Notes: | Relief shown by hachures and spot heights. Canals constructed by the United States, boundary of Pioneer Irrigation District, and benchmarks shown in red. Canals not constructed by the United States, boundary of Nampa Meridian Irrigation District shown in blue. Rivers, reservoirs and certain highlands shown in green. Inset: [Arrowrock Reservoir]. Includes text: "Information of Interest." Public land (township, range, and section) grid. "This sheet is a convenient sized reduction of map no. 18400-A. Which is double this scale and shows details more clearly. Also views of Boise and Arrowrock Dams."
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