Facilities & Operations Archives

(L to R) SDG&E EV Customer Solutions Manager Lianna Lienau, Helix Division 2 Director Andrea Beth Damsky, Helix Board Vice President Joel A. Scalzitti, Helix Board President Dan McMillan, Helix Division 3 Director Mark Gracyk, Helix Division 4 Director Kathleen Coates Hedberg, and San Diego County Air Pollution Control District Chief of Emissions Reductions Kathleen Keehan at the groundbreaking for the Helix electrification project at its El Cajon operations center. Photo: Helix Water District

Helix Water District Working Toward Zero-Emission Future

April 4, 2025/in Facilities & Operations, News /by Gayle Falkenthal

As part of its initiative to transition to a zero-emission vehicle fleet, Helix Water District leaders broke ground in late March on a retrofitting project at the district’s operations center in El Cajon.

The $11 million project, which is almost entirely grant-funded, will increase electrical capacity and charging infrastructure needed for the transition at its operations center in El Cajon. The facility will also support other East County public agencies as they work towards electrifying their own vehicle fleets.

Helix Preparing to Meet New California Requirements

Helix Water District purchased its first EV truck in 2022. Photo: Helix Water District

While all new passenger cars, trucks, and SUVs sold in California will be zero-emission by 2035, the state wants government agencies with vehicle fleets to get to zero emissions more quickly. By 2027, all new medium and heavy-duty truck purchases must be zero-emission vehicles.

The district’s fleet of vehicles is used by employees responsible for maintaining 742 miles of pipeline, valves, hydrants, and meters. While the Helix Water District first began purchasing electric vehicles in 2022 as part of its overall sustainability efforts, its current infrastructure requires upgrades to support an electric-only vehicle fleet.

“The Helix board of directors voted 5-0 to approve this project because this is the next step on the path we’ve chosen for our agency,” said board member Mark Gracyk.

“We have already reduced our energy use by 15% and our carbon footprint by 40%. This project will be a model for other agencies working to electrify their fleets and help the cities we serve meet their climate action plan goals.”

In addition to the major change in operations, the Helix Water District must maintain 24/7 readiness for emergency responses, with a vehicle fleet that requires time to recharge.

Partner Collaboration Makes Helix Project Possible

Helix Water District will work with SDG&E and the San Diego Air Pollution Control District to complete its project. Photo: Helix Water District

Retrofitting the district’s operations center to increase electrical capacity and installing the new infrastructure presented challenges. The Helix project team moved quickly to secure outside expertise and funding to get ahead of other public agencies in California competing for resources.

Through funding and technical support from the San Diego County Air Pollution Control District and San Diego Gas & Electric, Helix is ready to begin construction. The organizations guided the district through idea gathering, planning, designing, and equipment selection. The collaboration will continue through construction.

“This charging infrastructure project is particularly impactful for air quality in the area because the communities serviced by the Helix Water District have some of the highest levels of air pollution in San Diego County. SDAPCD looks forward to the full implementation of this project,” said Paula Forbis, Air Pollution Control Officer, San Diego County Air Pollution Control District.

“Our collaboration with Helix Water District and the San Diego County Air Pollution Control District exemplifies the power of partnerships in driving our progress to meeting California’s climate goals,” added Miguel Romero, Senior Vice President and Chief Commercial Officer, SDG&E.

Helix Effort Meets Climate Action Plan Goals

The district’s fleet of vehicles is used by employees responsible for maintaining 742 miles of pipeline, valves, hydrants, and meters. Photo: Helix Water District

Vehicle emissions are one of the highest sources of pollution in San Diego County. For this reason, SDAPCD considers the shift from diesel to electric vehicles one of the most impactful ways to improve air quality.

According to SDG&E, Helix Water District’s plan to transition 86 medium- and heavy-duty vehicles and install nearly six megawatts of charging infrastructure aligns with SDG&E’s mission to support public agencies and fleet operators in meeting California’s Advanced Clean Fleets (ACF) regulation and local climate action plan goals.

Helix received a $5.2 million grant from the San Diego County Air Pollution Control District, a $2.2 million grant from San Diego Gas & Electric’s Power Your Drive for Fleets Program and an additional $1.5 million through the Disadvantaged Community Electric Vehicle Charger Rebate Program. The district will fund the remaining $2 million.

