Transition Section from square to round in the "cut-and-cover" portion of the Feeder Canal across the slide area. Each of the two barrels has a capacity of 3,600,000 gallons a minute, and the discharge from both barrels would provide a domestic supply for 100,000,000 people 2/3 of the nation's population. In other words, these two barrels running full could supply domestic water to all the people of the United States living in cities and towns of populations over 1,000.

- November 8, 1949 photo