P12-201-4389 NA Klamath Project, OR-CA. Center Canal Flume--View showing original flume pier excavation. Notice area of light coloring behind perforated culvert. This is sand washed out from pile driving operations on added pier. Mr. Stein and I became concerned because it appeared we were doing more damage than good to surrounding soil, trying to reach 35' penetration on piling, as required by the Region. This sand boiled up from bottom of excavation some 15 feet west of pile driving; June 15, 1977; USBR photo by D. J. Kline