“We understood early on the impact that the state’s advanced clean fleet regulation would have on the district. The cost associated with projects of this size are significant and we did not want this to impact the communities we serve, many of which are low-income communities,” said Dan McMillan, board president of the Helix Water District.

“I want to thank, on behalf of the district, San Diego Gas & Electric and the San Diego County Air Pollution Control District for their financial support. Collaboration is the only way we can move projects like this forward.”

The electrification project will take approximately one year to complete.

City of San Diego Water Utilities personnel make repairs on a fire hydrant. Photo: City of San Diego

City of San Diego Working to Ensure Water System Readiness For Fire Emergencies

March 10, 2025/in Facilities & Operations, News /by Gayle Falkenthal

With the threat of heightened wildfire risk ever present in the San Diego region, the City of San Diego’s Public Utilities staff employs multiple strategies, including preventative maintenance and rapid response efforts, to ensure the continued reliability of the City’s water system in an emergency.

In the event of public safety power shutoffs impacting water infrastructure, Public Utilities staff execute the City’s emergency response plan, ensuring backup generators are available and fully operational. Crews remain on duty to refuel generators as needed and monitor operations to keep the system running smoothly.

City of San Diego Public Utilities crews inspect and maintain the city’s water infrastructure so it will function properly even in an emergency. Photo: City of San Diego

Thanks to proactive planning, hard work, and expertise, customers experience the minimum possible impact on their water delivery during any wildfire watches or responses.

“Repairing and maintaining the City of San Diego’s water infrastructure is a top priority,” said Juan Guerreiro, Director of the City’s Public Utilities Department.

“With wildfires being a potential danger in our region, it is imperative that we have a reliable water system to help protect us. I’m very proud of the hard work of our Public Utilities staff, who are essential to keep the water flowing.”

Preparing Water Infrastructure For Wildfire Emergencies

Preventative maintenance on key water system infrastructure is part of the City of San Diego’s wildfire preparedness. Photo: City of San Diego

Public Utilities staff prioritize safeguarding vital water infrastructure during power shutoffs and wildfires while also maintaining firefighting resources citywide. One key priority is ensuring the city’s 26,000 fire hydrants are in proper working order.

Public Utilities’ teams respond to an average of 100 knocked-over hydrants each year. Repair work is typically completed within 24 hours.

In addition, crews perform preventative maintenance on approximately 7,000 fire hydrants annually. In 2024, crews replaced 71 hydrants and repaired an additional 357 hydrants that were identified as leaking.

These collective efforts are essential to ensuring a reliable potable water system for local firefighters to perform their challenging tasks and to help keep our City safe at all times.

Border 2 Wildfire Tests City of San Diego Response

City water pump station crews overhauled two critical valves that support water supply storage in the South Bay. Photo: City of San Diego

During the recent Border 2 wildfire in late January 2025, City of San Diego Public Utilities crews prepared infrastructure in the South Bay to prepare for any potential impacts.

City water pump station crews overhauled two critical valves that support water supply storage in the South Bay. The valves allowed for an alternate connection to distribute water to customers as the Border 2 fire approached the Otay Water Treatment Plant and the Lower Otay Reservoir.

Otay Water Treatment Plant operations were able to continue through the duration of the fire, thanks to the experienced staff and the robust firefighting efforts by the California Department of Forestry and Fire Prevention (CalFIRE). Crews ensured a secondary water supply was ready if needed to maintain uninterrupted water service to customers.

Russell Kubota has dedicated 23 years to his work as a Landscape Maintenance Worker with the Vallecitos Water District. Photo: Vallecitos Water District

Water Industry Landscape Maintenance Pros Ensure Safety and Preserve Habitats

December 26, 2024/in Facilities & Operations, News, Science/Environment /by Gayle Falkenthal

The San Diego region’s future depends on water. The San Diego County Water Authority and its 22 member agencies depend on the skill and dedication of all their professionals to provide a safe, reliable water supply to support the region’s economy and the quality of life of its residents.

Professional landscape maintenance personnel play a vital role in the water industry in San Diego County, overseeing environmental stewardship, water conservation, and the preservation of habitats and ecosystems.

Russ Kubota helps maintain the vegetation and habitat throughout the Vallecitos Water District, including easements, and ensures accessibility to key facilities, including pipelines, tanks, and reservoirs. Photo: Vallecitos Water District

Russell Kubota has dedicated 23 years to his work as a Landscape Maintenance Worker II with the Vallecitos Water District. Kubota helps maintain the vegetation and habitat throughout the district, including easements and ensures accessibility to key facilities, including pipelines, tanks, and reservoirs.

