Water District

New Lake Jennings Boat Dock Open

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A new floating boat dock at popular reservoir and recreation facility Lake Jennings was unveiled with a ribbon-cutting ceremony on August 31 and opened to the public for boating and fishing activities.

The dock is reinforced concrete encapsulating a solid polystyrene core, which makes the dock float. Numerous safety features include a nonskid concrete surface, enhanced security fencing and access gate, gangway handrails, and support posts to assist visitors as they enter and exit boats.

The new dock is replacing a wooden dock that, after 25 years, had reached the end of its useful life. Visitors use the dock to rent motorboats, rowboats, kayaks and paddleboats to explore the lake and catch fish.

Video of the new dock

New standard for future improvements at Lake Jennings

“Over the years, we have upgraded our campground facilities, installed new trails, and improved our recreation programs to make Lake Jennings a fantastic East County destination,” said Helix Water District board member and Parks, Land, Lakes and Garden Committee Vice-Chair Joel Scalzitti. “With our recent dock improvements, even more visitors can enjoy everything the lake has to offer.”

The modular dock is easily reconfigured and expanded and features a new, solar-powered dock house, lighting improvements for nighttime operations, shade structure, lockable kayak storage, and additional boat slips.

Visitors use the dock to rent motorboats, rowboats, kayaks and paddleboats to explore the lake and catch fish. The replacement dock is expected to last for generations to come. Photo: Helix Water District

Visitors can use the Lake Jennings boat dock to rent motorboats, rowboats, kayaks, and paddleboats to explore the lake. The replacement dock is expected to last for generations to come. Photo: Helix Water District

“This project is a long-term investment in our lake operations and the community,” said Helix Water District board member and Parks, Land, Lakes, and Garden Committee Chair Dan McMillan. “This is a high-quality dock and it sets the standard for future improvements at the lake.”

The district’s board is in the early stages of evaluating improvements of similar quality at the lake’s campground.

Lake Jennings is one of two reservoirs owned by Helix Water District. It has a water storage capacity of 9,790 acre-feet and is open to the public for boating, fishing, camping, and hiking.

The lake is currently open on Fridays from 3 p.m. to midnight for night fishing, and for fishing and day-use on Saturdays and Sundays from 6 a.m. to 3 p.m. The campground – which boasts full-hookup, partial-hookup, non-hookup, and tipi sites – is open daily and accepting reservations. Further information, including COVID-19 safety requirements for visitors, is available: www.lakejennings.org.

LG Sonic’s specific low power ultrasonic transmitters emit signals which are not harmful to people, fish, plants or other wildlife. Photo: Vallecitos Water District water quality

Vallecitos WD Uses Innovative Technology to Monitor Water Quality

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The Vallecitos Water District is known for its sustainable practices in water and wastewater treatment processes, without any compromise in water quality. The district is now using a new ultrasound technology to address water quality at the Stanley A. Mahr Reservoir with a reduced need for chemical treatment.

The Mahr Reservoir stores up to 54 million gallons of reclaimed water to be used later for irrigation. Photo: Vallecitos Water District

The Mahr Reservoir stores up to 54 million gallons of reclaimed water to be used later for irrigation. Photo: Vallecitos Water District

Mahr Reservoir was completed in 1981. Originally called La Costa Storage No. 1 Dam and Reservoir, it was renamed after the district’s original founder 35-year board member Stanley A. Mahr. It stores up to 54 million gallons of reclaimed water to be used later for irrigation. The district has contracts with the City of Carlsbad and Olivenhain Municipal Water District to provide water as needed, as much as five million gallons of recycled water daily.

Because the reservoir’s location receives intense sunlight with little rain, algal blooms can occur in the nutrient-rich recycled water. The most common method of treating algal blooms is with harmful chemicals. They are costly and labor-intensive.

The district instead uses technology developed by the international company LG Sonic, which provides a complete overview of the water quality allowing swift identification and treatment of algal blooms.

New ultrasound technology reduces cost and environmental harm

NOTE: Portions of this video were filmed in 2019, prior to the COVID-19 pandemic and any mandatory face covering requirements.

Every 10 minutes, an MPC Buoy in the Mahr Reservoir measures and monitors green and blue-green algae population, pH, turbidity, dissolved oxygen, and water temperature. The data is collected in real time and uploaded to a web-based software. The software uses the data to predict algal blooms three to ten days in advance.

