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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

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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

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

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

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

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

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/

 

The Helix Water District's Tunnel Hill storage tank rehabilitation project took approximately two years to complete. Photo: Helix Water District

Tunnel Hill Water Tanks Rehabbed and Upgraded by Helix Water District

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The Helix Water District recently completed an extensive rehabilitation of its Tunnel Hill water storage tanks. The two tanks are above Interstate 8 near the Los Coches freeway exit. The tanks play an important role in the water infrastructure system by storing and providing water to thousands of Helix Water District customers in Lakeside and El Cajon.

The project took two years to complete in several phases. The first phase of the project involved stripping the exterior of the smaller and newer, reinforced concrete tank. The new, natural concrete finish does not require paint and will reduce long-term maintenance costs.

The larger steel Tunnel Hill water tank received a corrosion-resistant aluminum dome roof. Photo: Helix Water District

The larger steel Tunnel Hill water tank received a corrosion-resistant aluminum dome roof. Photo: Helix Water District

Next, the larger steel tank received new paint and a corrosion-resistant aluminum dome roof. The height of the tank was extended by five feet to improve the tank’s performance and safety in an earthquake, especially to protect nearby neighborhoods. The exterior of the steel tank was recoated.

Both tanks received new interior coatings to prevent corrosion and were replumbed with flexible fittings to prevent breaks and keep the tanks connected during an earthquake.

Asset Management

Both tanks received new interior coatings to prevent corrosion and were replumbed with flexible fittings to prevent breaks and keep the tanks connected during an earthquake. Photo: Helix Water District

Both tanks received new interior coatings to prevent corrosion and were replumbed with flexible fittings to prevent breaks and keep the tanks connected during an earthquake. Photo: Helix Water District

“The Tunnel Hill Tank improvements are a great example of successful asset management,” said Helix Water District Board President Kathleen Coates Hedberg. “It would have cost over $10 million dollars if we had to replace the tanks. However, rehabilitating cost $3.5 million dollars. Our District is over 100 years old, and it is important to stay on top of our aging water system. We continuously monitor and manage our infrastructure because it’s the best long-term solution for our customers.”

The completed improvements will extend the life of the Tunnel Hill tanks for another 50 to 75 years.

Watch video of the Tunnel Hill Tank rehabilitation project in progress

Vital Roles In Water Infrastructure

Tanks are the most visible parts of water infrastructure and play a vital role in supplying water for the daily needs of residents and businesses, as well as for emergencies. The Helix Water District operates and maintains 25 tanks across its 50-square-mile service area. Proactive rehabilitations are less expensive than the construction of a new tank.

The height of the larger tank was extended by five feet to improve the tank’s performance and safety in an earthquake, especially to protect nearby neighborhoods. Photo: Helix Water District

The height of the larger tank was extended by five feet to improve the tank’s performance and safety in an earthquake, especially to protect nearby neighborhoods. Photo: Helix Water District

Eight additional water storage tanks were inspected and repaired in 2022. In addition, as part of its proactive maintenance, crews replaced 11,560 feet of cast-iron pipeline and surveyed 14,728 feet of pipeline route for design.

The district pulled electromagnetic detectors through 12,000 feet of the 36-inch diameter pipeline that delivers water from the Colorado River and Northern California to the R.M. Levy Water Treatment Plant in Lakeside. The detectors measure the pipe wall and identify weak points, facilitating faster, more precise and less expensive repairs. Based on the data, the Helix Water District replaced 805 feet of pipe and installed 34 steel plates and 10 new access manways.

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

If a leak is confirmed, then a repair is scheduled and completed within days of discovery and during normal working hours. Photo: Otay Water District Leak prevention

Annual Leak Detection Program Gets Underway in Otay Water District

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As part of its annual preventative maintenance program to safeguard its water supply and reduce water loss, the Otay Water District will conduct leak inspections of its pipeline system beginning January 30. Inspections are expected to continue until April 28.  The District’s contractor, Utility Services Associates, will inspect approximately 171 miles of potable water mains in Spring Valley and Jamul, along with potable and recycled water mains in areas of Chula Vista.