Kubota has a degree in ornamental horticulture and two licenses from the California Department of Pesticide Regulation, allowing him to use herbicides when required to help manage the district’s environment. He has worked in the Conservation Department, performing irrigation audits, and represented the district performing outreach at events such as the San Marcos Street Fair, educating the public on water conservation.

See Kubota at work in this video.

District Safety Comes First

Currently, Kubota focuses on maintaining a fire-safe, ecologically healthy ecosystem throughout the Vallecitos Water District, covering approximately 1,989 acres in north inland San Diego County.

Safety is a key responsibility. “In the event of an emergency or even for routine maintenance, one of the biggest reasons I have to maintain the vegetation around our facilities is for safety,” said Kubota. “Being able to easily access and work around our equipment without being exposed to any hazards like rattlesnakes or bees.”

Russ Kubota and his team at the Vallecitos Water District work with California Department of Forestry (CalFIRE), which helps provide personnel for vegetation management through its inmate firefighter program. Photo: Vallecitos Water DIstrict

Russ Kubota and his team at the Vallecitos Water District work with the California Department of Forestry (CalFIRE), which helps provide personnel for vegetation management through its inmate firefighter program. Photo: Vallecitos Water District

Kubota coordinates this effort with the California Department of Forestry (CalFIRE). CalFIRE helps provide personnel for vegetation management through its inmate firefighter program, officially called the “Conservation (Fire) Camp Program.” It is run by the California Department of Corrections and Rehabilitation (CDCR).

Kubota says he’s grateful for the opportunity to work with the program participants. “Because all these areas are part of public infrastructure, the inmates receive time off from their sentences for community service.”

Landscape Maintenance Preserves Ecosystem

Monitoring and removing invasive plant species is a key responsibility for Russ Kubota. Photo: Vallecitos Water District

Kubota oversees the removal of non-native plants that are flammable and invasive, such as eucalyptus, castor bean, pampas grass, and salt cedar.

“Many areas of our district are near environmentally sensitive habitat. I always try to be aware of all the different types of plants and animals that are in our easements and right of ways,” said Kubota.

Kubota says he enjoys being outdoors, working in the many beautiful areas of the district. “I’m outside all the time, out in the fresh air, and we have lots of wildlife out here and a lot of natural vegetation like our oak trees. It’s just a beautiful place to work.”

Kubota says he hasn’t considered retiring because he gets to work outdoors and with people who are equally dedicated to their jobs at the Vallecitos Water District. It also doesn’t hurt that his job gives him time to surf in the morning before work.

“I really do enjoy the people I work with. I love the job sites that I go to. I love the entire work environment here at Vallecitos,” said Kubota.

Progress is on schedule for completion of the East County Advanced Water Purification Program in 2025. Photo: East County Advanced Water Purification Program

East County Advanced Water Project Fall Progress Report

November 12, 2024/in Facilities & Operations, News /by Gayle Falkenthal

Progress on the East County Advanced Water Purification Program (East County AWP) continues on schedule at multiple East County locations with significant milestones in recent months. Project construction is scheduled through 2025.

The main project site at the purification treatment facility is busy, with roughly 280 workers working on completion. Nearly 90% of the concrete is poured, and facility components are arriving from as far away as Japan and Canada.

The East County Advanced Water Purification Program is an important water project for East San Diego County. When complete, the Program will deliver a clean, reliable, and local water source.

See a video update on the progress of the East County Advanced Water Project here.

Roof Rising on the East County AWP Purification Treatment Facility

The building housing the advanced water purification treatment facility is taking shape as the roof is being added.

Raising the roof at the main treatment facility. Photo: East County Advanced Water Purification Program

Construction on the 23,000-square-foot Visitor’s Center will be complete at the end of 2025. It will house administrative offices, the operation control center, a testing laboratory, and a community room. Steel beam installation, including 66 columns and 100 beams, will use 350,000 pounds of U.S. steel. The roof has also been installed.

There are four water purification steps, including membrane filtration, reverse osmosis, advanced oxidation using ultraviolet light, and free chlorine disinfection. The advanced water purification facility will treat up to 11.5 million gallons daily for 50,000 households.

Water from this project will be provided 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.

