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<br />. <br /> <br />... <br /> <br />.' <br /> <br />Colorado River Compact Symposium <br />James S. Lochhead <br />Page 21 <br /> <br />Comparison of Consumptive Uses, Losses, and Water Supply <br />1922 vs. Present <br />Colorado River Mainstem <br />(Values in Million Acre-Feet per <br /> <br />1922 <br /> <br />Year) <br />Present <br />15.0 2 <br />13.5 3 <br />9.7 3 <br />11. 8 2 <br />1.4 4 <br />11.1-16.4 <br />3.7 6 <br />0.5 6 <br />4.2 <br />7.5 8 <br />1.8 9 <br />9.3 <br />1.6 <br />15.1 <br /> <br />Reconstructed average virgin flow <br />at Lee's Ferry <br /> <br />18,4 1 <br /> <br />Long term reconstructed average <br /> <br />Lowest reconstructed ten-year <br />period <br /> <br />Lowest ten-year period of record <br /> <br />Lower Basin tributary inflow <br /> <br />2.1 1 <br /> <br />Total available water supply <br />(Mainstem) <br /> <br />20.5 1 <br /> <br />Upper Basin Uses <br /> <br />2.5 5 <br /> <br />Upper Basin Reservoir EVaporation <br /> <br />Total upper Basin Uses <br /> <br />2.5 <br /> <br />Lower Basin Mainstem Uses <br /> <br />2.6 7 <br /> <br />Lower Basin Reservoir EVaporation <br /> <br />Total Lower Basin Mainstem Uses <br /> <br />2.6 <br /> <br />Delivery to Mexico and Welton- <br />Mohawk bypass <br /> <br />Total Mainstem Uses <br /> <br />6.1 <br /> <br />Notes <br />1. For the period 1903-1922. This was the amount reported <br />by Delph E. Carpenter in his Historical Memorandum In Re <br />Colorado River, and Brief of Law of Interstate Compacts, <br />June 4, 1921 at hearing on H.R. 6821, Judiciary <br />Committee, Colorado House of Representatives. In his <br />Comments to Congress on the Colorado River Compact, <br />Commissioner of Reclamation Arthur Powell Davis estimated <br />the reconstructed flow at 18.1 maf/yr. Conq. Rec., <br /> <br />January 30, 1923, pp. 2713-2717. <br />2. Long term average for the period <br />ten-year averages for the periods <br /> <br />1906-1996. Critical <br />1931-1940 and 1954- <br />