Minor water leaks account for more than a trillion gallons of water wasted each year in homes across the United States. According to the EPA Fix-A-Week-Leak website, each average household with unaddressed leaks can account for 10,000 gallons of water loss every year, enough to wash 300 loads of laundry.

Since 2013, the proactive Leak Detection Program has identified 292 leaks that have been repaired by the District, resulting in an average annual savings of $54,000 per year from reduced water losses. Graphic: Otay Water District leak prevention

Since 2013, the proactive Leak Detection Program has identified 292 leaks that have been repaired by the District, resulting in an average annual savings of $54,000 per year from reduced water losses. Graphic: Otay Water District

For example, the EPA reports a leak just one-32nd of an inch in diameter (about the thickness of a dime) can waste 6,300 gallons of water per month.

Since 2013, the proactive Leak Detection Program has identified 292 leaks that have been repaired by the District, resulting in an average annual savings of $54,000 per year from reduced water losses.

“The Otay Water District conducts inspections annually in different communities we serve,” said Otay System Operations Manager Jake Vaclavek. “It is more critical than ever to insure we are not wasting water as we cope with our state’s ongoing megadrought.”

Workers conduct inspections weekdays through April

An effective Leak Detection and Repair Program is one of the main components for water conservation and an important part of asset management. Photo: Otay Water District leak prevention

An effective leak detection and repair program is one of the main components for water conservation and an important part of asset management. Photo: Otay Water District

Customers may see workers inspecting the meter in front of their home or business, typically between 7 a.m. and 5 p.m., Monday through Friday. Weekend and night work may also be required. Inspections can range from a few minutes to a full day.

Inspection workers will wear a Utility Services Associates logo and carry company identification. They will not need access to the homes or property of customers. They may contact customers if they need to momentarily shut off their water supply for further testing. Water supply will not be shut off without permission from someone at the home or property.

The Otay Water District will continue its annual leak inspection through April. Photo: Otay Water District

Workers might lift water meter covers, inspect, and attach equipment to meters or valves. If they suspect a leak, the Otay Water District will contact the customer and advise them of the potential leak.

For questions on the Otay Water District Leak Detection Program, contact customer service at (619) 670-2222.

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

Work Begins on Water Authority’s Historic First Aqueduct

/in , , /by /Water News Network Quoted: San Diego County Water Authority

The San Diego County Water Authority’s First Aqueduct will be shut down periodically over the next four months as work begins for maintenance projects  to ensure a safe and reliable water supply for the region. A series of three shutdowns on the First Aqueduct is scheduled from December through March, when portions of the aqueduct will be relined, along with other maintenance.

As work begins, the Water Authority and its member agencies are coordinating to minimize impacts to residents and businesses, while servicing pipelines that are more than 65 years old.

Customers of these affected retail agencies during the Dec. 5-14 shutdown should check with their local water utility if they have questions about localized impacts: Fallbrook Public Utility District, Rainbow Municipal Water District, Rincon del Diablo Municipal Water District, Vallecitos Water District, Valley Center Municipal Water District, Vista Irrigation District, and the Yuima Municipal Water District.

“Proactively managing our water delivery system in coordination with our member agencies ensures we continue to provide a safe and reliable supply that serves the region’s 3.3 million residents and our $240 billion economy,” said Eva Plajzer, the Water Authority’s director of operations and maintenance. “It requires an extraordinary amount of work each fall and winter during the shutdown season to take care of this critical infrastructure.”

Maintenance work on pipelines is scheduled during low-demand periods to minimize impacts on water service. The other scheduled shutdowns on the First Aqueduct are January 23 to February 1 and February 27 to March 8. The February 27 to March 8 shutdown will also impact the Helix Water District and the cities of San Diego, Poway and Ramona.

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Sweetwater Authority Approves Pipeline Projects in Bonita and the City of National City

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Chula Vista, Calif. – The Sweetwater Authority (Authority) Governing Board approved $2.4M in pipeline projects in Bonita and National City to ensure continued reliable water service for customers. The Board voted to approve these projects at its April 27 Governing Board meeting. SRK Engineering was awarded the contract for construction that will begin in June 2022.

