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P12-201-4479 NA Klamath Project, OR-CA. Contractor had to pre-excavate sites where PP 'E' bridge piling would be driven. During construction of PP 'E', a pit run material was used for backfill. Apparently from previous encounters during construction, this material was placed completely around PP 'E'; November 15, 1977; USBR photo by D.J. Kline

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