P12-201-4348 NA Klamath Project, OR-CA. Pumping Plant EE - View looking north along west wall area at concrete placement for the foundation slab of Plant EE. Concrete was hauled to jobsite in 8 c.y. loads by 10 c.y. mixer trucks. Concrete was placed using two E-Con pumpers. Vibration by means of 2" air vibrators; March 1977; USBR photo by D. J. Kline