LOCATION.-- Lat 40°19'49", long 90°53'46" (NAD of 1927), in SE1/4SW1/4 sec.18, T.4 N., R.4 W., McDonough County, Hydrologic Unit 07130010, on right bank at downstream side of bridge on State Highway 61, 0.2 mi downstream from a railroad bridge, 1 mi southwest of Colmar, 1.8 mi upstream from Troublesome Creek, and at mile 61.8. |
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DRAINAGE AREA.-- 655 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1944 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1975-91 and 1998. |
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MISCELLANEOUS: Contaminants in streambed sediments, July 1997; contaminants in fish tissue, July 1997; streambank sediment size, October 1997; streambed sediment size, October 1997. |
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BIOLOGICAL |
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BENTHIC MACROINVERTEBRATES: Water years 1996-1998. |
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FISH: Water year 1997 and 1998. |
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HABITAT: Water years 1996-1998. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and crest-stage gage. Datum of gage is 491.53 ft above NGVD of 1929. Prior to July 13, 1945, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 38,900 ft3/s, Mar. 5, 1985, gage height, 26.61 ft; maximum gage height, 27.03 ft, Jan. 3, 1965, ice jam; no flow part of each day Dec. 8, 9, 12, 13, 17, 21, 1955, due to temporary dam upstream; no flow Oct. 19, 1988. |
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REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 25 | 32 | 142 | 424 | e138 | 204 | 381 | 195 | 1330 | 127 | 34 | 111 |
2 | 20 | 36 | 131 | 396 | e137 | 209 | 344 | 226 | 953 | 146 | 32 | 82 |
3 | 17 | 157 | 113 | 392 | e136 | 194 | 310 | 228 | 605 | 195 | 31 | 66 |
4 | 15 | 324 | 109 | 362 | e135 | 238 | 286 | 219 | 464 | 248 | 33 | 55 |
5 | 13 | 996 | 115 | 328 | e134 | 1610 | 263 | 196 | 393 | 190 | 42 | 47 |
6 | 12 | 723 | 124 | 201 | e132 | 1490 | 246 | 186 | 352 | 141 | 38 | 41 |
7 | 13 | 370 | 122 | 242 | e131 | 878 | 240 | 168 | 316 | 172 | 37 | 35 |
8 | 13 | 245 | 113 | 312 | e130 | 602 | 234 | 152 | 282 | 170 | 29 | 32 |
9 | 12 | 187 | 117 | 280 | e128 | 477 | 223 | 137 | 253 | 127 | 23 | 29 |
10 | 12 | 153 | 3580 | 275 | e125 | 412 | 203 | 132 | 969 | 377 | 20 | 26 |
11 | 10 | 137 | 6010 | 250 | e124 | 355 | 190 | 129 | 1790 | 704 | 18 | 24 |
12 | 12 | 130 | 8250 | 258 | e122 | 326 | 182 | 126 | 1080 | 540 | 26 | 23 |
13 | 14 | 118 | 4080 | 259 | e120 | 286 | 175 | 131 | 662 | 271 | 21 | 23 |
14 | 51 | 100 | 1410 | 231 | e120 | 291 | 170 | 143 | 479 | 191 | 16 | 21 |
15 | 142 | 85 | 848 | 222 | e119 | 290 | 166 | 158 | 1150 | 145 | 15 | 375 |
16 | 90 | 82 | 929 | 242 | e119 | 270 | 161 | 146 | 659 | 119 | 14 | 3300 |
17 | 70 | 91 | 970 | 240 | e119 | 285 | 159 | 126 | 355 | 115 | 13 | 1920 |
18 | 52 | 1630 | 714 | 216 | e120 | 296 | 153 | 117 | 294 | 120 | 12 | 549 |