The LG Sonic buoy can create a sound barrier in the top water layer, which affects the buoyancy of the algae, preventing it from rising up where it can absorb sunlight for photosynthesis to grow. Without sunlight and nutrients, algae cells sink to deeper water where they degrade due to natural bacteria and do not release toxins into the water.

With overall algae levels reduced by this technology, the need for chemical treatment is also reduced, allowing the Vallecitos Water District to provide high quality reclaimed water to its customers.

LG Sonic’s specific low power ultrasonic transmitters emit signals which are not harmful to people, fish, plants or other wildlife.

Divers lend a hand at Mahr Reservoir

Meadowlark Water Reclamation Facility Wastewater Treatment Plant Operator II Ivan Murguia monitors water quality. Photo: Vallecitos Water District

Meadowlark Water Reclamation Facility Wastewater Treatment Plant Operator II Ivan Murguia monitors water quality. Photo: Vallecitos Water District

After the initial installation, an unusual incident occurred. Electrical cords providing power to the reservoir’s water pumps became wrapped around the inlet/outlet pipes located underwater. Mahr’s algae meter needs water flow from the reservoir to be able to read the algae level.

Maintenance staff couldn’t untangle the power cords from above the water. Specialty divers were called in to address the problem. Vallecitos Pump and Motor Technician Dale Austin also had divers inspect pneumatic (air) and hydraulic (oil) lines to the motors (actuators) that open and close the inlet and outlet valves for leaks. Divers successfully untangled the electrical cords and they were secured to prevent future problems. Divers found no leaks on the lines.

 

 

 

Recreational activities such as fishing at Lower Otay Reservoir are continuing safely under new coronavirus safety protocols. Photo: City of San Diego reservoirs open

San Diego Reservoirs Open with Coronavirus Safety Guidelines

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All City of San Diego reservoirs previously closed in response to the coronavirus pandemic are now open to the public during regular business hours for walking, jogging, cycling, fishing and boating. Normal fishing and boating fees will apply.

“Overall everything is working well,” said Bryan Norris, the City’s reservoirs and recreation program manager.  “Several reservoirs are experiencing higher than normal visitation since the reopening.”

Available activities include walking, jogging, cycling, fishing and boating. Normal fishing and boating fees will apply. Photo: City of San Diego

Available activities include walking, jogging, cycling, fishing and boating. Normal fishing and boating fees will apply. Photo: City of San Diego

Reservoirs open, face masks, physical distancing required

The public is asked to observe COVID-19 preventative measures, including mandates requiring face coverings and physical distancing.  Bathrooms are scheduled to be cleaned regularly as part of San Diego County regulations. For more information go to: www.sandiego.gov/reservoirs-lakes.

Miramar, Murray, and Lower Otay Reservoirs reopened in mid-May. El Capitan Reservoir and Upper Otay Reservoir were next to reopen on June 6, followed by San Vicente Reservoir on June 13. Lake Hodges, Sutherland, and Barrett all opened in early July and remain open.

New safety and cleaning protocols first started with the May reopenings are continuing.

Lake Jennings offers its popular night fishing on August 7

Lake Jennings in Lakeside, operated by the Helix Water District, remains open for recreation, day use, and camping by family member groups only after reopening in June. Fishing and day use visitors must wear masks and adhere to physical distancing. The Bait and Tackle Shop is open with restrictions. See the complete list of current restrictions onsite at the Lake Jennings website.

The lake was stocked with 1,000 pounds of catfish in preparation for its popular Night Fishing event on Friday, August 7. Fishing enthusiasts of all ages may fish from the shoreline from 3 p.m. until midnight.  A valid California State Fishing License is required for anyone 16 years old and older.

The recreation side of the lake is open every Saturday and Sunday from 6 a.m. to 3 p.m., unless a night fishing event is taking place.

The campground is currently sold out this weekend, but campers can check for availability due to cancellations online at www.lakejennings.org. Only registered campers are permitted in the campground, no visitors or day use access is allowed.

Santee Lakes fishing report

Santee Lakes 2 and 4 were stocked on July 27 with 500 pounds of catfish each. The next scheduled fish stocking will take place Monday, August 10. Photo: Padre Dam MWD / Santee Lakes

Santee Lakes 2 and 4 were stocked on July 27 with 500 pounds of catfish each. The next scheduled fish stocking is August 10. Photo: Padre Dam Municipal Water District / Santee Lakes

The popular Santee Lakes reports the bass continue to bite on fishing lines using soft plastics, topwater frogs, and swimbait. Popular spots include the west side of Lake 5 and the southwest corner of Lake 4. Catfish are also biting on a mix of bait including mackerel, chicken liver, and mealworms. Catfish are biting on the east shore of Lake 4 and the south shore of Lake 2.

