MCWD says Casa Diablo Plans could hurt Mammoth water supply

Mammoth Creek provides  a major part of the community's water supply.

Mammoth Creek provides a major part of the community’s water supply.

Mammoth Community Water District officials say that the proposed Casa Diablo Geothermal plant expansion could harm both groundwater and surface water resources used to serve the community of Mammoth Lakes.

Casa Diablo Geothermal officials have gone through the environmental investigation of their expansion plans and Mammoth’s Water District has responded. In a press release, the Water District says the geothermal expansion project proposes the development of 16 production and reinjection wells along with a “significant increase in geothermal fluid pumping.” The release also says that several of the proposed new wells are within two miles of the District’s groundwater production wells.

Mammoth Water officials hired two specialists to help in the review of Casa Diablo’s plans. District officials say that pumping or well reinjection could decrease aquifer recharge or alter water quality in the aquifers. There are also concerns about increased pumping by Casa Diablo decreasing flows in Mammoth Creek.

The supply of water to Mammoth comes from both surface water, recycled water and groundwater. According to Mammoth officials, the Draft Environmental Document on Casa Diablo’s proposed geothermal expansion project says there are no significant impacts to the Water District’s operations. According to the District press release, the Casa Diablo document “does not provide sufficient information to support these conclusions.” The Water District’s specialists identified “significant information gaps.”

More information is available on the Mammoth Community Water District website at www.mcwd.dst.ca.us.

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Mark
Mark
8 years ago

“significant increase in geothermal fluid pumping.”

What is the fluid exactly? Is it just water?

Mark
Mark
8 years ago

Desert Tortoise – The Coso Geothermal plant ran a pipe to the Rose Valley and dug a well I’m pretty sure you are incorrect and they are infact pumping water from the Rose Valley aquifer. Inyo County BOS sacrificed the Rose Valley aquifier for the tax revenue generated by the… Read more »

Benett Kessler
Benett Kessler
8 years ago
Reply to  Mark

Not sure. LADWP contributes a big tax payment. Coso does too, but they are in a perpetual appeal on the amount.
BK

Mark
Mark
8 years ago
Reply to  Benett Kessler

Here it is Benett, at the time you wrote the story they were 2nd to LADWP

http://sierrawave.net/4004/inyo-county-and-coso-geothermal-tussle-over-assessed-valuation/

Desert Tortoise
Desert Tortoise
8 years ago
Reply to  Mark

IWVWD claims they sell the plant water from a farm they own in the Owens Valley at a rate that they claim is not going to deplete the aquifer they draw from. At least that is what I read in the press down there. As for IWV aquifer getting any… Read more »

Drill Baby Drill
Drill Baby Drill
8 years ago

Fracking comes to Mammoth.

Jeremiah's stance
Jeremiah's stance
8 years ago

Miss me with your misinformed conservative stance Drill Baby Drill! The plant out in Coso has implemented the cheapest way to conserve the power plant. Of course by pumping more Owens Valley water to suit there needs. Too bad the pumping influence is not gonna be able to hold up,… Read more »

Drill Baby Drill
Drill Baby Drill
8 years ago

Jeremiah, it was satire. Fracking pollutes ground water and pumping geothermal fluid down in the ground just two miles from Mammoth’s ground water supply does not seem like a good idea to me without a lot more scientific study. “In a press release, the Water District says the geothermal expansion… Read more »

Jeremiah's stance
Jeremiah's stance
8 years ago

I see, It’s hard to read satire and/or sarcasm in text. It’s something I don’t take lightly and the fact we all can go home to our comfy beds and our comfort zones with the ability to forget about all that is wrong with the world the urgency fades away.… Read more »

Desert Tortoise
Desert Tortoise
8 years ago

The Coso Geothermal field depleted the aquifer in the Coso Basin. To keep the plant running they had to find a new source of water. The initial proposal to tap the aquifer in Rose Valley was nixed by the Inyo County BOS because it was feard Little Lakes would dry… Read more »