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Show •-#• » • l.( Tart 2 - The Great Salt Lake Diking Project * * - The Great Halt Lafca: The L-'. lce is a rennant of Lake 3ou: « oville, which was a body of fresh water formed by the nelting of the ice of the last glacial period and had its outlet to the North through the Ssafce Hirer. The Great Sal Lakf? has an area of 2d036 square miles ( l93Q5 » OQQ acr'is) at tie legally established meander line of 4,205 feet elevation. At e2evation 4,200 the area is about 1^ 370 square miles ( 18197 » 000 acres J* Tlui maximum elevation of the surface si ace 1851 was 4-. 211* 75 feet ia 1873 and the minimum 4,195.75 feet in 1906, the present ( 1933) beinc about 4197 ft. Praetically all of the water flowing into the Lake cones from the East I side, representing the drainage ef the Wasatch Mountains, the sources ^ orth and South being the Boar River, Weber River, Jordan River and Surplus Canal. The average annual discharge from these sources follows: Bear River( does not include Kalad Hiver) 1127 thousand acre ft « Weber River 403 • " " Jordan 271 " " Surplus Canal 95. " " " 1976 thousand acre ft. Annual unaccounted Inflow is estimated at about 1* 175 thousand acre ft and evaporation has been determined as being 3* 44 ft0 annually for the salt water ( fresh water equivalent being 4022 ft*) The average rain fall upon the surface of the lake is found to be 0* 73 ft, annually0 that East of the Promontory - Fremont Island - Antelpoe Island line being 1,00 fte and that rest of this line 0^ 65 ft » Analysis of Qreat Srlt Lake Water: At elevation 4,1* 8.5 ft. the brines contain 23o7& f> solids of the following analysis: " Sodium 31067r Carbonate .8o> Potassium lft53r Calcium s19^ Magnesium 2.46J& Chlorine .5,5 > 59? 9 |