Groundwater Pumping Undermining Surface Canal?

The irony here is just too rich:

Fearing the main canal carrying drinking water to millions of Southern Californians is sinking again, water officials are monitoring the effects of incessant agricultural pumping from the aquifer that runs under the aqueduct.

Their concern is that the canal, which has sunk six feet in places during California dry spells, will buckle enough to slow delivery of water to parched points south and force costly repairs.


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