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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.

 

 

 

Pumped Energy Storage-Lake Hodges-Olivenhain

Water Agencies Help Address California Energy Shortages

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Water agencies across San Diego County are doing their part to stabilize the state’s power grid during this week’s heatwave by generating hydropower and altering operations to trim electricity demands – and they are offering long-term solutions to reduce future energy shortages.

The California Independent System Operator issued a statewide Flex Alert from Sunday through Wednesday, calling for reduced electricity use in the afternoon and evening to limit power outages. Blackouts could affect hundreds of thousands of San Diego County residents, if extreme heat persists.

California ISO-heatwave-energy shortage-rolling blackouts

Producing and conserving power during energy shortages

At Lake Hodges, the Water Authority is running its pumped energy storage facility to meet peak demands. As water flows down the pipeline from Olivenhain Reservoir into Lake Hodges, it generates up to 40 megawatts of energy on demand, helping to manage temporary peak electrical demands or unplanned outages. Then, the water is pumped back to Olivenhain Reservoir when power demands are low to restart the cycle.

In addition, water agencies are taking numerous actions to conserve energy. For the Water Authority, the strategy includes temporarily reducing drinking water production at the Claude “Bud” Lewis Carlsbad Desalination Plant in collaboration with Poseidon Water.

The Carlsbad Desalination Plant is the largest, most technologically advanced and energy-efficient desalination plant in the nation, and it has produced more than 62 billion gallons of drinking water for San Diego County since it began operations in December 2015.

Starting Monday, the plant ramped down operations, making an additional 8 megawatts of power available for other uses. If more load reductions are necessary over the next several days, additional curtailment may be considered at the plant. The power provided by the plant could help offset current energy shortages.

“This partnership by the Water Authority and Poseidon is another reminder of the value of the cutting-edge technology and local control at the Carlsbad plant,” said Jim Madaffer, chair of the Water Authority’s Board of Directors. “Operations are flexible and the technology is nimble, so production can be ramped up and down in response to local needs.”

Water agencies respond to energy shortages

In addition, local and regional water agencies are temporarily shutting down or reducing flows at pump stations and turning off HVAC systems in the afternoons. Some agencies also have the ability to convert to less energy-intensive treatment, for instance, by replacing ozone with chlorine.

Local water agencies also are tapping their significant backup power generation capacity – at their own expense – to ease the strain on the energy grid, following Governor Newsom’s executive order that suspends some regulatory requirements for those units during this emergency event. Local agencies are also looking to work with the administration to ensure that their backup generation capacity can be used proactively to help avoid future energy shortages.

 

Pumped Energy Storage-WNN-June 2020-graphic

Pumped energy storage facilities are part of an integrated and sustainable energy system that
includes the production, storage and distribution of clean energy.

Environmentally friendly pumped storage project proposed

Beyond the immediate concerns, this week’s heat wave has highlighted the need to increase large-scale energy storage as the state moves toward a goal of 100% renewable energy by 2045. Put simply, the sun doesn’t always shine and the wind doesn’t always blow enough to meet demands, so the state needs more capacity to store peak renewable energy production for peak demand periods.

The Water Authority has proposed building a large-scale pumped storage project at the San Vicente Reservoir near Lakeside. Pumped energy storage projects are designed to store excess renewable energy from solar and wind when it’s available, and then discharge that energy when energy demands increase and renewable energy is scarce.

Solutions for long-term energy challenge

A 2019 white paper highlighted the importance of pumped energy storage to California’s future.

“Our current situation is the direct result insufficient planning; the state clearly needs additional energy storage now and will need much more in the future,” said Gary Bousquet, energy program manager for the Water Authority. “Environmentally friendly pumped storage projects should be started immediately to address this shortfall, or power reliability will get significantly worse. The San Vicente project can be started now at no cost to taxpayers – users only pay when the project comes online.”

Carlsbad Desalination Plant Supports Statewide Energy Conservation Efforts

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Carlsbad, Calif. (August 18, 2020) –To support statewide emergency energy conservation efforts, Poseidon Water and the San Diego County Water Authority are temporarily reducing water production at the Claude “Bud” Lewis Carlsbad Desalination Plant.

While the plant uses less than 1% of peak energy demand in San Diego Gas & Electric’s service territory, Poseidon and the Water Authority are committed to supporting electrical reliability while ensuring continued delivery of safe and reliable water supplies.

