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Show 8 Utah Geological and Mineral Survey Water- Resources Bulletin 21, 1976 113° 00' 112° 30' 112° 00' 41° 30' - 41° 00' OGDEN • SALT LAKE CITY EXPLANATION Lines of equal average annual - 12 freshwater- lake evaporation, interval 1 inch ( 25 millimetres) Proposed dike Numbers show diking options ( see text) Base from U. S. Geological Survey state base map, scale 1: 500,000, 1959 - r- 10 10 i 20 Kilometres 20 Miles _ J Figure 5. Map showing average annual freshwater- lake evaporation for Great Salt Lake, 1931- 70. |