Overnight Construction Underway Into November

Work underway on Fanita Drive in Santee. Photo: East County Advanced Water Purification Program

Work is underway on Fanita Drive in Santee. Photo: East County Advanced Water Purification Program

More than 70% of the purified water and wastewater pipelines are installed throughout Santee and Lakeside. In addition, an 18-inch diameter wastewater pipeline was pulled under the San Diego River and a nearby golf course. At 3,500 feet long, it is one of the longest horizontal directional drill operations ever in San Diego County.

Overnight work began in late October near and at the intersection of Mast Boulevard and Cuyamaca Street in Santee. Work hours are from 9 p.m. to 6 a.m. Monday through Friday. This night work will allow crews to install a purified water pipeline when the roads are less busy, minimizing impacts to the public.

For residents who live in the immediate area, information was mailed to affected households describing the work and providing contact information. Construction in this area is expected to last through the second week of November.

Interactive Map Helps Residents Stay Updated On Progress

With construction in multiple locations throughout East County, the Program’s interactive map continues to be a valuable 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 on Instagram and Facebook.

Hungry goats are used to help clear brush and maintain wildfire safety at the Miramar Reservoir. Photo: City of San Diego

Goats Help Maintain Miramar Reservoir, Reduce Fire Risk

October 31, 2024/in Facilities & Operations, News, Science/Environment /by Gayle Falkenthal

Visitors enjoy seeing the variety of wildlife when visiting the City of San Diego’s Miramar Reservoir in the Scripps Ranch community.

Recent visitors might have been surprised by an unusual group of animals:  hundreds of goats grazing near the dam.

The City’s Public Utilities Department contracted with a local company to have more than 250 goats clear dry brush to allow for inspection of the dam and help reduce fire risk.

Under human supervision, several dozen goats can efficiently and safely clear an acre of brush per day. Photo: City of San Diego

Goat Herds Provide Energy-Efficient Reservoir Maintenance

Public Utilities operates and maintains dams for nine reservoirs that support the water supply for the City of San Diego. Routine maintenance and daily inspections help ensure the safety of this vital infrastructure.

Goats can play a vital role in this maintenance because they provide an energy-efficient and low-carbon alternative to mechanized equipment to remove dry brush and ensure proper visibility of the face of the dam.

Since 2005, the City of San Diego has allowed the use of goats to remove brush, which helps reduce the risk of wildfires. Goats are voracious eaters and are not picky about what they consume.

Twenty to thirty goats can clear an acre of brush in a few days. The goats eat plants down to the soil’s surface but leave root systems that help keep soil from washing away and causing hillside erosion.

Goats May Become A Regular Sight

Goats may be used at additional locations among the City of San Diego’s nine reservoirs. Photo: City of San Diego

After evaluating the goats’ work at Miramar Reservoir, the City will assess the feasibility of using their services in other locations.

Private property owners with large amounts of land needing brush clearance within the City of San Diego can also use goats to remove brush on their property. They must first receive a permit from the Fire-Rescue Department. There is no charge for the permit application.

Combustible vegetation, especially dry brush, should be cleared to reduce fire risk. Any material left in its natural state will readily ignite, burn, and cause fire to move to any structure or other vegetation. This includes dry grass, brush, weeds, litter, and waste.

For more information about brush management and guidelines, visit sandiego.gov/fire/services/brush.

Wastewater Collection Systems Workers (left to right) Raul Rodarte, Dennis Richardson, and Jesse Halbig demonstrate how they keep sewer pipes clean with a combination truck on the facilities tour. Photo: Vallecitos Water District

Rave Reviews for Vallecitos Water Academy Facilities Tour

October 28, 2024/in Facilities & Operations /by Gayle Falkenthal

The reviews are in for the 2024 Vallecitos Water District’s annual Water Academy, featuring a tour of the District’s facilities.

Participants raved about their opportunity to learn firsthand about the District’s operations from its professional staff in multiple disciplines, including James H. Gumpel, P.E., Vallecitos Water District General Manager.

Raul Rodarte, Wastewater Collections Worker II, offers a demonstration during the facilities tour. Photo: Vallecitos Water District

Among the stops along the tour:

Water Operations Control Room
Wastewater Collections
Warehouse, Construction, and Training Facilities
Maintenance and Repair Shops and Mechanics Bay
Sustainable Demonstration Garden and Meters

See a video of the facilities tour events.

Water Academy Tour Highlights

The District’s Wastewater Collections Department demonstrated how it keeps sewer pipes clean with a combination truck. The CCTV camera van was also on display. A recorded video showed how the camera system inspects the District’s sewer pipes.