Santee Lakes has opened the 2021 reservation schedule for its popular campsites.

Padre Dam Municipal Water District built Santee Lakes to demonstrate the promise of water recycling. The 190-acre Santee Lakes Recreation Preserve is owned and operated by Padre Dam MWD and is entirely self‐sustaining, receiving no funds from water/sewer ratepayers or taxpayer subsidies.

The City of Poway is performing maintenance at Lake Poway, drawing the lake level down temporarily. Photo: City of Poway

Lake Poway Water Level Temporarily Reduced for Maintenance

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Lake Poway’s water level is lower today, but it isn’t due to the current heatwave. The lake is being temporarily reduced to complete a planned maintenance project to replace a transducer.

Lake Poway serves as the City of Poway’s main water storage reservoir, with a capacity to hold more than one billion gallons of water. A transducer measures the lake’s water level and remotely sends data to the city.

The city typically takes advantage of lower summer lake levels every year as part of a process to maintain the water quality and for maintenance.  Water drawn down from Lake Poway is sent to the Lester J. Berglund Water Treatment Plant for treatment. Replacement water is added back in from supplies the city purchases from the San Diego County Water Authority.

Drinking water is not being discarded. Instead, the City of Poway is moving drinking water into the delivery system for treatment, and holding back on replenishing the lake until the maintenance project is complete.

The work creates a bonus for San Diego County’s avid fishing fans.

“It’s not unusual for the water level to be down in the lake this time of year,” said Allie Margie, Recreation Supervisor at Lake Poway. “Our night fishing and catfish restocking schedule aren’t affected – and with less water and more fish in the lake, your chances of making a catch might be better than ever.”

Three billion gallons of drinking water safely treated annually

Lake Poway treats three billion gallons of drinking water annually. Photo: City of Poway

Lake Poway treats three billion gallons of drinking water annually. Photo: City of Poway

Poway operates a modern water treatment and distribution system. Lake Poway serves as a storage reservoir for imported water from both the Colorado River and Northern California.

Water flows through the Berglund Water Treatment Plant, where approximately three billion gallons of drinking water are treated every year for the citizens of Poway. Once treated, the drinking water enters a system of pipes, pump stations, reservoirs for delivery to customer’s homes and businesses.

Did you know?

  • The City of Poway maintains about 294 miles of water pipe.
  • There are approximately 2,345 fire hydrants throughout the city.
  • There are over 5,044 valves in the water system.
  • Employees working in the water system are required to be certified by the State of California to work in a water system.

 

New Seawater Intake Pumps-Carlsbad Desalination Plant-fish-friendly

New Fish-Friendly Seawater Intake Pumps at Carlsbad Desalination Plant

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New fish-friendly seawater intake pumps recently commissioned  at the Carlsbad Desalination Plant are among the most environmentally advanced intake pumps in the world.

The three intake pumps, manufactured by Indar, are part of a broader effort to ensure the long-term health of the marine environment near the Claude “Bud” Lewis Carlsbad Desalination Plant, which sits on the shores of Agua Hedionda Lagoon.

New intake pumps and state-of-the-art technology

Installation of the new intake pumps is part of a phased program to replace the existing seawater intake and discharge facilities with state-of-the-art technology to protect marine life that wasn’t available when the plant was operating with source water from the Encina Power Station. The closure of the power station in December 2018 led to temporary intake-discharge operations until the new intake pumps came online. The next steps include adding new intake screens, designed to prevent any sea-life larger than 1 millimeter (thicker than a credit card) from entering the plant.

Essential work during COVID-19 pandemic

The work to complete the construction and commissioning of the new fish-friendly seawater intake pumps was part of the essential work allowed under California guidelines during the COVID-19 pandemic. The contractor, Kiewit–Shea Joint Venture, worked in accordance with guidelines adopted by the State Building and Construction Trades Council and approved by Governor Gavin Newsom for essential construction. The contractor worked uninterrupted to complete the project per the June 30, 2020, deadline set by the Regional Water Quality Control Board without any health or safety violations.