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Water infrastructure-Olivenhain Municipal Water District-Base paving along El Camino Real across from Camino Encinitas Plaza, just north of Via Montoro. Photo: OMWD joint project by Olivenhainv

Joint Project By Olivenhain MWD and City of Encinitas Reaches Final Phase

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The El Camino Real Potable Water Pipeline Replacement and Green Bike Lane Striping Project has reached its final stage. After the Olivenhain Municipal Water District Board approved filing of a notice of completion for the pipeline portion of the project, the City of Encinitas will finish restoring the street and complete new bike lane striping.

The original pipelines were installed in 1961 and 1974 and fast approaching the end of their lifespan. OMWD replaced approximately 4,700 linear feet of existing 12-inch diameter potable water pipeline along North El Camino Real from Encinitas Boulevard to Garden View Road, and approximately 650 linear feet of existing 12-inch diameter pipeline between Via Molena and Mountain Vista Drive. Water service lines and fire hydrant laterals served by the existing pipelines were also replaced.

The pipeline replacement will reduce water loss and prevent emergency shutdowns due to leaks. This is vitally important for water conservation and to ensure water supply reliability for businesses and residents, more important than ever due to drought conditions in the region.

“Proactive maintenance is a big part of what we do,” said Olivenhain Municipal Water District Board President Larry Watt. “Replacing aging infrastructure before it breaks helps to avoid emergencies, which are more costly and more impactful to customers.”

Coordination minimizes community inconvenience

Lowering a section of the new potable water pipe into a trench in El Camino Real joint project by OlivenhainLowering a section of the new potable water pipe into a trench in El Camino Real joint project by Olivenhain

Lowering a section of the new potable water pipe into a trench in El Camino Real. Night work helped minimize the inconvenience to nearby businesses and homes. Photo: Olivenhain Municipal Water District

To mitigate the impact to the surrounding community, OMWD coordinated with the City of Encinitas on its green bike lane project along the same route. The District implemented the lane restriping portion of the project on behalf of the City of Encinitas concurrently with the pipeline replacement project as an efficiency measure.

As a result, the two agencies combined what would normally be two separate, unrelated infrastructure improvement projects into a single effort to improve operational efficiency and reduce the temporary inconvenience of disruptions to area residents and businesses.

The bike lane will provide traffic calming measures, including improvements to safety and mobility for bicyclists along North El Camino Real from Encinitas Boulevard to Leucadia Boulevard by restriping and narrowing travel lanes. In addition, green-colored striping will augment some areas on the bike lanes and new signage and pavement markings will be installed.

“It was very important to us from the outset of the project to mitigate its impacts to the community, while also keeping costs down,” said Watt. “To that end, the partnership with the City of Encinitas was critical. They coordinated closely with us every step of the way.”

At the start of the project, the City of Encinitas requested that work be done at night to further reduce traffic impacts. Capitalizing on the reduced traffic as a result of the statewide stay-at-home order, OMWD was able to shift construction to the daytime for a portion of the project. Working during the day is more efficient and safer than night work, and minimized noise impacts to the surrounding neighbors. However, as traffic returned to normal levels, the City shifted work hours back to overnight.

New bike lanes due by December

Dedicated green bike lanes such as this example have an expected December completion date. Photo: Courtesy City of Encinitas

Dedicated green bike lanes such as this example have an expected December completion date. Photo: Courtesy City of Encinitas

The final work effort will include buffered bike lanes on the east and west, and fully restoring three lanes of traffic. Work is anticipated to occur through early December. Traffic controls will be in place during the day and at night with the most significant work occurring at night. Residents and businesses should anticipate lane closures and consider alternative transportation routes.

For questions specific to the City of Encinitas’ Active Transportation Enhancing Project, please email or call 760-943-2211.

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

Working with Hoch Consulting, the Vallecitos Water District inspection project will take place through June. Photo: Vallecitos Water Distict

Vallecitos Water District Taps Tech for Pipeline Inspection

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The Vallecitos Water District is using a specialized camera and sonar to evaluate the condition of a sewer pipeline between San Marcos and Carlsbad.

