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6 <br /> <br />PLATTE RIVER BASIN <br /> <br />06706000 NORTH FORK SOUTH PLATTE RIVER BELOW GENEVA CREEK, AT GRANT, CO <br /> <br />LOCATION.--Lat 39°27'26", long 105°39'29" in NW¼ sec. 10, T.7 S., R.74 W., Park County, Hydrologic Unit <br />10190002, on left bank at Grant, 1,550 ft downstream from Geneva Creek, and 1.3 mi downstream from <br />east portal of Harold D. Roberts tunnel. <br /> <br />DRAINAGE AREA.--127 mi². <br /> <br />GAGE.--Water-stage recorder with satellite telemetry in a wooden shelter at a concrete control section. <br />Station is owned and maintained by the Denver Water Dept. Satellite telemetry is maintained by the <br />U.S. Army Corps of Engineers and the USGS. <br /> <br />REMARKS.--The primary record is taken from the hourly satellite data and is complete. The record is <br />reliable except for corrections used for Dec. 27, 1997-Jan. 6, 1998, when the encoder was operating <br />in reverse, and when the stage-discharge relationship was affected by ice accumulating on the <br />control on Oct. 26-29; Nov. 1-4, 10-17; Dec. 4-8, 11-17, 1997; Mar. 18-21, 30-31; Apr. 1-3, 7-9, 17- <br />19, 1998. Daily mean gage heights agreed to within 0.02 ft with the chart data. Record is good <br />except for winter period of ice affect, which is poor. Record developed by Robert Cooper. <br /> <br />RATING TABLE.--PLAGRACO11 USED FROM 01-OCT-1997 TO 30-SEP-1998 <br /> <br />DISCHARGE, IN CFS, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 197 40 27 23 21 20 22 49 231 720 167 94 <br /> 2 260 42 27 23 20 20 22 51 245 656 152 81 <br /> 3 262 42 27 23 20 20 22 58 249 548 132 69 <br /> 4 260 41 27 23 20 20 23 62 233 488 139 65 <br /> 5 258 42 28 22 20 19 23 63 207 478 140 63 <br /> 6 256 39 28 22 20 19 22 64 185 469 121 62 <br /> 7 261 39 28 21 21 19 21 62 172 507 110 61 <br /> 8 264 38 28 21 21 19 21 62 168 593 102 61 <br /> 9 235 40 28 21 20 19 22 66 162 643 124 60 <br /> 10 203 42 29 22 20 18 25 71 159 587 188 58 <br /> 11 202 42 29 21 20 18 27 75 155 390 170 57 <br /> 12 187 42 28 21 20 18 28 77 232 278 120 64 <br /> 13 167 40 27 21 20 18 26 84 314 363 112 72 <br /> 14 159 38 26 21 20 18 26 96 306 561 110 62 <br /> 15 74 36 25 21 20 19 27 88 258 646 106 59 <br /> 16 42 34 24 21 20 19 26 89 178 622 100 61 <br /> 17 43 32 23 21 21 19 22 98 138 633 100 63 <br /> 18 42 32 23 21 21 19 21 112 139 625 105 58 <br /> 19 41 34 27 21 21 21 25 127 142 621 94 56 <br /> 20 41 37 29 21 21 20 25 152 148 530 97 55 <br /> 21 40 32 29 20 20 20 26 167 155 512 99 55 <br /> 22 40 30 29 20 20 20 30 159 163 541 99 55 <br /> 23 40 28 28 20 20 27 36 144 205 505 87 55 <br /> 24 38 29 28 21 20 30 42 147 304 353 84 54 <br /> 25 30 29 28 21 20 28 42 140 383 207 87 51 <br /> 26 36 28 28 21 20 28 40 162 474 196 84 49 <br /> 27 40 28 26 20 21 33 36 189 520 145 78 48 <br /> 28 43 28 26 20 20 25 39 218 489 145 74 48 <br /> 29 42 28 26 20 --- 23 40 226 556 154 71 50 <br /> 30 41 27 26 20 --- 19 44 229 649 147 67 52 <br /> 31 40 --- 24 21 --- 20 --- 223 --- 150 66 --- <br /> <br /> TOTAL 3884 1059 836 655 568 655 851 3610 7919 14013 3385 1798 <br /> MEAN 125 35.3 27.0 21.1 20.3 21.1 28.4 116 264 452 109 59.9 <br /> AC-FT 7700 2100 1660 1300 1130 1300 1690 7160 15710 27790 6710 3570 <br /> MAX 264 42 29 23 21 33 44 229 649 720 188 94 <br /> MIN 30 27 23 20 20 18 21 49 138 145 66 48 <br /> <br /> CAL YR 1997 TOTAL 58196 MEAN 159 MAX 660 MIN 18 AC-FT 115400 <br /> WTR YR 1998 TOTAL 39233 MEAN 107 MAX 720 MIN 18 AC-FT 77820 <br /> <br /> MAX DISCH 740 CFS AT 0100 01-JUL-1998 GH 1.99 FT. SHIFT 0.05 FT. MAX GH 1.99 FT. AT 0100 01-JUL-1998 <br /> <br /> FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br />0 <br />200 <br />400 <br />600 <br />800 <br />OctNovDecJanFebMarAprMayJunJulAugSep