I could feel my own outrage building, as if by reflex. Say the words “the Glen Canyon Dam” and the environmental ... Meanwhile whole cities and mini-societies have grown up around their ...

Federal officials opened the floodgates at Glen ... the Grand Canyon. The five-day flood is meant to mimic conditions of the river before the dam was built, because the dam now blocks a majority ...

Natural pozzolans have served as a building material in Arizona for ... most notably the construction of the Glen Canyon Dam and Powerplant. Pozzolan was trucked 110 miles to the dam site, where ...