Settling basin at the head of Hemenway Wash for water purification works in Boulder City.
Transcribed Notes: Stamped on back of photo: Photograph by W. A. Davis Box 1169, Las Vegas, Nevada; Notes on photo sleeve: [Setting basin for making concrete. Upstream from the Dam about 5-10 miles. R.R. track may have crossed over to Arizona.] Photographer W.A. Davis disagrees: says this is part of a water purification plant; the settling basin shown purifies water. (documentation, 4/92)