When Sonia Herbert, 78, opened a restaurant in Bombay Beach, a small California neighborhood about 80 miles northeast of San Diego, she welcomed the bustle of tourists and locals visiting the Salton Sea shoreline. Located in Imperial County, the lake and its wetlands offer crucial habitats for migratory birds and a refuge for people from the hot desert sun.
In the Central Valley, agriculture is everything. Farmers here grow 25% of the country’s food, yet copious amounts of flawed produce is dumped or left to rot.
For many supermarkets, an orange with a hail scratch is deemed unsellable. In 2019, researchers from Santa Clara University found that an estimated one-third of food in northern and central California is wasted, largely because of supermarket standards and consumer habits. We cannot follow this model of growing more produce than we need – or wasting this much – given California’s limited water resources, drought on surface water, and severe overpumping of groundwater.
California officials are poised to decide the fate of a controversial desalination plant planned along its southern coast, in a vote that comes as the American west battles an increasingly perilous drought.
California water use leapt 19% in March, amid one of the driest months on record. After more than a decade of debate, the California coastal commission on Thursday will finally vote on a proposal for a $1.4bn desalination plant in Huntington Beach, south of Los Angeles.
In its efforts to maintain its critical infrastructure, the Vallecitos Water District undertook a challenging update to a wastewater system pipeline constrained by its precarious location.
The existing eight-inch gravity sewer pipeline conveys wastewater from the intersection of Rock Springs Road and Bennett Avenue west through a greenbelt area to an existing 12-inch pipeline in Rock Springs Road at Lancer Park Avenue. To expand capacity for current and future growth, it was replaced with a new 15-inch PVC pipe west of Matthew Lane and a 12-inch PVC pipe north and east of Matthew Lane.
The location of the affected manhole put equipment and crews close to a SDG&E gas line inside a greenbelt park area. Photo: Vallecitos Water District
The District always prefers to perform work in a street or public right-of-way. Neither were possible for this project due to its greenbelt and park location within feet of residential homes.
“We took every environmental precaution prior to construction,” said Lito Santos, Vallecitos Water District Project Engineer. “We performed a nesting survey, a raptor survey, and we also worked to tunnel under the bridge,” within the Environmental Protection Agency’s “Clear Water Rule.”
San Marcos Woods Homeowners Association board member Ross Fisher acted as a liaison between homeowners and the HOA with the District. Fisher expressed concern about access to the work area by the District’s large combination truck. The original proposal to create a concrete strip to drive over wasn’t feasible.
Due to its incredible strength, the grass-crete and existing lawns can handle the weight of a large service vehicle driving on it without significant damage. Photo: Vallecitos Water District
Working together with Vallecitos Water District engineers, the group chose an alternative material called “grass-crete.” Grass-crete is a green porous paving solution that comes in easy-to-install rolls. It’s flexible, lightweight, durable and provides design versatility to the project. Due to its incredible strength, the grass-crete and existing lawns can handle the weight of a large service vehicle driving on it without significant damage.
Manholes were waterproofed, coated, and sealed as an additional precaution and to extend their longevity. Photo: Vallecitos Water District
Vallecitos Water District engineers also worked with San Diego Gas & Electric to perform its work with enough safety clearance from a 16-inch transmission main artery gas line pressurized at 800 pounds per square inch. The District secured permission to dig within two to three feet from the line instead of the standard five feet.
The work area is also prone to flooding after large rain events, raising the water levels in the nearby creek high enough to infiltrate and inflow into the manholes. The District moved the manholes clear of the creek embankment, and lifted the manholes two feet above ground and clear of the flood plain to prevent runoff intrusion. Manholes were waterproofed, coated, and sealed as an additional precaution and to extend their longevity.
The District moved the manholes clear of the creek embankment, and lifted the manholes two feet above ground and clear of the flood plain to prevent runoff intrusion. Photo: Vallecitos Water District
“Overall Vallecitos left the greenbelt area as good or better when they started,” said Fisher of the HOA. “On a scale of one to ten, I have to give them a 9.5 or a ten. Working with the inspectors and Lito Santos the engineer, everything we asked for was done in a timely manner.”
“The project was a huge success,” said Santos. “Working with the Vallecitos Engineering Team, the Inspection Team and Mr. Fischer, it was not just a Vallecitos highlight but a career highlight.”
West Basin Municipal Water District released on Wednesday, Oct. 23, the final environmental impact report for an El Segundo desalination plant that would convert 20 million gallons per day of seawater into fresh drinking water.
The plant would sit on up to 13 acres next to the El Segundo Generating Station, at 301 Vista del Mar.
The final environmental report includes responses to more than 200 questions submitted during a 91-day public review period that ended June 25, 2018. The district board will consider certifying the report at a special board meeting at 3 p.m. Nov. 18 at Carson Event Center.
The Water News Network is San Diego County’s source for water news and information.