The eventual transition of the desal plant to operate independent of the power plant was anticipated in the 2012 Water Purchase Agreement between Poseidon Water, which manages and operates the facility, and the San Diego County Water Authority, which purchases the water for use across the region. Currently, the plant provides about 10% of the region’s water supply.

New intakes part of advanced sea-life protection

New seawater intake pumps-Carlsbad Desalination Plant-Fish Friendly

The new intake screens are the final part of upgrades, which when complete in 2023, will make the Carlsbad Desalination Plant the first desalination facility in California to comply with the 2015 California Ocean Plan Amendment, which is among the most advanced sea-life protection measures in the world. Photo: San Diego County Water Authority

The new intake screens are the final part of upgrades, which when complete in 2023, will make the Carlsbad Desalination Plant the first desalination facility in California to comply with the 2015 California Ocean Plan Amendment, which is among the most advanced sea-life protection measures in the world. Poseidon Water also plans to implement the same state-of-the-art intake system at its proposed Huntington Beach Seawater Desalination Plant in Orange County.

“We are excited to reach this milestone at the Carlsbad Desalination Plant that highlights our commitment to environmental stewardship,” said Jim Madaffer, chair of the Water Authority’s Board of Directors. “This plant will continue to be a vital regional resource for decades to come, and it demonstrates that environmental enhancements can go hand-in-hand with water supply sustainability.”

Carlsbad Desalination Plant improves sustainability

The Water Authority can purchase up to 56,000 acre-feet of water from the Carlsbad plant per year – enough to serve approximately 400,000 people annually. The new pumps, combined with additional future investments, will continue to provide the San Diego region with a critically important drought-proof water supply from the Pacific Ocean.

The plant is a major component of the Water Authority’s multi-decade strategy to increase the county’s water supply reliability through supply diversification. San Diego County’s water portfolio approach has been successful in minimizing the region’s vulnerability to drought and other water supply emergencies.

“Using the most advanced technology for the seawater intake system builds on the Carlsbad Desalination Plant’s long history of protecting and preserving the coastal environment,” said Poseidon CEO Carlos Riva. “The new intake system will make this one of the most environmentally sensitive desalination plants in the world, and further enhance our region’s water reliability and climate resiliency.”

For more information, go to the plant website, carlsbaddesal.com, or to the Water Authority’s website, sdcwa.org.

Helix Water District’s Calavo storage tank was ideally positioned to play home to the new repeater. Photo: Helix WD emergency communication

New Helix Water District Connection Improves Emergency Communication

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East San Diego County firefighters and first responders will be better prepared to respond to emergencies due to improved communication capacity through a new partnership with the Helix Water District. The Heartland Communication Facility Authority recently installed a new radio repeater on Helix Water’s Calavo tank, located near Mt. Helix.

“When public agencies work together to improve the lives of our citizens, everyone benefits,” said Helix Board President Mark Gracyk. “We are delighted with the outcome and are very proud to participate in making East County a safer place to live.”

Heartland’s goal is to provide its customers with the highest quality of public safety communications services. Heartland provides public safety communication services to 13 fire agencies throughout East San Diego County. It uses a universal radio system – known as a VHF radio – to communicate with fire agencies and first responders.

New radio repeater improves public safety

Though reliable, the hilly terrain of East County can interfere with VHF radio communications. Diagram: Helix WD emergency communication

Though reliable, the hilly terrain of East County can interfere with VHF radio communications. Diagram: Helix Water District

Though reliable, the hilly terrain of East County can interfere with VHF radio communications. As part of its effort to improve communication in El Cajon and Spring Valley, it needed a suitable location to install a radio repeater between the two communities. The Calavo storage tank was ideally positioned to play home to the new repeater. Heartland approached Helix to work out an agreement.

“Heartland Communications Facility Authority knows the needs of our local emergency communication infrastructure,” said Dan McMillian, Helix Water District board member. “When Heartland approached Helix, our board saw this as an opportunity for our two agencies to work together for the benefit of the communities that we serve.”

“The addition of a radio repeater on the Calavo Drive water tank will allow firefighters from throughout the state who respond to the East County to communicate with each other and the dispatch center using this repeater,” said Carlos Castillo, Director of Heartland Communications. “Communications are an integral part of the firefighting effort in suppressing wildland fires, and firefighter safety relies on an effective communication infrastructure.”

