Glen Canyon Dam Construction (1/3): 1955, USA

Glen Canyon Dam is the 3rd highest dam in the US (after Oroville and Hoover Dams), 220m high, constructed between the years of 1956-1966 as an arch-gravity concrete dam type, located in a curve of the Colorado River in northern Arizona, United States. It forms Lake Powell, one of the largest man-made reservoirs in the U.S. 4th Nov 1955 (1.5m/px): Before construction 1st Oct 1958 (50cm/px): During construction 29th Mar 1966 (25cm/px): After - Filling **-Compare with actual images** Source: USGS/EROS-Archive Aerial Photography - Single Frames [Glen Canyon Dam in Wikipedia](https://en.wikipedia.org/wiki/Glen_Canyon_Dam)