The Land Outfall West pipeline is a large sewer line that stretches from El Camino Real to the Encina Water Pollution Control Facility in Carlsbad. Originally installed in 1986, an evaluation of the pipeline’s current condition using closed-circuit TV (CCTV) cameras and sonar will help the District identify and prioritize its ongoing pipeline renewal and maintenance activities.

Inspections help ensure system reliability

Field teams begin the inspection process, which is taking place at night to minimize disruption. Photo: Vallecitos Water District

Field teams begin the inspection process, which is taking place at night to minimize disruption. Photo: Vallecitos Water District

The pipeline ranges in size from 24-inches to 54-inches in diameter and is approximately 3.2 miles long. Project Manager Susan Bowman said today’s technology allows the District to perform thorough inspections without digging up streets and disrupting neighborhoods.

“We want to make sure the pipeline is still in good shape,” explained Bowman, who is the District’s asset management supervisor. “We’re going to be taking a look at the inside of the pipe using an advanced CCTV tool. It looks at all of the insides of the pipeline and identifies any flaws or maintenance issues that may need to be addressed.”

Bowman said the District regularly inspects manholes and performs routine inspection activities. Using cameras and sonar will provide more detailed information to help the District plan ongoing maintenance and repair to ensure the pipeline will continue to perform well.

District staff, consulting staff, pipeline inspectors, and environmental inspectors will be onsite during the work. Work started at the east end of the pipeline in Carlsbad, and will follow along Palomar Airport Road under Interstate 5, and end at the Encina Wastewater Treatment Plant.

Cost-effective and less disruptive

Map showing the 3.2 mile stretch of Vallectios Water District pipeline undergoing inspection in June. Photo: Vallecitos Water Diatrict

Map showing the 3.2 mile stretch of Vallecitos Water District pipeline undergoing inspection in June. Photo: Vallecitos Water District

To minimize traffic impacts and to take advantage of lower flow levels, all work is scheduled at night between 9 p.m. and 6 a.m. and will occur on weekdays through June 18. Bowman said most of the work should have limited impact on businesses and residents in the area, with minor compressor noise and limited street blocking along Palomar Airport Road.

Pipeline inspections tap tech

“We want to be good neighbors,” said Bowman. “But it is critical to ensure a pipeline is performing well, it is safe, and it is able to continue to do its job. It’s a cost-effective way to ensure the District’s assets are performing well. The technologies have really improved in the last 15 to 20 years.”

Previously, the only way to inspect a pipeline was to take it out of service and dig it up.

“If you’re going to dig something up to see what shape it’s in, you might as well be replacing it,” said Bowman. “We are definitely looking at a lot of these different noninvasive type of technologies. It helps the system perform better by reducing unplanned emergencies which are disruptive to all of us.”

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

The City of San Diego's aggressive maintenance program has resulted in fewer water main breaks in 2020. Photo: City of San Diego

Water Main Breaks Decline in San Diego for Fourth Year in a Row

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Increased maintenance efforts by the City of San Diego of its water system infrastructure is paying off for ratepayers. For the fourth year in a row, the number of water main breaks has decreased in the City of San Diego. Thirty-three water main breaks were reported in 2020, the lowest total in more than 15 years.

The City credits its aggressive multi-year program to replace aging pipelines for bringing the numbers far below the peak of 131 breaks in 2010.

“The City’s Public Utilities Department has worked very hard to improve the reliability of our water system infrastructure,” said Shauna Lorance, director of public utilities. “Our citizens benefit greatly from fewer main breaks because it means less water loss and lower emergency repair costs.”

Fifty-five miles of pipeline replaced in next four years

Crews replace old cast iron pipe with new PVC pipe along Park Boulevard. Photo: City of San Diego

Crews replace old cast iron pipe with new PVC pipe along Park Boulevard. Photo: City of San Diego

San Diego’s continuing program to replace old cast iron water mains has played a major part in the decrease in breaks. Some cast-iron pipes had been in service for more than a century. Since 2013, the city has replaced approximately 180 miles of water pipelines. By 2025, the last 55 miles of cast iron water mains are scheduled to be replaced with water mains made of durable polyvinyl chloride.

