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Regional Conveyance Study-RCS-Water Supply

Water Authority to Host Public Session on Economics of Regional Conveyance Study

The San Diego County Water Authority will host an online public information session on Oct. 27 about economic considerations related to the proposed Regional Conveyance System. The virtual event will run from 10 a.m. to noon. To reserve a spot, email .

Meeting participants can:

  • Learn about alternatives the Water Authority Board of Directors is studying to secure San Diego County’s future water supplies
  • Ask the experts about key issues
  • Understand the feasibility and costs of building a conveyance system to deliver San Diego County’s Colorado River supplies
  • Discuss potential next steps

In June of 2019, the Water Authority’s Board of Directors approved a study of the viability of a new regional conveyance system that would deliver water from the Colorado River to San Diego County and could provide multiple benefits across the Southwest.

Regional Conveyance Study

The Phase A report, released in August 2020, found that building a new conveyance system to transport the region’s supplies from the Quantification Settlement Agreement is cost-competitive with other long-term strategies for meeting the region’s water needs.

At its August 2020 meeting, the Water Authority’s Board decided to continue the regional discussion about the study until November 19, at which time the Board is expected to decide whether to move ahead with Phase B of the study.

To learn more about the Regional Conveyance System Study or to read the executive summary and the full report, go to

Potential pipeline routes

Regional Conveyance Study-RCS-Economics-Water Supply

A study of a new regional water conveyance system to deliver high-priority Colorado River supplies from the Imperial Valley shows three potential routes to move the water. Graphic: San Diego County Water Authority

Each of the potential conveyance routes would connect to the tail end of the All-American Canal where it meets the Westside Main Canal in the southwest corner of Imperial Valley.

La Niña May Signal Scant Relief from California’s Seemingly Endless Loop of Hot, Dry Weather

After a brief interlude of mild temperatures Saturday, a warm-up is forecast to begin Sunday as upper-level high pressure builds into California, the National Weather Service said. High temperatures will climb by several degrees on Sunday.

As Wildfires Ravage the West, Contaminated Water Raises Health Concerns

A few weeks after the devastating 2017 Tubbs Fire raged through parts of northern California, Gerald and Serene Buhrz returned to their Santa Rosa home, turned on the kitchen sink faucet, and were hit with a stinging smell.

Reservoir Release Pilot Project on the Colorado River

A new experiment is looking into how drought conditions, like we’re currently in, can affect water traveling downstream the Colorado River. The pilot project involved shepherding water from a high mountain reservoir to the Colorado-Utah state line. The project is a partnership between Colorado Springs Utilities, Aurora Water and Pueblo Board of Water Works.

Vast New Reservoir in South Orange County Gets Its First Drops of Water

Right now, it’s just a huge hole in the hills off Ortega Highway in San Juan Capistrano. Really huge, as it’s designed to hold 1.6 billion gallons of water.

It’s still dry as dirt, but promises to be a central component of future water supplies for the 165,000 people served by the Santa Margarita Water District. While the district currently imports 100% of its drinking water from  the Colorado River and northern California, the new Trampas Canyon Reservoir is part of a plan to generate 30% of potable water supplies locally and to recycle more wastewater.

Cal Am, Marina Open to Meeting on Desal Project ‘Solution’

California American Water and Marina city officials are in the process of setting up talks on the company’s desalination project after exchanging letters over the past several weeks. In a Sept. 25 letter, Cal Am president Rich Svindland reached out to Marina officials, proposing talks aimed at resolving differences over the company’s paused desalination project and suggested a series of “possible options that could be mutually beneficial for the city, Cal Am, and the region as a whole.”

What’s Green, Soggy and Fights Climate Change?

Protecting intact peatlands and restoring degraded ones are crucial steps if the world is to counter climate change, European researchers said Friday. In a study, they said peat bogs, wetlands that contain large amounts of carbon in the form of decaying vegetation that has built up over centuries, could help the world achieve climate goals like the limit of 2 degrees Celsius of postindustrial warming that is part of the 2015 Paris agreement.