Challenge at Glen Canyon (1983)

This film documents the rush to repair damage to the tunnel spillways of the Glen Canyon Dam that were damaged when they had to be used for the first time in 1983 due to record-breaking runoff into the Colorado river. As repairs were taking place, waters again began to rise in Lake Powell in 1984, creating a race against nature to finish repairs in time.

I saw this film decades ago at the Glen Canyon Dam visitors center, and it always stuck with me. The film includes references to the classic 1937 documentary The River about floods on the Mississippi.