An earlier, much smaller dam had stood at Aswan since the turn of the twentieth century. The High Dam, built between 1960 and 1970 with Soviet engineering and finance, was on a different scale entirely.
The financing became a Cold War hinge. When the United States and the World Bank withdrew their funding offer in 1956, President Nasser nationalised the Suez Canal to pay for the dam — triggering the Suez Crisis — and the Soviet Union ultimately financed and engineered the project. The lotus-shaped Friendship Monument at the western end commemorates that partnership.
The numbers are worth having. The dam stands about 111 metres high and runs nearly four kilometres across the valley, and Lake Nasser behind it stretches roughly 500 kilometres southward into Sudan, where its far end is called Lake Nubia. It remains one of the largest reservoirs on earth.
It gave Egypt year-round irrigation, flood control and a large share of its electricity. It also stopped the annual deposit of silt that had fertilised the flood plain for millennia, so Egyptian farming now depends on manufactured fertiliser; it altered the Mediterranean coastline at the delta; and it displaced tens of thousands of Nubian people whose villages are now under Lake Nasser.
The rescue of the Nubian monuments — Abu Simbel, Philae and a dozen others — was the international response to the flooding, and it effectively created the modern practice of World Heritage.