Laserfiche WebLink
22 <br /> <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 <br />Unit 10190005, on left bank 75 ft southwest of U.S. Highway 36 (State Highways 7 and 66) at <br />southeast edge of Lyons, 400 ft upstream from St. Vrain Supply Canal, and 0.4 mi downstream from <br />confluence of North and 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 <br />only data for some periods. Water quality data available from Oct. 1977 to Feb. 1981. <br /> <br />GAGE.--Water-stage recorder with satellite telemetry in timber shelter. The DCP is the primary record with <br />chart recorder as backup. Supplemental outside staff gage. <br /> <br />REMARKS.--Record is complete and reliable. Graphic chart record was used on Jun 10-11; Sep. 9-10, 1998 and <br />to fill in hours missed on some days. Record is good. Station maintained and record developed by <br />Fred Renner. <br /> <br />RATING TABLE.--SVCLYOCO22 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 74 40 32 21 20 21 70 330 531 474 304 94 <br /> 2 70 38 31 21 19 20 74 313 568 484 279 94 <br /> 3 64 35 29 22 19 20 83 309 605 484 250 82 <br /> 4 63 37 30 22 20 19 110 336 637 447 267 75 <br /> 5 53 35 25 22 20 19 121 349 533 418 407 70 <br /> 6 49 33 30 20 20 19 117 335 410 416 330 66 <br /> 7 48 32 33 18 21 21 106 313 350 410 269 66 <br /> 8 52 35 30 22 21 20 106 296 294 347 239 66 <br /> 9 43 37 28 18 20 19 98 276 289 329 240 71 <br /> 10 45 31 28 17 19 19 91 278 305 348 256 68 <br /> 11 45 33 25 22 17 18 91 287 318 455 307 62 <br /> 12 48 30 24 20 18 21 99 284 323 381 278 62 <br /> 13 45 34 29 19 21 20 102 274 382 282 245 71 <br /> 14 47 28 29 20 20 20 110 290 376 219 225 80 <br /> 15 47 23 30 20 21 20 118 292 352 245 226 77 <br /> 16 46 29 28 20 22 19 132 265 306 241 202 71 <br /> 17 43 34 25 21 20 22 137 276 329 224 186 64 <br /> 18 40 33 25 21 19 34 166 319 325 209 175 57 <br /> 19 40 32 23 21 20 30 163 338 287 206 172 54 <br /> 20 41 32 22 18 19 36 172 379 345 195 158 52 <br /> 21 44 30 23 20 20 42 176 430 415 194 144 51 <br /> 22 43 30 26 18 19 52 186 526 455 215 141 48 <br /> 23 41 30 22 19 20 76 218 483 484 243 129 44 <br /> 24 46 30 20 20 19 99 305 412 443 233 119 38 <br /> 25 44 29 20 19 17 117 369 376 380 314 118 31 <br /> 26 43 30 22 20 16 108 400 376 414 371 114 28 <br /> 27 55 32 21 19 17 99 350 397 440 344 109 24 <br /> 28 55 33 20 20 19 91 347 445 474 328 109 25 <br /> 29 49 31 24 19 --- 84 340 488 484 325 99 23 <br /> 30 47 31 21 19 --- 77 349 457 473 337 92 24 <br /> 31 51 --- 20 20 --- 72 --- 445 --- 339 88 --- <br /> <br /> TOTAL 1521 967 795 618 543 1354 5306 10974 12327 10057 6277 1738 <br /> MEAN 49.1 32.2 25.6 19.9 19.4 43.7 177 354 411 324 202 57.9 <br /> AC-FT 3020 1920 1580 1230 1080 2690 10520 21770 24450 19950 12450 3450 <br /> MAX 74 40 33 22 22 117 400 526 637 484 407 94 <br /> MIN 40 23 20 17 16 18 70 265 287 194 88 23 <br /> <br /> CAL YR 1997 TOTAL 70305 MEAN 193 MAX 1550 MIN 17 AC-FT 139400 <br /> WTR YR 1998 TOTAL 52477 MEAN 144 MAX 637 MIN 16 AC-FT 104100 <br /> <br /> MAX DISCH 662 CFS AT 0445 04-JUN-1998 GH 4.81 FT. SHIFT -0.02 FT. MAX GH 4.81 FT. AT 0445 04-JUN-1998 <br /> <br /> FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br />0 <br />100 <br />200 <br />300 <br />400 <br />500 <br />600 <br />700 <br />OctNovDecJanFebMarAprMayJunJulAugSep