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San Diego County Water Authority: SDCWA_historic_ThreeMenInsideTunnel
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San Diego County Water Authority: SDCWA_historic_ThreeMenDiggingTunnel
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San Diego County Water Authority:
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San Diego County Water Authority: SDCWA_historic_MWD addingpipe photo by Al Monteverde
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San Diego County Water Authority: SDCWA_historic_LayingPipe