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<br />Simulated historical streamflow at this control point also showed the poten- <br />tial effects of proposed withdrawals for the Vidler transmountain diversion at the <br />100-percent water-use allocation level cited in table 7 and the four options cited <br />in tables 8 through 11. Reduced streamflow would occur more frequently as the <br />water-use allocation percentages increase. Zero-flow condition~ were found to oc- <br />cur most frequently for reservoir-development option 4 for all levels of water-use <br />allocation. Even the simulated historical conditions with JOO percent of the <br />transmountain diversions indicated zero flow commonly occurring only during July. <br /> <br />Model-simulated historical monthly streamflows for control point 38 (Elk Riv- <br />er near Trull, Colo.) are presented in tables ]2 through ]6. Simulated monthly <br />streamflows for historical conditions without proposed transmountain diversions <br />vary from +1 to -25 percent and have an average absolute variation of]1 percent <br />of the monthly streamflows calculated from streamflow-gaging-station records. <br /> <br />Table 12.--Summary of monthly streamflows, <br />control point 38 (Elk River near Trull, Colo.), <br />for simulated historical conditions, including 100 percent <br />of transmountain diversions, and for historical conditions <br /> <br />[FLOW VALUES: A=MEAN; B=MEDIAN; and C=80-PERCENT EXCEEDENCE. Underscored <br />values are less than historical conditions without transmountain diversions] <br />FLOW MONTHLY FLOWS, IN CUBIC FEET PER SECOND <br />VALUES OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT <br /> SIMULATED HISTORICAL CONDITIONS <br />A 84 76 79 76 90 146 580 1911 2082 498 85 57 <br />B 83 79 80 75 89 ]43 561 ]873 2129 443 82 54 <br />C 46 47 62 56 79 118 420 1476 1646 137 55 29 <br />SIMULATED HISTORICAL CONDITIONS WITH 100 PERCENT OF TRANSMOUNTAIN DIVERSIONS <br />A 84 76 79 76 90 146 580 1911 2082 498 85 57 <br />B 83 79 80 75 89 143 561 1873 2129 443 82 54 <br />C 46 47 62 56 79 118 420 1476 1646 137 55 29 <br /> HISTORICAL STREAMFLOWS CALCULATED FROM GAG I NG-STAT ION RECORDS <br /> , <br />A 109 91 85 79 89 156 633 1995 2149 552 113 74 <br />B 110 91 86 78 86 146 580 1955 2170 482 100 74 <br />C 57 60 69 55 76 116 434 1488 1574 206 62 37 <br /> <br />25 <br />