Wastewater Collections staff are also trained as the District’s Confined Space Rescue Team. They discussed how the team’s preparedness and training to address emergencies immediately, instead of waiting for first responders, can save lives.

At the District’s welding shop and mechanics bay, mechanics explained how performing repairs in-house saves District customers money.

The Maintenance Services Department discussed the essential emergency repair parts maintained in the warehouse which allows construction crews to expedite water main repairs and return service to the customers as soon as possible.

Close Up Look At Equipment

Water Academy participants also got a presentation by the Construction Department with a closeup look at heavy equipment in operation, including a Mini-Excavator, Backhoe, Skid Steer, Hydro Excavator and Service Truck, and a 10-wheeler Dump Truck. All the equipment enables Vallecitos Water District personnel to repair water mains as quickly as possible to return customers to service.

Water Operations personnel demonstrated the Neutral Output – Discharge Elimination System (NO-DES) trailer, which functions as a portable water filtration unit. It removes minerals that can settle in water mains over many years. This helps to maintain high water quality for the District’s customers.

Vallecitos Water District is among the first agencies in San Diego County to purchase one of these units. It also helps the District comply with regulations that require urban retail water suppliers to submit water loss audits to the State of California annually. Water agencies are required to account for every drop of water and reduce water waste wherever possible.

Staff Demonstrate Specialized Skills

At the District’s Spill Emergency Response Plan Training Center, participants learned how Vallecitos employees practice responding to sewer spills and watched a demonstration. All water used for training and the demonstration is potable water rather than actual wastewater. A combination truck was set up downstream to demonstrate how a sewer spill would be mitigated and collected.

Water Operations field and lab testing equipment were on display. Several tests were run to show how lab testing in-house delivers faster, more cost-efficient results. Additionally, staff showed customers how, by adding CO₂to a water sample, the pH (measure of acidity or basicity) is changed.

Vallecitos Water District customers learn how to check their meters at home. Photo: Vallecitos Water District

Employees in the Meter Department showed customers how to read their own meters and how to check for leaks.

No Vallecitos Water District tour is complete without a stroll through its Sustainable Demonstration Garden, including its new seed library and garden features.

Positive Participant Feedback For Facilities Tour

Participants in the Vallecitos Water District facilities tour offered positive feedback from their experience. Photo: Vallecitos Water District

Participants received samples of PureGreen fertilizer from Encina and water bottles and had fun with trivia questions to conclude the tour.

Participant reviews highlighted the complexity of the operation, the friendly staff, and how much they learned.

“(The) complexity of providing water to a high population density coastal area. Good people with good management” wrote Frank Yakos.

“Previous to today I already had a very positive impression of VWD. Today’s information increased my positive impression immensely,” wrote Diane Veach.

“Learned something interesting from each presenter, learned a lot! Loved how friendly everyone is,” wrote Ann Kreile.

“I’m impressed with everything! Clean facility! Great staff! Great presentation!” raved Nancy Sims.

“Thanks! Keep up the good work!” said it all for Michael Wilkinson.

Olivenhain Municipal Water District is beginning construction on new recycled water pipelines in Encinitas. The expansion of OMWD’s recycled water distribution system will result in the savings of more than 12.5 million gallons of imported drinking water each year. Photo: Olivenhain Municipal Water District

Recycled Water Pipeline Projects Ensure Reliable Water Supplies for Olivenhain Municipal Water District

September 24, 2024/in Facilities & Operations, News /by Gayle Falkenthal

Olivenhain Municipal Water District is beginning construction on new recycled water pipelines in Encinitas. The pipelines are part of a larger expansion of OMWD’s recycled water distribution system that will result in the savings of more than 12.5 million gallons of imported drinking water each year.

This phase of the project involves installing pipelines on Summerhill Drive and Village Center Drive in Encinitas. Work is scheduled to take place Monday through Friday, 8:30 a.m. to 3:30 p.m. Additionally, restricted work hours of 9 a.m. to 2 p.m., Monday through Thursday, and 9 a.m. to noon on Friday, will be in effect for any work directly impacting Diegueño Middle School.

Other project phases involved the construction of recycled water pipelines around Park Dale Lane and Gatepost Road in Encinitas, which are now complete, and along Calle Barcelona in Carlsbad, on which work continues. This project is anticipated to be completed in spring 2025. No impacts to customers’ drinking water supplies are anticipated.