19 | 40 | 1770 | 608 | 191 | e170 | 277 | 144 | 118 | 254 | 100 | 13 | 301 |
20 | 32 | 806 | 493 | e205 | e400 | 248 | 144 | 119 | 225 | 81 | 17 | 216 |
21 | 27 | 499 | 444 | e200 | e850 | 235 | 209 | 113 | 220 | 72 | 31 | 169 |
22 | 25 | 367 | 507 | e180 | 659 | 213 | 277 | 110 | 302 | 66 | 31 | 140 |
23 | 20 | 304 | 991 | e170 | 432 | 199 | 221 | 112 | 257 | 65 | 33 | 121 |
24 | 19 | 289 | 820 | e168 | 362 | 207 | 179 | 178 | 196 | 62 | 26 | 107 |
25 | 39 | 252 | 566 | e162 | 305 | 216 | 202 | 3410 | 168 | 58 | 51 | 96 |
26 | 60 | 216 | 480 | e160 | 236 | 266 | 218 | 2150 | 153 | 52 | 105 | 87 |
27 | 59 | 196 | 439 | e153 | 227 | 401 | 190 | 741 | 138 | 48 | 2060 | 79 |
28 | 53 | 176 | 561 | e152 | 214 | 393 | 163 | 451 | 129 | 45 | 2780 | 74 |
29 | 47 | 155 | 754 | e150 | 202 | 598 | 154 | 337 | 123 | 40 | 845 | 69 |
30 | 42 | 145 | 584 | e148 | --- | 506 | 157 | 374 | 116 | 38 | 281 | 65 |
31 | 39 | --- | 484 | e145 | --- | 418 | --- | 1370 | --- | 36 | 163 | --- |
TOTAL | 1095 | 10771 | 35608 | 7314 | 6346 | 12890 | 6344 | 12498 | 14667 | 4861 | 6890 | 8283 |
MEAN | 35.3 | 359 | 1149 | 236 | 219 | 416 | 211 | 403 | 489 | 157 | 222 | 276 |
MAX | 142 | 1770 | 8250 | 424 | 850 | 1610 | 381 | 3410 | 1790 | 704 | 2780 | 3300 |
MIN | 10 | 32 | 109 | 145 | 119 | 194 | 144 | 110 | 116 | 36 | 12 | 21 |
CFSM | 0.05 | 0.55 | 1.75 | 0.36 | 0.33 | 0.63 | 0.32 | 0.62 | 0.75 | 0.24 | 0.34 | 0.42 |
IN. | 0.06 | 0.61 | 2.02 | 0.42 | 0.36 | 0.73 | 0.36 | 0.71 | 0.83 | 0.28 | 0.39 | 0.47 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 254 | 260 | 276 | 337 | 537 | 704 | 808 | 779 | 704 | 451 | 168 | 254 |
MAX | 3502 | 2693 | 2686 | 2077 | 2384 | 3734 | 3193 | 4471 | 3081 | 4194 | 899 | 4024 |
(WY) | 1987 | 1986 | 1983 | 1974 | 2001 | 1985 | 1973 | 1995 | 1974 | 1993 | 1993 | 1961 |
MIN | 0.67 | 2.61 | 2.54 | 3.33 | 5.70 | 30.5 | 22.9 | 20.8 | 21.1 | 3.89 | 2.82 | 1.75 |
(WY) | 1989 | 1990 | 1990 | 1956 | 1989 | 1956 | 1956 | 1956 | 1988 | 1988 | 1988 | 1988 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1945 - 2004 | |||
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ANNUAL TOTAL | 91389.8 | 127567 | ||||
ANNUAL MEAN | 250 | 349 | 460 | |||
HIGHEST ANNUAL MEAN | 1347 | 1993 | ||||
LOWEST ANNUAL MEAN | 23.1 | 1989 | ||||
HIGHEST DAILY MEAN | 8250 | Dec 12 | 8250 | Dec 12 | 35600 | Mar 5 1985 |
LOWEST DAILY MEAN | 7.3 | Aug 28 | 10 | Oct 11 | 0.00 | Oct 19 1988 |
ANNUAL SEVEN-DAY MINIMUM | 7.7 | Aug 23 | 12 | Oct 6 | 0.12 | Oct 16 1988 |
MAXIMUM PEAK FLOW | 8830 | Dec 12 | 38900 A | Mar 5 1985 | ||
MAXIMUM PEAK STAGE | 22.32 | Dec 12 | 27.03 B | Jan 3 1965 | ||
INSTANTANEOUS LOW FLOW | 9.0 | Oct 11 | ||||
ANNUAL RUNOFF (CFSM) | 0.382 | 0.532 | 0.702 | |||
ANNUAL RUNOFF (INCHES) | 5.19 | 7.25 | 9.54 | |||
10 PERCENT EXCEEDS | 529 | 707 | 1000 | |||
50 PERCENT EXCEEDS | 95 | 170 | 127 | |||
90 PERCENT EXCEEDS | 16 | 29 | 10 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |