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37 <br />PLATTE RIVER BASIN <br /> <br />MIDDLE ST. VRAIN CREEK NEAR PEACEFUL VALLEY, CO <br /> <br />LOCATION.--Lat 40 07’ 55”, long 105 31’ 00”, NE1/4 NW1/4 Sec. 24, T.2 N., R.73 W. <br /> <br />PERIOD OF RECORD AND DRAINAGE AREA.--Gage established on May 14, 1998 by State of Colorado, Division of Water <br />Resources personnel. The record at this gage is partial year record only. <br /> <br />GAGE.--Data Collection Platform (DCP), shaft encoder and a continuous chart recorder in 48-inch diameter metal <br />pipe shelter and well. The primary reference gage is a metal drop tape and adjustable reference point <br />(RP) located on the equipment shelf of the shelter. Gage is not equipped with a supplemental outside <br />staff gage. <br /> <br />REMARKS.--The primary record is hourly averages of 15-minute DCP data with chart as backup. The record is <br />complete and reliable, except for October 8, 18-19, 2007, when the gage was affected by ice; October 19, <br />2007 to May 19, 2008, when the gage was off for winter; and, May 28, 2008 to June 4, 2008 the gage was <br />experiencing drawdown conditions, presumably due to movement of rocks in the gage pool area. The record <br />is good, except for periods when the stage-discharge relationship was affected by ice, which is <br />estimated and fair; and period of drawdown effect, which is fair. The peak occurred while the gage was <br />experiencing drawdown conditions and is therefore rated fair. Record for Oct. 19, 2007 and May 19, 2008 <br />estimated based on partial day record and considered fair. Partial year record only. Station <br />maintained and record developed by Russell Stroud. <br />RATING TABLE.--MIDSTECO04 USED FROM 01-Oct-2007 TO 30-Sep-2008 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2007 TO SEPTEMBER 2008 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 12 --- --- --- --- --- --- --- 169 146 45 25 <br /> 2 17 --- --- --- --- --- --- --- 184 139 44 25 <br /> 3 14 --- --- --- --- --- --- --- 204 132 42 23 <br /> 4 13 --- --- --- --- --- --- --- 178 134 40 21 <br /> 5 12 --- --- --- --- --- --- --- 181 132 37 21 <br /> 6 12 --- --- --- --- --- --- --- 148 143 41 19 <br /> 7 12 --- --- --- --- --- --- --- 137 132 53 17 <br /> 8 10 --- --- --- --- --- --- --- 133 113 45 17 <br /> 9 11 --- --- --- --- --- --- --- 103 102 53 17 <br /> 10 11 --- --- --- --- --- --- --- 109 102 63 16 <br /> 11 10 --- --- --- --- --- --- --- 115 99 56 17 <br /> 12 9.9 --- --- --- --- --- --- --- 86 94 50 26 <br /> 13 10 --- --- --- --- --- --- --- 97 90 42 21 <br /> 14 12 --- --- --- --- --- --- --- 103 83 36 18 <br /> 15 11 --- --- --- --- --- --- --- 110 77 38 17 <br /> 16 11 --- --- --- --- --- --- --- 148 77 61 16 <br /> 17 10 --- --- --- --- --- --- --- 159 74 70 16 <br /> 18 10 --- --- --- --- --- --- --- 165 70 63 16 <br /> 19 10 --- --- --- --- --- --- 50 176 67 54 18 <br /> 20 --- --- --- --- --- --- --- 88 168 69 49 18 <br /> 21 --- --- --- --- --- --- --- 114 163 64 42 20 <br /> 22 --- --- --- --- --- --- --- 124 154 64 38 19 <br /> 23 --- --- --- --- --- --- --- 87 153 70 37 18 <br /> 24 --- --- --- --- --- --- --- 71 157 72 36 18 <br /> 25 --- --- --- --- --- --- --- 68 156 69 35 17 <br /> 26 --- --- --- --- --- --- --- 75 151 61 34 16 <br /> 27 --- --- --- --- --- --- --- 76 149 55 33 16 <br /> 28 --- --- --- --- --- --- --- 93 149 52 30 15 <br /> 29 --- --- --- --- --- --- --- 123 146 50 28 15 <br /> 30 --- --- --- --- --- --- --- 136 148 47 26 14 <br /> 31 --- --- --- --- --- --- --- 154 --- 46 25 --- <br /> <br />TOTAL 217.9 --- --- --- --- --- --- 1259 4399 2725 1346 552 <br />MEAN 11.5 --- --- --- --- --- --- 96.8 147 87.9 43.4 18.4 <br />AC-FT 432 --- --- --- --- --- --- 2500 8730 5410 2670 1090 <br />MAX 17 --- --- --- --- --- --- 154 204 146 70 26 <br />MIN 9.9 --- --- --- --- --- --- 50 86 46 25 14 <br /> <br />CAL YR 2007 TOTAL 9754.7 MEAN 54.2 MAX 156 MIN 9.8 AC-FT 19350 (PARTIAL YEAR RECORD) <br />WTR YR 2008 TOTAL 10498.9 MEAN 68.2 MAX 204 MIN 9.9 AC-FT 20820 (PARTIAL YEAR RECORD) <br /> <br />MAX DISCH: 277 CFS AT 22:00 ON Jun. 2, 2008 GH 2.96 FT. SHIFT 0.11 FT. <br />MAX GH: 2.96 FT. AT 22:00 ON Jun. 2, 2008 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br /> <br />