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Final Judgment Entered in Favor of Water Authority in 2010-2012 Rate Litigation

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A Superior Court judge has awarded the San Diego County Water Authority $44,373,872.29 in a final judgment for two cases covering rates paid by San Diego County ratepayers during calendar years 2011-2014. The award included $28,678,190.90 in damages for the Metropolitan Water District of Southern California’s breach of contract for the four years at issue, plus pre-and post-judgment interest.

The Water Authority has worked for more than a decade to resolve disputes with MWD in cases filed from 2010-2018. In February, the Water Authority’s Board of Directors voted to dismiss certain issues from the litigation after securing more than $350 million in local project subsidy benefits for the San Diego region, beginning late last year. In doing so, the Water Authority also acknowledged the MWD Board action to stop imposing the district’s Water Stewardship Rate as a charge for transporting the Water Authority’s independent water supplies through MWD facilities, thus resolving for now that issue in future rate years. Consistent with the Water Authority Board’s direction, its attorneys are taking the steps necessary to narrow the litigation and have recently dismissed one case in its entirety.

“Entry of final judgment caps a 10-year effort by the Water Authority Board of Directors on behalf of San Diego County ratepayers, proving once again our region is stronger together in charting our water future,” said Jim Madaffer, chair of the Water Authority’s Board of Directors. “While the damages and interest award is important, the entry of judgment will also help avoid future overcharges and thereby minimize future disputes based on rulings by the Court of Appeal.”

As the lawsuits continue to wind down, the Water Authority is working collaboratively with MWD member agencies across the district’s six-county service area to update MWD’s long-term water resource and financial planning. MWD’s Integrated Resources Plan, or IRP, will be its roadmap for the future, factoring in updated data and plans by many MWD member agencies to develop local water supplies such as the Water Authority and its member agencies have done over the past two decades and will continue to do in the future.

In its judgment, the San Francisco Superior Court:

  • Determined that MWD breached the Exchange Agreement by including its Water Stewardship Rate in the transportation rates it charged to the Water Authority. Damages for the four years at issue are awarded in the amount of $28,678,190.90, plus pre- and post-judgment interest, bringing the grand total for these four years to almost $45 million. Such improper charges on the Exchange Agreement, if they had continued from MWD, would have cost San Diego County residents more than $500 million over the life of the Water Authority’s water delivery contract with MWD.
  • Acknowledged the required increase in the Water Authority’s preferential rights to MWD water by approximately 100,000 acre-feet a year, equivalent to about twice the annual production of the $1 billion Carlsbad Desalination Project. MWD had earlier complied with the appellate court ruling to this effect and corrected its records accordingly.
  • Confirmed that MWD had illegally barred the Water Authority from MWD’s demand management programs by the inclusion of an unlawful contract provision. MWD lifted the ban in response to the Court of Appeal ruling and has since that time approved nearly $500 million for water supply projects in San Diego County. The initial approvals of $350 million beginning late last year increased with the MWD Board’s approval in June of two more projects totaling an additional more than $115 million.
  • Granted declaratory relief that 1) the inclusion of the Water Stewardship Rate in MWD’s published wheeling rate and under the Exchange Agreement is unlawful and invalid; and 2) MWD’s “Rate Structure Integrity” clause barring the Water Authority from receiving demand management program benefits is invalid and unenforceable as an unconstitutional condition.
  • Ordered that a preemptory writ of mandate would issue, commanding MWD to enact only legal wheeling and transportation rates in the future.

The Court will retain continuing jurisdiction over the cases. A hearing will be held later this year to determine the prevailing party’s right to recover attorneys’ fees and costs.

With a judgment issued in the first two cases, the Water Authority is also working to narrow the scope of the remaining 2014, 2016 and 2018 cases (a 2017 case has already been dismissed).

“Like most court proceedings, it will take a little time to work through all the details,” said Water Authority Board Secretary Christy Guerin, who led the most recent litigation settlement efforts for the agency. “We recognize that MWD is at an important crossroads, and we look forward to working with the other MWD member agencies on charting a future course to ensure both a reliable Southern California water supply and MWD’s fiscal sustainability.”

Click here for more information about the rate case litigation, including the final judgment in the 2010 and 2012 cases.

Vista Irrigation District Logo

Vista Irrigation District Will Not Increase Water Charges in 2020

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Vista, Calif. — At its August 5 meeting, Vista Irrigation District’s Board of Directors voted not to increase its water service charge in 2020 in an effort to support its customers facing financial challenges during the COVID-19 pandemic.

