22 February 2017
Two dam glory holes
Glory hole spillways often are a feature of concrete arch dams that block narrow canyons. Hungry Horse Dam, built by the Bureau of Reclamation in the early 1950s, has a glory hole, as does another, smaller, BuRec dam, the Monticello Dam in California.
Water behind Monticello is flooding down that dam’s glory hole, as can be seen in this photograph at the Weather Underground. Below that image is my early 1980s photograph of the glory hole at Hungry Horse. The Twistedsifter website has an excellent collection of photographs of dam glory holes.