National Geographic : 1925 Feb
©Elmendorf CONTROLLING THE LIFE Or EGYPT AT ASWAN These gigantic jets of water are spurting through sluices 62 feet wide and 28 feet high, in the Aswan Dam. Before theconstruction ofthis dam the Nile was a curse as well as a blessing. The terrific floods brought fertile mud, but by March thevalley parched forlack ofwater. Aswan, with its mile and a quarter of masonry, 131 feet above the foundations, is one of the world's longest dams. Between July and November wide-open sluices let the muddy water through, but during the winter a reservoir 185 miles long husbands supplies for thedrymonths.