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DWR_2668867
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Last modified
10/16/2015 12:25:45 PM
Creation date
10/6/2014 11:52:59 AM
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Publications and Reports
Title
STREAM FLOW DATA FOR COLORADO
Year
2008
Document Type - Publications and Reports
Streamflow Report
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43 <br />PLATTE RIVER BASIN <br /> <br />06724000 ST. VRAIN CREEK AT LYONS, CO <br /> <br />LOCATION.--Lat 40°13'05", long 105°15'34", in NW¼NW¼ sec. 20, T.3 N,, R.70 W., Boulder County, Hydrologic Unit <br />10190005, on left bank 75 ft southwest of U.S. Highway 36 (State Highways 7 and 66) at southeast edge of <br />Lyons, 400 ft upstream from St. Vrain Supply Canal, and 0.4 mi downstream from confluence of North and <br />South St. Vrain Creeks. <br /> <br />DRAINAGE AREA AND PERIOD OF RECORD.--212 mi². Aug. 1887 to Sep. 1891, June 1895 to current year. Monthly only <br />data for some periods. Water quality data available from Oct. 1977 to Feb. 1981. On March 23, 2003, <br />the gage was moved approximately 0.2 mi upstream. In the new location, the gage is above the Supply <br />Ditch diversion, whereas the old location was below this diversion. <br /> <br />GAGE.--Data Collection Platform (DCP), shaft encoder and a continuous chart recorder in a 6-ft by 6-ft wooden <br />shelter with 42-inch concrete stilling well upstream of a low head concrete diversion dam. The primary <br />reference is an electric tape gage with a supplemental outside chain gage. <br /> <br />REMARKS.--Primary record is hourly averages of 15-minute data taken from satellite monitoring with chart back <br />up. The record is complete and reliable, except for November 21-23, 2007; when the stilling well or <br />inlets were frozen; December 3, 2007 to March 10, 2008, when the station was closed for winter. The <br />record is good, except for periods of no gage height or ice affected record, which are estimated and <br />poor. Station maintained and record developed by Russell Stroud. <br /> <br />RATING TABLE.--SVCLYOCO25 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 17 24 18 14 12 16 16 61 298 443 152 79 <br /> 2 24 21 19 16 12 14 22 53 299 432 139 76 <br /> 3 23 19 20 17 10 12 23 52 338 416 142 73 <br /> 4 23 21 20 18 10 12 21 53 376 403 158 68 <br /> 5 23 20 20 18 9.0 12 23 53 441 404 141 71 <br /> 6 23 11 18 16 8.0 12 22 58 341 405 118 69 <br /> 7 22 12 16 15 8.0 13 25 68 285 397 177 63 <br /> 8 19 13 12 14 10 14 22 78 297 359 172 58 <br /> 9 19 11 10 14 15 15 23 82 267 316 145 55 <br /> 10 19 11 10 13 18 16 23 84 265 289 196 53 <br /> 11 19 15 10 13 20 17 20 78 278 342 188 53 <br /> 12 19 15 8.0 13 22 17 20 79 239 325 164 87 <br /> 13 19 16 8.0 13 24 16 23 91 227 309 134 87 <br /> 14 36 13 8.0 13 20 17 23 83 232 284 100 66 <br /> 15 39 8.1 8.0 13 18 17 23 85 252 258 102 58 <br /> 16 30 14 10 13 16 19 32 81 306 245 186 52 <br /> 17 28 15 12 11 14 18 34 81 315 243 235 50 <br /> 18 31 13 13 10 14 17 29 86 312 227 206 52 <br /> 19 21 12 14 10 15 17 34 110 340 185 175 58 <br /> 20 25 12 14 10 16 17 35 182 470 183 160 64 <br /> 21 19 10 14 8.0 17 18 40 258 516 177 137 67 <br /> 22 16 8.0 12 8.0 17 18 42 339 516 175 114 65 <br /> 23 20 8.0 11 10 18 18 45 282 473 183 107 56 <br /> 24 22 16 10 11 18 18 49 241 481 194 108 50 <br /> 25 21 18 10 14 16 19 51 239 510 186 107 46 <br /> 26 20 16 9.0 15 14 17 52 223 462 175 106 44 <br /> 27 20 16 8.0 14 14 17 50 202 433 164 94 42 <br /> 28 23 14 8.0 14 16 18 48 191 457 152 86 43 <br /> 29 20 10 10 12 16 20 47 217 450 147 82 43 <br /> 30 17 11 11 12 --- 22 49 224 457 140 84 42 <br /> 31 20 --- 12 10 --- 21 --- 275 --- 156 80 --- <br /> <br />TOTAL 697 423.1 383.0 402.0 437.0 514 966 4289 10933 8314 4295 1790 <br />MEAN 22.5 14.1 12.4 13.0 15.1 16.6 32.2 138 364 268 139 59.7 <br />AC-FT 1380 839 760 797 867 1020 1920 8510 21690 16490 8520 3550 <br />MAX 39 24 20 18 24 22 52 339 516 443 235 87 <br />MIN 16 8.0 8.0 8.0 8.0 12 16 52 227 140 80 42 <br /> <br />CAL YR 2007 TOTAL 36206.1 MEAN 99.2 MAX 483 MIN 8 AC-FT 71820 <br />WTR YR 2008 TOTAL 33443.1 MEAN 91.4 MAX 516 MIN 8 AC-FT 66330 <br /> <br />MAX DISCH: 564 CFS AT 06:30 ON Jun. 25, 2008 GH 2.71 FT. SHIFT -0.01 FT. <br />MAX GH: 2.71 FT. AT 06:30 ON Jun. 25, 2008 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br />
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