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HEMET, Calif. (AP) - Portions of the 242-mile Colorado River Aqueduct will be shut down starting Friday to fight the spread of an invasive mussel that can clog the system that helps supply water to an estimated 18 million people.
Sections of the aqueduct are to be closed for 10 days to kill young quagga mussels, a thumbnail-sized Ukrainian invader.
Hundreds of quaggas were found in the aqueduct during a maintenance shutdown in March. Inspections last month found the mussels had spread about 100 miles west.
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