Minimizing Traffic Disruptions for Customers

OMWD is coordinating with the cities of Carlsbad and Encinitas on a traffic management plan to minimize traffic disruptions for residents and businesses during construction. Learn more in the video presentation below.

OMWD successfully secured approximately $900,000 in grant funding to make this project cost-effective for ratepayers. Specifically, both the US Bureau of Reclamation and the California Department of Water Resources are contributing grant funds to offset project costs.

Ensuring Safe, Reliable Water Supplies

By expanding the recycled water distribution system, OMWD will cut costs by replacing important drinking water with recycled water. Photo: Olivenhain Municipal Water District

OMWD receives 100 percent of its drinking water supply from the Sacramento-San Joaquin Delta and the Colorado River. These sources have become unreliable due to droughts and overuse.

Recycled water is locally produced, disinfected wastewater used for irrigation. It is a drought-resilient supply and costs less than potable water. In addition, using recycled water reduces the amount of treated wastewater discharged to the ocean and reduces our dependence on imported water from faraway sources.

OMWD has identified opportunities in Encinitas and Carlsbad to connect more customers to its recycled water distribution system. The completion of the pipeline extensions will result in the conversion of 28 water meters from potable to recycled water, saving more than 12.5 million gallons of imported drinking water every year.

OMWD serves up to 15% of its overall demand from recycled water treated through its award-winning 4S Ranch facility. Photo: Olivenhain Municipal Water District

OMWD produces up to two million gallons of recycled water daily at its 4S Ranch Water Reclamation Facility. Additionally, OMWD is the lead agency of the North San Diego Water Reuse Coalition, a group of nine North County agencies that coordinate across jurisdictional boundaries to expand the reach of the recycled water.

As a result, OMWD now serves up to 15 percent of its overall demand from recycled water and continues to identify additional ways to make recycled water available to eligible customers.

Get the latest updates on OMWD’s dedicated projects page on its website: www.olivenhain.com/projects

San Diego Region ‘Not Immune’ to Calgary Pipeline Failure

June 25, 2024/in Facilities & Operations, News /by Gayle Falkenthal

As soon as the Water Authority’s Martin Coghill heard about a catastrophic pipeline failure in Calgary two weeks ago, he knew how distressing it could be.

“When they’re in a situation where they call us for help from over 1,600 miles away, that’s a bad, bad day,” Coghill said.

The Water Authority was quickly able to send the final pieces of the infrastructure puzzle to Calgary to speed the city’s repairs. But Coghill, the Water Authority’s asset management manager, knows that similar problems could quickly impact San Diego County.

“In our aqueduct system, there are 80 miles of pre-stressed concrete cylinder pipe,” Coghill said. “That’s the same type of pipe that suffered catastrophic failure in Calgary.”

See how the Water Authority helped keep the water flowing in Calgary.

Pipeline failure potential in San Diego

The Water Authority experienced the same kind of problem in 1979, when pre-stressed pipes failed in the region for the first time, impacting the county’s water supply.

In response to that failure, the Water Authority spent the past 42 years relining 48 miles of pre-stressed pipe – or 60% of that type of pipe in the system – through a process called steel relining. That ongoing investment has significantly decreased the risk to the region’s water supply.

The catastrophic break in Canada led many across North America to recognize the unique space that water infrastructure plays in their daily life. As Kerry Black, a civil engineering professor at the University of Calgary said in a CBC interview, “when it breaks, it’s the first thing you’ll complain about but it’s the last thing you want to pay for.”

Across the United States, the potential for pipeline failure is an ongoing weakness, according to the American Society of Civil Engineers. It gave the nation’s water utilities a C- grade in its most recent national infrastructure report card in 2021. “Unfortunately, the system is aging and underfunded. There is a water main break every two minutes and an estimated six billion gallons of treated water lost each day in the U.S., enough to fill over 9,000 swimming pools,” said ASCE.

Investing in critical infrastructure upgrades in San Diego County

The Calgary pipeline failure provided a reminder about the unique space water infrastructure plays in daily life. Photo: San Diego County Water Authority

Coghill knows that even with all the advancements and investments in inspection and monitoring technologies, there are still gaps in the Water Authority’s ability to see problems coming. “Despite these technologies, we only have tools to actively monitor about two-thirds of the things that can go wrong with pre-stressed pipe,” Coghill said. “We’re not immune from a failure.”

