The dam across the Colorado River that created Lake Powell
in 1956 was built about half way along the most enclosed section of Glen Canyon
, though upstream the lake has risen above the northern rim, forming the wide expanses of Waweap Bay and Warm Creek Bay. Downstream, 15 miles of the canyon remain in its original state, viewable from the US 89 bridge and from the dam itself, the top of which is open to the public. The nearby town of Page provides a wide range of visitor facilities, while water-based recreation is centered on Wahweap, a few miles north.
Glen Canyon Dam - full description