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<br /> PLATTE RIVER BASIN
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<br /> 06727000 BOULDER CREEK NEAR ORODELL, CO
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<br />LOCATION.--Lat 40°00'23", long 105°19'49", in NE¼SW¼ sec.34, T.l N., R.71 W., Boulder County, Hydrologic Unit 10190005, on
<br />left bank along State Highway 119, 0.7 mi southwest of old Orodell, 1.1 mi upstream from Fourmile Creek, and 2.9
<br />mi southwest of courthouse in Boulder.
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<br />DRAINAGE AREA.--102 mi2.
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<br />GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 5,826 ft above National Geodetic Vertical
<br />Datum of 1929, from topographic map. Prior to Sept. 1,1907, non-recording gage, and Sept. 1. 1907, to May 11,
<br />1917, water-stage recorder, at sites 1.1 mi downstream, just upstream from Fourmile Creek, at different datums.
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<br />REMARKS.-- Flow regulated by Barker Reservoir, capacity, 11,500 acre-Ft. Low flow during non-irrigation season regulated
<br />by Orodell power-plant 1,500 ft upstream from station. Record is complete and reliable except for the following
<br />periods: Nov. 23-30; Dec. 1-3, 1991 when the recorder cable came out of pulley wheel causing float to be above
<br />water surface in well; May 11, 13, 16-17, 22, 1992 when pen was not inking or skipping and DCP had low values.
<br />The stage-discharge relation was affected by thin ice layer during part of day on Nov. 2-3, 20; Dec. 4-7, 9-12,
<br />15-19, 21-23, 26, 30-31, 1991; Jan. 1-3, 9-11, 13-31; Feb. 1-10, 15-17, 20, 24, 26, 29; Mar. 10-11, 1992. Chart
<br />record was used on Oct. 4-8, 10-11, 16-17, 24, 28-29, 1991; Jan. 4-5; May 4-5, 18-21; Jun. 4; Jul. 7, 10, 16, 21;
<br />Sep. 15-16, 18-20, 27, 29-30, 1992. Record is good, except for periods of no gage-height record and ice affect,
<br />which is fair. Station maintained and records developed by Fred Renner.
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<br />RATING TABLE.--BOCOROCO13 USED FROM 01-OCT-1991 TO 30-SEP-1992
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<br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 1991 TO SEPTEMBER 1992
<br /> MEAN VALUES
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<br />DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
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<br /> 1 18 41 27 12 11 12 33 58 123 132 60 58
<br /> 2 19 24 23 14 3.8 4.8 31 54 108 134 74 63
<br /> 3 18 24 25 3.8 25 23 38 42 96 125 78 51
<br /> 4 17 48 24 8.8 16 24 25 48 104 119 78 48
<br /> 5 17 51 17 25 16 18 27 64 132 108 69 53
<br /> 6 16 45 21 14 20 18 62 119 134 99 71 42
<br /> 7 16 45 16 10 19 18 35 159 130 93 68 46
<br /> 8 17 47 15 17 17 24 51 162 133 111 55 46
<br /> 9 17 49 11 13 18 20 34 141 150 132 50 41
<br /> 10 17 48 17 15 16 32 61 139 158 128 42 32
<br /> 11 17 48 14 15 18 22 46 114 146 111 72 33
<br /> 12 16 44 11 17 18 18 68 81 132 105 73 27
<br /> 13 16 48 19 17 21 18 49 65 126 122 77 30
<br /> 14 16 40 20 13 21 20 76 101 127 116 74 27
<br /> 15 16 8.7 17 18 21 20 59 138 120 100 65 26
<br /> 16 16 10 15 14 16 21 89 143 108 116 55 28
<br /> 17 14 11 15 13 20 22 80 146 115 107 63 27
<br /> 18 15 44 15 3.0 21 23 94 151 124 100 77 30
<br /> 19 15 45 11 25 16 23 85 167 130 108 72 29
<br /> 20 15 48 12 12 13 21 73 183 101 123 55 26
<br /> 21 15 50 13 14 12 21 66 216 113 116 49 26
<br /> 22 15 44 11 15 14 12 55 253 145 103 69 26
<br /> 23 15 42 13 16 13 29 51 216 131 103 78 23
<br /> 24 16 40 11 10 14 21 50 199 131 108 116 23
<br /> 25 16 30 8.7 11 12 20 49 194 151 118 107 25
<br /> 26 16 39 13 5.2 3.9 22 46 180 193 126 88 27
<br /> 27 15 28 14 15 20 23 44 184 176 121 82 26
<br /> 28 17 22 14 17 21 32 46 161 164 98 63 23
<br /> 29 20 21 11 14 13 24 52 139 157 80 53 22
<br /> 30 39 32 13 14 --- 39 62 128 141 75 51 25
<br /> 31 27 --- 13 13 --- 36 --- 130 --- 66 59 ---
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<br />TOTAL 539 1116.7 479.7 423.8 469.7 680.8 1637 4275 3999 3403 2143 1009
<br />MEAN 17.4 37.2 15.5 13.7 16.2 22.0 54.6 138 133 110 69.1 33.6
<br />AC-FT 1070 2210 951 841 932 1350 3250 8480 7930 6750 4250 2000
<br />MAX 39 51 27 25 25 39 94 253 193 134 116 63
<br />MIN 14 8.7 8.7 3.0 3.8 4.8 25 42 96 66 42 22
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<br />CAL YR 1991 TOTAL 24233.7 MEAN 66.4 MAX 409 MIN 8.7 AC-FT 48070
<br />WTR YR 1992 TOTAL 20175.7 MEAN 55.1 MAX 253 MIN 3.0 AC-FT 40020
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<br />MAX DISCH 266 CFS AT 2300 21-MAY-1992 GH 2.98 FT. SHIFT 0.00 FT. MAX GH 2.98 FT. AT 2300
<br />21-MAY-1992
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