The second largest reservoir in the Santa Clara Valley was only at 39% capacity Tuesday and the water agency doesn’t expect things to improve for several years.
Lexington water levels are expected to stay low, even if there’s an abnormally high rainy season.
The other reservoirs in the county aren’t doing much better with Guadalupe Reservoir at a startlingly low 18% and the future doesn’t look so bright for that one either.
“I’d say for the next decade, how you see the reservoirs now is how it’s going to be in the future,” said Chris Hakes, dam safety expert at the Santa Clara Valley Water District.
He updated the agency’s board on the progress of the seismic retrofit of its largest reservoir, Anderson, in Morgan Hill. It’ll be another decade before that one is back up and running again.
So, in the meantime, the agency has to get creative to ensure the valley’s water supply is intact — even in this drought emergency.
“Well of course we’re concerned about that. We do look at the water supply sources that we currently have,” said John Varela, Valley Water Board Chair. “We do import much of our water from the Sierra, to the delta. Pumps up to San Luis Reservoir, down into the valley.”
When engineers were designing the Lexington retrofit years ago, they had to do it with not only floods in mind, but also droughts. So they added what they dubbed the “cross valley pipeline.”
Now they’re extending it to help recharge the groundwater going into Coyote Creek and surrounding percolation ponds.
Now, Valley Water hopes residents continue to do their part in this emergency.
“The forecasts are what they are asking customers to please conserve water,” said Varela.
When Anderson reopens, four other smaller dams will need their own retrofit as well.
In the end, Valley Water said every reservoir should then be able to handle 100% capacity levels.
The only thing they’ll need then is rain.
Source: NBC Bay Area
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