“Our board is concerned about the financial impacts that our customers are facing,” said Vista Irrigation District Board President Richard Vásquez. “Prudent financial planning and budgeting has provided the district with the opportunity to not raise its rates in support of its customers during this challenging and uncertain time.”

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Otay Selects El Cajon Homeowner as Winner of the WaterSmart Landscape Contest

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Spring Valley, Calif. – At its virtual Board of Directors meeting on August 5, the Otay Water District Board recognized El Cajon resident Patricia Wood for taking the title of “Best in District” in the Otay Water District’s 2020 WaterSmart Landscape Contest. Her landscape demonstrates a well thought-out design, methods for efficient irrigation, and appropriate plant selection and maintenance.

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Imperial County Agencies Deliver 500,000 Face Masks to Agriculture Workers

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The Imperial County Agricultural Commissioner’s Office has taken the lead in distributing more than 500,000 face masks to all sectors of the agriculture industry in the Imperial Valley.

“This was a positive result of the state understanding our need,” said Imperial County Agricultural Commissioner Carlos Ortiz. “They heard us.”

Agriculture is one of the essential sectors critical to health and safety in California during the coronavirus pandemic.

Since May, 566,000 face masks have been distributed to 126 agricultural-based businesses, including growers, farm labor companies, pest control, feed lots, trucking companies, hay presses and the dairy industry. Face masks have also been provided to agencies that work with farm workers, including Campesinos Unidos and Clinicas De Salud Del Pueblo.

State, local agencies collaborate for worker safety

The distribution of face masks to the agricultural community was part of a joint statewide effort of the California Agricultural Commissioners and Sealers Association together with the California Department of Food and Agriculture and the Department of Pesticide Regulation. The California Office of Emergency Services provided 824,000 face masks.

Ortiz said there is a rewarding feeling that comes from working with a team to respond to a local need.

“The fact we have received these masks from the state points to how critical agriculture is as an essential service to keep food on the table, especially during these challenging times,” said Ortiz. “Everyone in agriculture deserves praise for the work they are continuing to do.”

A survey was first sent to the Imperial Valley agricultural community, and there was an overwhelming response that personal protective equipment, starting with face masks, were a critical need.

“The reaction to the survey let the state know there was an immediate need,” said Ortiz.

The county will also be receiving special N-95 respirator masks, that will be distributed to agriculture workers that handle applied pesticides which require special respirator equipment, according to Ortiz.

Face masks ‘vital’

J Rollins, Vice President and Operations Manager of Rolling R Enterprises, a local family-owned custom harvesting and hauling company, said his company received face masks for his employees at a time that masks were very difficult to find through normal retail or wholesale avenues.

“Aside from our sanitation protocols, the masks we received from the Ag Commissioner’s Office was vital in keeping our workforce healthy, especially at the peak of our operations,” said Rollins.

Imperial Valley-Agriculture-COVID-19-face masks

In the midst of the coronavirus pandemic, Imperial Valley vegetable farmers took additional precautions during the Spring 2020 harvest. Photo: San Diego County Water Authority

Timely delivery of face masks

Along with mask distributions, the Agricultural Commissioner’s Office has provided masks to individual farm workers and crews while doing field inspections.

“You are trying to focus on what else you can do to get the face masks to those who need them,” Ortiz said.

Imperial County Farm Bureau Executive Director Brea Mohamed said she was grateful for the mask distribution, adding the masks are helping growers ensure the safety of their employees and crews.

When the pandemic hit Imperial County, growers faced heavy costs to purchase such personal protective equipment, which placed further strain on their operations at a difficult time. It was also a challenge to find enough face masks to serve the local need of agricultural, she said.

Despite the coronavirus, agricultural work had to continue, said Mohamed.

“This hit right at the end of the produce harvest and just as we were starting to harvest corn, then came onions and melons,” she said. “Plus the feedlots and forage crops are year-round.”

Going forward, Mohamed said she is hopeful there might be additional help with other personal protective equipment, like hand sanitizers and sanitizers for farm equipment.

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.

 

Sweetwater Authority Logo 2019Sweetwater Authority Logo 2019

Sweetwater Authority Wins Statewide Award for Hydro Station Education Experience

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Chula Vista, Calif. – On Wednesday, July 22, the Sweetwater Authority (Authority) Governing Board was presented with the California Association of Public Information Officials (CAPIO) Award of Distinction for excellence in public information and communications. The Authority received the award earlier this month for its innovative communication for the Hydro Station Education Experience.

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