For the Water Authority, protecting against a break in San Diego County happens on two parallel tracks and involves investing in critical infrastructure upgrades and testing.

“There are two roads we go down,” Coghill said. “One is a proactive approach in which every two years we re-evaluate what sections of the pre-stressed pipe are the next priorities based on risk and consequence of failure. That is put into the recommendation for the upcoming budget cycle for rehabilitation using steel liners. The other one is a more reactive approach, which I call the ‘imminent failure watch.’”

Modern tools track down early warning signs

That’s where the Water Authority’s installation of acoustic fiber optic cable allows engineers to hear a localized problem starting in real time, allowing the Water Authority to shut things down to fix the problem, and ideally with enough time to prevent a break.

This parallel track methodology has served the organization well since 2006—the last time a major failure of a prestressed pipe occurred—and in 2022, in response to data recorded by the acoustic monitoring system, identified the need for an urgent repair in the Bonsall area.

Coghill summarized the risks for our region. “Provided that we maintain a commitment to steel relining our prestressed pipe, and we maximize the use of available technologies, we are doing everything we possibly can to manage this type of pipe.”

Meet the “Robots” Protecting San Diego’s Water Pipelines

May 31, 2024/in Facilities & Operations, News /by Kristiene Gong

Much like your body, public infrastructure needs constant care and attention. Check-ups, tests, and consistent monitoring help you stay on top of your health. It’s similar with the regional water infrastructure, with 1,400 structures, 308 miles of large pipelines, a dam, a water treatment plant, as well as pump stations and hydroelectric facilities. All pieces working together as one integrated system, much like your body, yet all of it aging, day by day.

Monitoring and assessing the condition of the regional water infrastructure is the responsibility of the “doctor” of asset management, Martin Coghill, Operations and Maintenance Manager at the Water Authority, and his staff.

During the last week of May, members of the Water Authority’s Board of Directors were treated to a showcase of technologies, as well as incredible stories from Coghill and his staff about their use – and how they help the organization save time and money.

A history of innovation

The Water Authority has long been on the cutting edge of testing and utilizing the latest technology to help assess the condition of its system. This is important because Water Authority pipelines no longer traverse formerly agricultural and rural settings. San Diego County has urbanized quite a bit over the last half-century, and a ruptured pipeline in a now urban setting is likely to threaten property and the livelihoods of those living nearby.

In 2006, a large-diameter pipeline ruptured in the western portion of Mission Trails Regional Park. Thankfully, damage wasn’t worse, not only because of the remote location, but also thanks to the rapid response of Water Authority staff that closed valves to stop the flow of water.

Though the break was unfortunate, it provided critical data to the Water Authority, who had recently installed a new technology inside the pipe – an acoustic fiber optic cable. That AFO cable heard pings as the pipeline started to fail and recorded that data. As a result, that type of cable has been installed in other pipelines throughout San Diego County to help monitor their health.

Now, Coghill and his team know what it sounds like when a section of pipe is in distress. That technology works alongside other technologies to provide critical data about the condition of the pipe, which then helps Coghill and his staff develop a recommendation for repair before the pipe fails.

In the 1980’s, Water Authority staff thought up an ingenious solution to reline a certain kind of pipe called Prestressed Concrete Cylinder Pipe with new steel liners. That repair solution continues to be the preferred solution by the Water Authority and other water agencies around the world to repair those sorts of pipes. The bonus is that this method of repair saves the agency millions of dollars each year and is less intrusive than digging up and replacing those sections of pipelines.

An eye to the future

This innovative culture continues to breed new, cost-effective solutions.

One historical challenge has been assessing the condition of the pipe while it’s in service. In the past, pipelines had to be dewatered before crews could enter them to deploy tools and assess their condition. One fairly new technology that allows the pipelines to stay in service – saving water and money – are acoustic leak detection devices. These tools are inserted into a live pipe and travel with the flow of water. They can detect sounds of active leaks.

Another challenge has been “getting eyes” on the inside of the approximately 1,400 structures along the pipelines. In order to inspect them on a routine basis, staff have had to climb down into the structures and take photos. The confined space makes this task hazardous and difficult. Recently, one of Coghill’s staff developed a tool using a 360-degree action camera mounted on a telescopic pole. Staff was able to save the organization money by purchasing the components separately and assembling them. This innovative solution saved the Water Authority nearly $9,000, which does not include the staff time saved from having to climb in and out of each structure to take the same photos.