Water infrastructure maintenance programs also deliver a benefit to our region’s overall economy. According to the Economic Policy Institute, $188.4 billion spent on water infrastructure investments over five years would yield $265 billion in economic activity and create 1.9 million jobs.

“Improving and maintaining our water infrastructure is an important part of our commitment to serving our customers,” said Lorance. “We will continue to provide reliable water services our customers deserve.”

City of San Diego public utilities crew members replace an aging cast iron water pipe at 5th and Robinson in Hillcrest. Photo: City of San Diego water main breaks

City of San Diego public utilities crew members replace an aging cast iron water pipe at 5th and Robinson in Hillcrest. Photo: City of San Diego

City of San Diego public utilities crews routinely oversee preventative maintenance work to help determine potential leaks and breaks before they occur. Private contractors have completed the bulk of the pipeline replacement projects under the direction of the City’s Engineering and Capital Projects Department.

Regular valve maintenance prevents unanticipated shutdowns of water service to Vallecitos Water District customers. Photo: Vallecitos Water District

Vallecitos Water District Valve Maintenance Program Ensures Reliable Service

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Just as owners perform routine maintenance to keep their cars running smoothly, water systems need regular maintenance to provide reliable service. The Vallecitos Water District’s Valve Maintenance Program ensures these vital components in its water distribution remain in good working condition throughout the District. Valves left without proper maintenance for long periods can become a serious problem, especially in an emergency water shutdown.

VWD’s Construction Department manages the program. Two-person teams use maps to familiarize themselves with the location of the 4,959 valves in the system, not including fire hydrants and fire services. Critical valves serve hospitals and businesses. Between 300 and 500 valves are serviced monthly, following American Water Works Association standards.

Small but vital parts monitored

Construction worker Justin Shutt explains valves are isolation and shutoff point for water mains along streets.

“If we have a main break, where a main ruptures, we need to be able to isolate those certain sections without taking too many people out of water” by shutting the valves, said Shutt.

Valve Maintenance Technician John Truppa runs the valve maintenance program. He trains crew members how to use the valve exerciser machine, read maps properly, and respond to customer calls. Customer service is a priority. When a customer reports a water line leak in their home, the valve maintenance crew helps by shutting off the water at the meter.

The Vallecitos Water District’s geographic information system provides a written record of valve location, condition, maintenance, and inspection records for each valve serviced. Reliable recordkeeping is vital to ensure all valves receive regular maintenance and are replaced before coming to the end of their service life to reduce the percentage of failures and inoperable valves. The District monitors valve life span to replace them prior to failure. Areas prone to water main breaks and valves on mains serving large groups of customers get added attention.

Taking turns

Between 300 and 500 valves are serviced monthly by two person teams. Photo: Vallecitos Water District

Between 300 and 500 valves are serviced monthly by two-person teams. Photo: Vallecitos Water District

Valve maintenance involves performing a prescribed number of turns to “exercise” or test the valve. Turns are calculated in part by the size of the main. Larger transmission water mains require more valve turns, both up and down. Turning speed is also important. If valves are closed too quickly, it creates “water hammer,” or sudden pressure forcing water down the line, potentially triggering water main breaks. You may have heard a water hammer in your house when you shut off a household valve suddenly.

Ounce of prevention

The District's geographic information system (GIS) provides a written record of valve location, condition, maintenance, and inspection records for each valve serviced. Photo: Vallecitos Water District

The Vallecitos Water District’s geographic information system provides a written record of valve location, condition, maintenance, and inspection records for each valve serviced. Photo: Vallecitos Water District

Regular valve maintenance prevents unanticipated shutdowns of water service to Vallecitos customers.

“We want to take as few people out of water at a time as we possibly can,” said Shutt. “We keep up on the upgrades and make sure the valves are working the way they’re supposed to.”

The proactive approach by the Vallecitos Water District ensures the reliable delivery of quality water to its customers while ensuring all systems are working properly.

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.

 

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