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<br /> <br /> <br /> 18 <br /> <br /> PLATTE RIVER BASIN <br /> <br /> 06725500 MIDDLE BOULDER CREEK AT NEDERLAND, CO <br /> <br />LOCATION.--Lat 39°57'42", long 105°30'14", in NE¼SE¼ sec.13, T.l S., R.73 W., Boulder County, Hydrologic Unit 10190005, on <br />left bank at Nederland just downstream from North Beaver Creek and 1,000 ft upstream from Barker Reservoir. <br /> <br />DRAINAGE AREA.--36.2 mi2. <br /> <br />GAGE.--Water-stage recorder and compound sharp-crested weir, Datum of gage is 8,186.0 ft, Public Service Co. datum. Prior <br />to Mar. 18, 1909, at datum 4.0 ft, lower. Mar. 18, 1909, to Apr. 23, 1952, at datum 2.5 ft, lower than present <br />datum. Levels were run to inside gage on July 24, 1991 using RM Mo.1 as base. Gage was found to be reading 0.01 <br />ft low. No correction was made as the reading was within the allowable limit of +-0.02 ft. <br /> <br />REMARKS.--Record is complete and reliable. Stage-discharge relation affected by ice Nov. 29, 1990; Dec. 2-4, 7, 15-18, <br />20-27, 29-31, 1990; Jan. 20-23, 26-30, 1991; Feb. 25, 1991; Mar. 8, 18, 21, 1991. Records rated as fair during <br />ice affected conditions. Station maintained by Public Service Co. of Co. and records developed by Fred Renner. <br /> <br />RATING TABLE.--BOCMIDCO07 USED FROM 01-OCT-1990 TO 30-SEP-1991 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 1990 TO SEPTEMBER 1991 <br /> MEAN VALUES <br /> <br />DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 22 13 7.7 5.3 4.5 4.7 6.3 14 336 147 46 26 <br /> 2 21 13 7.1 5.1 4.5 4.7 7.3 17 359 135 46 26 <br /> 3 26 8.9 6.7 4.9 4.5 4.7 7.7 17 256 132 57 26 <br /> 4 21 12 6.7 5.3 4.7 4.9 8.3 17 227 122 77 25 <br /> 5 17 13 7.1 5.3 4.5 5.1 11 18 246 114 56 24 <br /> 6 17 12 7.5 5.7 4.5 5.1 13 17 284 116 62 23 <br /> 7 18 11 7.5 5.9 4.5 4.9 14 20 307 110 85 28 <br /> 8 20 12 7.3 5.7 4.5 5.1 13 28 274 108 61 32 <br /> 9 20 12 7.3 5.5 4.5 5.3 14 40 276 130 57 47 <br /> 10 22 12 7.3 5.5 4.3 5.1 10 57 264 112 54 48 <br /> 11 24 12 7.5 5.3 4.5 5.1 9.5 86 264 104 56 46 <br /> 12 18 12 7.5 5.5 4.5 5.1 8.9 101 299 93 52 50 <br /> 13 17 12 7.7 5.7 4.7 4.9 10 93 320 93 51 51 <br /> 14 17 11 7.3 5.5 4.9 4.5 9.1 97 319 85 45 44 <br /> 15 17 11 7.3 5.1 5.1 4.5 11 95 338 77 42 42 <br /> 16 17 11 7.3 5.1 4.9 4.9 11 83 302 76 45 38 <br /> 17 14 10 7.1 5.5 4.9 4.5 14 73 272 77 41 36 <br /> 18 17 10 7.3 5.3 4.9 4.7 14 86 254 77 39 31 <br /> 19 22 10 7.3 5.3 4.9 4.9 13 132 229 77 42 26 <br /> 20 21 10 6.9 5.3 5.1 4.9 14 156 218 82 39 25 <br /> 21 17 7.1 6.7 5.3 4.7 4.7 17 165 225 80 38 24 <br /> 22 19 6.1 6.3 5.3 4.7 4.5 17 190 232 82 35 22 <br /> 23 22 8.7 5.5 5.3 4.8 4.7 17 171 217 93 34 20 <br /> 24 20 8.9 4.9 5.3 4.7 4.9 17 128 206 86 32 19 <br /> 25 19 8.7 4.9 5.3 4.7 5.3 20 147 187 85 31 18 <br /> 26 18 9.3 4.5 5.1 4.7 5.1 22 204 169 82 31 18 <br /> 27 18 8.7 4.9 4.9 4.5 5.1 16 204 156 72 31 17 <br /> 28 17 7.3 5.3 4.9 4.3 5.1 15 199 169 61 29 17 <br /> 29 16 7.7 5.1 4.7 --- 4.9 14 190 163 54 29 16 <br /> 30 14 8.1 5.1 4.5 --- 5.7 14 185 162 50 28 16 <br /> 31 14 --- 5.1 4.5 --- 6.1 --- 187 --- 47 29 --- <br /> <br />TOTAL 582 308.5 203.7 162.9 130.5 153.7 388.1 3217 7530 2859 1400 881 <br />MEAN 18.8 10.3 6.57 5.25 4.66 4.96 12.9 104 251 92.2 45.2 29.4 <br />AC-FT 1150 612 404 323 259 305 770 6380 14940 5670 2780 1750 <br />MAX 26 13 7.7 5.9 5.1 6.1 22 204 359 147 85 51 <br />MIN 14 6.1 4.5 4.5 4.3 4.5 6.3 14 156 47 28 16 <br /> <br />CAL YR 1990 TOTAL 19565.3 MEAN 53.60 MAX 404 MIN 3.4 AC-FT 38810 <br />WTR YR 1991 TOTAL 17816.4 MEAN 48.8 MAX 359 MIN 4.3 AC-FT 35340 <br /> <br />MAX DISCH 540 CFS AT 2130 01-JUN-1991 GH 3.41 FT. SHIFT 0.03 FT. MAX GH 3.41 FT. AT 2130 <br />01-JUN-1991