These new technologies and tools produce large amounts of very important data. It takes Coghill and his team many hours to comb through it, crunch the numbers, and analyze it to develop recommendations for repairs or replacement. His team is considering other data storage and reporting options, including use of artificial intelligence and/or other software that could streamline efforts to analyze the data.

While the technology showcase was just a one-day event, the use of the featured technologies, along with monitoring and condition assessment efforts, continue, 24 hours a day, 7 days a week. At the heart of it all lies a team and their tools embedded in a culture of innovation – an investment for the future that helps safeguard our region’s long-term sustainability.

Previous tech showcase story: Agency Embraces Innovation at Technology Showcase – Sept. 18, 2018
Patent: https://www.waternewsnetwork.com/water-authority-awarded-patent-for-pipeline-inspection-tool/ (May 3, 2022)
KPBS article: https://www.kpbs.org/news/science-technology/2024/03/19/high-tech-ways-san-diegos-water-transmission-pipelines-maintained (Mar. 19, 2024)

Helix Water District crews lower the five-ton replacement valve into place for installation. Photo: Helix Water District

Helix Water District Replaces Aging Key Water Valve

April 8, 2024/in Facilities & Operations /by Gayle Falkenthal

One of the largest water valves key to Helix Water District operations was recently replaced. The massive five-ton, five-foot diameter valve is one of the largest in the district’s operation.

This valve isolates a section of pipe allowing water from Lake Jennings to flow into the R.M. Levy Water Treatment Plant. This replacement addresses two needs: First, it replaces an aging valve, and second, it allows Helix Water District to make cost-effective improvements on a 62-year-old supply line feeding the water treatment plant.

Helix Water District crews prepare the five-ton replacement valve for installation. Photo: Helix Water District

Infrastructure Updates Preparing for East County Advanced Water Purification Program

The valve replacement is among the major improvements underway that will help move, treat, and deliver new water from the East County Advanced Water Purification Program. The program will come online for East County in 2026.

The East County AWP program creates a new, local, and drought-proof water supply using state-of-the-art technology. It will purify recycled water, producing up to 30% of East County’s drinking water.

All work on installing the replacement valve in its new location took place in one day. Photo: Helix Water District

The large valve isolates a section of the Lake Jennings pipeline, which moves water out of Lake Jennings and to the inlet of the Levy treatment plant. Since the new East County AWP water will flow through this pipeline 24 hours a day every day for the next 30 years, it is vital for the Helix Water District to inspect and make any necessary repairs to ensure the pipeline is in excellent condition before the new water source comes online. The old valve had exceeded its useful life.

Replacing the large valve also allowed the Helix WD to relocate the new valve, improving access for inspections and maintenance. The previous valve was located over 400 feet from where the water enters our treatment plant and upstream of our other supply pipeline, leaving this section of the pipeline filled with water.

The new water valve has an expected operation life of 50 years. Photo: Helix Water District

Before relocating the new valve, Helix maintenance teams could only access this section of pipe during a treatment plant shutdown. While working on the old valve, the district needed to purchase more expensive imported water to serve its customers while the plant was shut down and unable to produce its regular supply.

With the new valve in place, fewer shutdowns will occur and prevent the need for purchasing supplemental imported water while performing maintenance and repairs. Relocating this valve and keeping the plant running was the best option for long-term operations and cost savings.

Water Valve Installation Complete In One Day

Maintenance professionals secure the new valve into place. Photo: Helix Water District

Construction started early in the morning by cutting out an existing pipe section near the treatment plant’s headworks. The new valve was lowered into position, aligned, welded together, and up and running within 14 hours. The valve is so large it takes more than 400 rotations to close it. The new value is expected to have a useful life of 50 years.

Current work to accommodate the East County AWP project is still in progress. It involves creating new access ways, removing the old valve, constructing a new vault, and preparing the Lake Jennings pipeline for inspection.

Proactive projects like the valve replacement reduce risk, give staff flexibility and redundancy, and prepare the Helix Water District for more efficient operations. Photo: Helix Water District

Once completed, the district will have longer-lasting infrastructure that can meet the demands of our region and future water supplies. Proactive projects like the valve replacement reduce risk, give staff flexibility and redundancy, and prepare the Helix Water District for more efficient operations.

To learn more about East County AWP, please visit https://eastcountyawp.com/

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