Whittier Narrows (dam), 1953
Dave Morgan, Chief of Gov. Surveying Party in San Gabriel River bed. 24: 'Elevating grader' loads 17 cu. yds in 30 seconds to truck. J-13, 14-9: Spillway structure. J-10: Looking across spillway structure toward 3-mile-long earth fill dam. 7: Looking across 3-mile-long earth fill dam".