Settling basin at the head of Hemenway Wash for water purification works in Boulder City.
Transcribed Notes: Notes on photo sleeve: Water tank gravel plant at head of Hemenway Wash. (Nov. 8, 1931) Clarified water from river was then pumped up to Boulder City. (Credit: W.A. Davis) (According to W.A. Davis, this settling basin was for water purification.)
From the Eileen Margaret Green Photograph Collection (PH-00229) -- Handwritten on envelope, "Side Canyon, Arrowhead Canyon. (from her MA thesis. A Cultural Ecological Approach to the Rock Art of Southern Nevada, GN 799 P4 G73x 1987a)". Handwritten on the back of the photograph, "Figure 6. Side Canyon, Arrow Canyon."
At top of map: 'Compliments of the Forward Mining Development Co.' On left and right margins: 'The Patrick Investment Company, Fiscal Agents.' At bottom of map: '19 Toltec Block, Denver, Colorado.' 'The Williamson-Haffner Co., Denver.' Relief shown by hachures. Properties owned by Patrick Investment Company are marked in red. Shows railroads, roads, and pipelines. Scale [ca. 1:39,000. 1 in. to approx. 3,250 feet].