Project completed prior to anticipated 2020 wildfire season

Improvements at the Calavo site included installing a new radio repeater and a four-foot antenna at the top of the tank. Photo: Helix WD

Improvements at the Calavo site included installing a new radio repeater and a four-foot antenna at the top of the tank. Photo: Helix Water District

Construction started in March 2020 and was completed in June 2020. Improvements at the Calavo site included installing a new radio repeater and a four-foot antenna at the top of the tank. As part of the project, San Diego Gas and Electric installed a new electric service and meter at the site so Heartland’s equipment can operate independently from Helix’s pumps and monitoring equipment.

“Heartland Communications would like to thank Helix Water District for allowing us to install our VHF repeater on their water tank,” said Castillo. “This collaboration between Helix and Heartland is a win-win for the fire service and the community. It will provide the critical communications infrastructure needed to enhance public safety.”

The Heartland Communication Facility Authority provides emergency communication services for its member agencies, which include Alpine Fire, Bonita Fire, San Miguel Fire, City of El Cajon, City of La Mesa, City of Lemon Grove, Lakeside Fire, City of Santee, Barona Fire and Viejas Fire.

The Helix Water District treats and delivers water to 277,000 people in La Mesa, El Cajon, Lemon Grove, and parts of Spring Valley, Lakeside, and unincorporated San Diego County.

Technology-Asset Management-Pipelines

Pipelines Assessed in Record Time with Latest Technology

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The San Diego County Water Authority’s asset management team recently celebrated the completion of a comprehensive condition assessment of more than 27 miles of the agency’s oldest pipelines. The assessment was performed in record time over just 16 months.

The work was part of a package of rehabilitative efforts on a portion of the First Aqueduct, which includes Pipelines 1 and 2 in North San Diego County. Built in 1947 and 1952, the two pipelines deliver treated water to the region and were constructed using various materials, including reinforced concrete and steel.

Proactive asset management team makes critical repairs

As the pipelines were inspected, areas that required immediate attention were identified and repaired, thereby minimizing future disruptions to water service and impacts to the surrounding environment. Sections of the pipelines requiring future repairs were added to a list of upcoming projects prioritized by the risks and associated costs.

“The asset management team took advantage of scheduled pipeline shutdowns, and with careful coordination, assessment work was performed concurrently with other major rehabilitation efforts in the region,” said Martin Coghill, operations and maintenance manager at the Water Authority. “This innovative approach saved time and avoided unnecessary disruptions in service to our member agencies.”

Throughout the condition assessment process, Water Authority staff worked closely with staff from member agencies to coordinate work being performed in their service areas and any potential impacts. Proactive repairs are crucial to ensuring the reliability of the regional water supply.

Collaboration with multiple contractors to perform complex work

In 2016, a search was conducted to find the best technologies to perform critical assessments to maintain the reliability of the pipelines. It resulted in a multi-technology, multi-contract approach.

The Water Authority partnered with multiple contractors to perform the complex work:

  • Diakont, based in Carlsbad, Calif., used its robotically-mounted technologies to inspect steel pipe sections. High-resolution LASER Profilometry and Electromagnetic Acoustic Transfer technology located internal and external corrosion defects that were then repaired by welding steel patches on the inside of the pipe. This method avoided costly excavations and environmental impacts.
  • Pipeline Inspection and Condition Analysis Corp., based in Edmonton, Alberta, brought its sophisticated Remote Field Technology to San Diego County to scan most of the reinforced concrete pipe using an innovative tool that moved through the pipe at a controlled speed. The technology had been previously used by the Water Authority and consistently demonstrated a high level of accuracy.
PICA, remote field technology, pipeline inspection

PICA uses cutting-edge Remote Field Technology to scan pipelines at a controlled speed with high accuracy. Photo: San Diego County Water Authority

  • Pure Technologies, a Xylem company with an office in San Diego, deployed its Near Field and Remote Field electromagnetic inspection tools to assess portions of the reinforced concrete pipe. With a focus on lightweight components, both tools were successfully conveyed through the pipelines using personnel with rope and pulley support.
technology, pipeline inspection, Pure Technologies

Pure Technologies’ innovative tool uses electromagnetic technology to assess reinforced concrete pipelines using personnel with rope and pulley support. Photo: San Diego County Water Authority

The focus on the Water Authority’s First Aqueduct is the latest chapter in the agency’s long-running strategy to assess critical pipelines and ensure the maximum lifespan is achieved with the most cost-effective methods. Proactive asset management efforts first began in the 1990s and were consolidated into the Asset Management Program in 2009. To date, more than 150 miles of the Water Authority’s total 310 miles of large-diameter pipelines have been assessed using cutting-edge technologies.

