![]() The Draft Study’s finding that the project is economically competitive with other supply and transportation options is not reasonable. ![]() Their conclusion (which surfaced last week at a meeting of the Vallecitos Water District board, the report starts on pdf page 82): 18 of the 24 member agencies, representing by my calculation 89 percent of the Authority’s water use, went out and hired their own consultants to take an independent look at the numbers. The idea that this is cost effective in the long run, being pushed hard by San Diego County Water Authority management, does not seem to be shared by the authority’s member agencies. (The minutes are here if you’re curious, the questions were interesting.) In a net present value calculation, the Water Authority has been arguing, it would be cheaper. Denham laid out the Water Authority’s basic argument – that with anticipated increases in the cost of getting its water through the existing Metropolitan system, it makes sense for the Water Authority to consider building its own pipe. In the summer of 2019, on a trip to Imperial Valley to gather stuff for a new book I’m writing hoping to start working on again when the pandemic fog clears, I heard a fascinating presentation about the project from San Diego County Water Authority Assistant General Manager Dan Denham to the Imperial Irrigation District board. As is often the case with regional water authorities of this sort, its board of directors is made up of representatives of each of the member agencies.Ĭonceptual map for possible routes for a new San Diego pipeline to carry Colorado River water The Water Authority is a creation of state law that serves as a water wholesaler and system integrator across territory served by 24 member agencies, large and small. I’ve been careful in my language here to talk about “the San Diego County Water Authority”, rather than “San Diego” writ large. But an arcane legal and financial and cultural feud (c’mon L.A., know you hate the Padres) between the San Diego County Water Authority and the Los Angeles-based Metropolitan Water District of Southern California has led the San Diego County Water Authority to pursue a pipeline of its own, so that it would no longer be beholden to Met. So San Diego already has a way to get the water. That water currently is delivered via exchange agreement through the existing Metropolitan Water District Colorado River Aqueduct. I was grinding through these numbers as I puzzled over the San Diego County Water Authority’s scheme to build a new pipeline across the desert to carry its supplies of Colorado River water – ~280,000 acre feet a year of water it got through various agricultural efficiency projects in Imperial Valley. ![]() Since its 2002 peak, total San Diego County Water Authority use has declined by 27 percent, even as the county’s population has risen by 15 percent. To be clear – the new study, done out of fears that the last study had overestimated demand, itself overestimated demand. So how has the new “demand reset” analysis held up? Actual water use in 2019 was 14 percent lower than the projection made in 2018, just one year earlier. Demand calculations published in the agency’s state-mandated Urban Water Management Plan, the “demand reset” analysis found, had inflated near-term water demands (water needed by 2020) by 9 percent. ![]()
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