Proposed desalination projects opposed by environmentalists

Not enough rain this year, more than we needed last year.  Population growing outside Pacifica.. Sea level rising.  Where will we get our water?  Part of the answer may be advanced desalination. Desalination  is currently used in dry areas of the United States and in other countries where water is scarce.  

Palo Alto Daily News/Bonnie Eslinger, 2/4/12. "Among many challenges facing the controversial Redwood City Saltworks project, securing water for a community that may have as many as 12,000 homes is high on the list. DMB Pacific Ventures, a new company owned by Arizona-based DMB Associates that wants to develop Saltworks on Cargill's salt flats, has promised not to tap into Redwood City's limited water supply to hydrate the massive 1,436-acre project, which also would include office buildings, stores, schools, playing fields and restored marshlands.

Until recently, DMB has been focusing on a complex maneuver to transfer the rights to 2.7 billion gallons of water a year purchased from a Bakersfield farming collective to a Bay Area water agency for delivery. While the transfer strategy is still "on the table," the company also is examining whether delivering ocean or bay water stripped of salt and other minerals is feasible, said David Smith, DMB Associates' senior vice president. That process is known as desalination. "We're looking at the full universe of options," Smith told The Daily News on Friday.

Desalination eats fishes, solve that.

Although many water agencies and cities are studying desalination as a possible answer to water shortages, Smith acknowledged it's a complicated route. In the North Bay, a proposed desalination plant in San Rafael was successfully challenged in court by environmentalists and others concerned that its potential impact on marine habitat wasn't fully studied.  The Marin Municipal Water District recently appealed the court's ruling that the environmental impact report was inadequate. "And while the city of Santa Cruz is currently doing an environmental study for a desalination plan, opponents are gathering petition signatures to put the project before voters for approval.

Rich Mills, a water use and efficiency expert with the California Department of Water Resources, said environmental concerns about desalination are legitimate, such as the potential for fish and other marine life to be sucked into treatment plants. But desalination is being considered out of necessity, he added. "As the demands for water continue to increase and the development of new water supplies becomes more difficult, we're having to research all alternatives -- conservation, water recycling of municipal waste water, desalination and urban storm water runover recovery and use," Mills said. "These are kind of the less-than-mainstream water resources that are being looked at more carefully now."

A DMB-funded consultant hired by Redwood City to do an environmental study of the Saltworks project began investigating desalination as a feasible option last June, said Blake Lyon, the city's senior planner. Questions such as where a plant would go, how big it might be and whether it should provide water only for Saltworks still have to be answered, he said. "There's also a lot of work that needs to be done on the environmental implications, whether there's political support for it, and the funding aspects," Lyon said. But the research was temporarily shelved in November when DMB Associates asked for a timeout while the developer reviews the most recent round of public comments and possibly revises the project. Smith said the company intends to present a revised plan by "early 2012."

Josh Sonnenfeld, a campaign manager with Oakland-based Save the Bay, said DMB's struggles to secure water for the large-scale community prove the project is impractical. "There's also enormous numbers of questions we have about desalination, the impacts on the bay, the potential costs to residents and the energy it needs." The nonprofit has vigorously opposed the Saltworks development plan and advocated for restoration of the area's natural habitat"  Really, no solution is better?

References: 

Southern California pilot project eco-article, Natural Resources News Service/David Rosenfeld, 1/4/12.

World view. Expensive, but used to off-set critical water shortage, Wikipedia.

"Provide access to clean water" article, National Academy of Engineering.

Posted by Kathy Meeh