The asset management team collaborates with local, national and international organizations in the asset management and water infrastructure fields, focusing on knowledge sharing and asset life optimization.

Construction near San Marcos homes required creative thinking and community cooperation from the Vallecitos Water District to successfully complete the project. infrastructure

Community Outreach Makes Challenging Infrastructure Update a ‘Walk in the Park’

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In its efforts to maintain its critical infrastructure, the Vallecitos Water District undertook a challenging update to a wastewater system pipeline constrained by its precarious location.

The existing eight-inch gravity sewer pipeline conveys wastewater from the intersection of Rock Springs Road and Bennett Avenue west through a greenbelt area to an existing 12-inch pipeline in Rock Springs Road at Lancer Park Avenue. To expand capacity for current and future growth, it was replaced with a new 15-inch PVC pipe west of Matthew Lane and a 12-inch PVC pipe north and east of Matthew Lane.

See video following the progress of this vital infrastructure project

 

Complications due to environmental and neighborhood protection

The location of the affected manhole put equipment and crews close to a SDG&E gas line inside a greenbelt park area. Photo: Vallecitos WD infrastructure

The location of the affected manhole put equipment and crews close to a SDG&E gas line inside a greenbelt park area. Photo: Vallecitos Water District

The District always prefers to perform work in a street or public right-of-way. Neither were possible for this project due to its greenbelt and park location within feet of residential homes.

“We took every environmental precaution prior to construction,” said Lito Santos, Vallecitos Water District Project Engineer. “We performed a nesting survey, a raptor survey, and we also worked to tunnel under the bridge,” within the Environmental Protection Agency’s “Clear Water Rule.”

San Marcos Woods Homeowners Association board member Ross Fisher acted as a liaison between homeowners and the HOA with the District. Fisher expressed concern about access to the work area by the District’s large combination truck. The original proposal to create a concrete strip to drive over wasn’t feasible.

Due to its incredible strength, the grass-crete and existing lawns can handle the weight of a large service vehicle driving on it without significant damage. Photo: Vallecitos WD

Due to its incredible strength, the grass-crete and existing lawns can handle the weight of a large service vehicle driving on it without significant damage. Photo: Vallecitos Water District

Working together with Vallecitos Water District engineers, the group chose an alternative material called “grass-crete.” Grass-crete is a green porous paving solution that comes in easy-to-install rolls. It’s flexible, lightweight, durable and provides design versatility to the project. Due to its incredible strength, the grass-crete and existing lawns can handle the weight of a large service vehicle driving on it without significant damage.

Proximity to additional threats

Manholes were waterproofed, coated, and sealed as an additional precaution and to extend their longevity.

Manholes were waterproofed, coated, and sealed as an additional precaution and to extend their longevity. Photo: Vallecitos Water District

Vallecitos Water District engineers also worked with San Diego Gas & Electric to perform its work with enough safety clearance from a 16-inch transmission main artery gas line pressurized at 800 pounds per square inch. The District secured permission to dig within two to three feet from the line instead of the standard five feet.

The work area is also prone to flooding after large rain events, raising the water levels in the nearby creek high enough to infiltrate and inflow into the manholes. The District moved the manholes clear of the creek embankment, and lifted the manholes two feet above ground and clear of the flood plain to prevent runoff intrusion. Manholes were waterproofed, coated, and sealed as an additional precaution and to extend their longevity.

Homeowners praise Vallecitos cooperation with community

The District moved the manholes clear of the creek embankment, and lifted the manholes two feet above ground and clear of the flood plain to prevent runoff intrusion.

The District moved the manholes clear of the creek embankment, and lifted the manholes two feet above ground and clear of the flood plain to prevent runoff intrusion. Photo: Vallecitos Water District

“Overall Vallecitos left the greenbelt area as good or better when they started,” said Fisher of the HOA. “On a scale of one to ten, I have to give them a 9.5 or a ten. Working with the inspectors and Lito Santos the engineer, everything we asked for was done in a timely manner.”

“The project was a huge success,” said Santos. “Working with the Vallecitos Engineering Team, the Inspection Team and Mr. Fischer, it was not just a Vallecitos highlight but a career highlight.”

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