Randy Pench/rpench@sacbee.com

Nik Barbieri, director of technical services with the Great Basin Unified Air Pollution Control District, surveys a portion of dried-up Owens Lake. Since 2001, the Los Angeles Department of Water and Power has spent $1.2 billion to control dust across 42 square miles of the lake. <137>DWP spreads more than 30 billion gallons of water a year across the lake floor. on Thursday, November 21, 2013 <137>

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