Station list
Available data
ILLINOIS RIVER BASIN
05554500 VERMILION RIVER AT PONTIAC, IL
LOCATION.--Lat 40°52'40", long 88°38'10", in SE1/4SW1/4 sec.22, T.28 N., R.5 E., Livingston County, Hydrologic Unit
07130002, near center of span on downstream side of bridge on Vermilion Street in Pontiac, 0.1 mi upstream from State Highway
116, 0.8 mi upstream from Turtle Creek, and at mile 60.3.
DRAINAGE AREA.--579 mi2.
PERIOD OF RECORD.--October 1942 to current year.
REVISED RECORDS.--WDR IL-75-1: Drainage area. WDR IL-83-2: 1951, 1957, 1965(M), 1968, 1970, 1980. WDR IL-98: 1997 (P).
GAGE.--Water-stage recorder. Datum of gage is 619.45 ft above sea level. Prior to Nov. 8, 1965, nonrecording gage at same site
and datum.
REMARKS.--Records good except those for estimated daily discharges, which are poor. An average of 3 ft3/s, diverted 0.5 mi
upstream from station for water supply of city of Pontiac, is not included in records. U.S. Army Corps of Engineers satellite
telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
|
|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP
|
|---|
|
|
| 1 | 5.5 | 17 | 8.3 | 8.4 | 936 | 705 | 221 | 721 | 244 | 259 | 19 | 2.6
|
| 2 | 5.8 | 14 | 6.7 | 12 | 1100 | 513 | 221 | 631 | 275 | 416 | 21 | 2.0
|
| 3 | 9.0 | 13 | 8.6 | 9.0 | 1110 | 563 | 207 | 570 | 446 | 389 | 23 | 1.4
|
| 4 | 9.1 | 14 | 12 | 5.5 | 838 | 707 | 206 | 518 | 387 | 279 | 16 | 1.0
|
| 5 | 11 | 13 | 13 | 3.9 | 611 | 548 | 204 | 485 | 497 | 218 | 12 | .76
|
|
|
| 6 | 13 | 12 | 21 | e4.5 | 487 | 560 | 186 | 478 | 493 | 183 | 11 | .54
|
| 7 | 11 | 11 | 23 | e7.4 | 469 | 723 | 193 | 507 | 391 | 162 | 11 | .41
|
| 8 | 11 | 10 | 22 | e7.4 | 681 | 615 | 188 | 460 | 332 | 143 | 15 | .35
|
| 9 | 9.0 | 12 | 21 | e7.2 | 1200 | 503 | 203 | 398 | 294 | 127 | 17 | .27
|
| 10 | 7.8 | 19 | 20 | e6.9 | 1250 | 500 | 225 | 355 | 269 | 114 | 17 | .20
|
|
|
| 11 | 7.2 | 13 | 16 | e6.7 | 926 | 407 | 202 | 346 | 280 | 101 | 19 | .17
|
| 12 | 6.3 | 17 | 15 | e6.5 | 750 | 349 | 217 | 368 | 531 | 87 | 27 | .31
|
| 13 | 5.7 | 19 | 13 | e6.3 | 583 | 341 | 204 | 1340 | 3270 | 80 | 26 | .57
|
| 14 | 5.9 | 26 | 12 | e6.1 | 477 | 349 | 193 | 1850 | 6250 | 72 | 26 | .42
|
| 15 | 5.7 | 22 | 12 | e6.0 | 404 | 374 | 234 | 1410 | 4040 | 64 | 26 | .34
|
|
|
| 16 | 4.6 | 17 | 12 | e5.8 | 374 | 568 | 2240 | 1040 | 2070 | 56 | 27 | .30
|
| 17 | 5.4 | 15 | 11 | e6.0 | 345 | 1370 | 6370 | 964 | 1380 | 50 | 22 | .30
|
| 18 | 8.3 | 16 | 7.7 | e6.6 | 320 | 1310 | 5520 | 1020 | 1000 | 50 | 20 | .30
|
| 19 | 7.8 | 11 | 4.6 | e7.3 | 288 | 810 | 3140 | 745 | 757 | 44 | 16 | .30
|
| 20 | 7.4 | 7.3 | 4.9 | e8.8 | 260 | 579 | 2020 | 590 | 613 | 48 | 9.8 | .28
|
|
|
| 21 | 6.3 | 8.7 | 6.4 | e13 | 234 | 500 | 1560 | 510 | 515 | 53 | 7.1 | .24
|
| 22 | 6.7 | 9.1 | 8.6 | 30 | 214 | 435 | 1500 | 468 | 465 | 47 | 5.0 | .22
|
| 23 | 6.2 | 6.7 | 9.7 | 111 | 210 | 376 | 3240 | 423 | 431 | 38 | 5.7 | .19
|
| 24 | 6.2 | 6.0 | 9.7 | 1070 | 207 | 338 | 2750 | 403 | 512 | 38 | 15 | .18
|
| 25 | 6.3 | 7.2 | 9.4 | 1860 | 201 | 303 | 1750 | 368 | 476 | 30 | 13 | .17
|
|
|
| 26 | 6.0 | 5.9 | 9.3 | 1630 | 195 | 269 | 1320 | 326 | 374 | 25 | 11 | .18
|
| 27 | 7.0 | 8.2 | 9.3 | 1500 | 235 | 251 | 1080 | 292 | 320 | 22 | 8.7 | .25
|
| 28 | 11 | 9.9 | 9.1 | 2410 | 754 | 246 | 912 | 271 | 290 | 22 | 6.9 | 1.2
|
| 29 | 25 | 12 | 8.4 | 2250 | --- | 238 | 875 | 260 | 258 | 20 | 5.7 | 1.8
|
| 30 | 32 | 11 | 7.9 | 1400 | --- | 220 | 856 | 249 | 228 | 18 | 4.7 | .57
|
|
|
| 31 | 22 | --- | 8.1 | 1040 | --- | 210 | --- | 241 | --- | 19 | 3.5 | ---
|
| TOTAL | 291.2 | 383.0 | 359.7 | 13452.3 | 15659 | 15780 | 38237 | 18607 | 27688 | 3274 | 467.1 | 17.82
|
| MEAN | 9.39 | 12.8 | 11.6 | 434 | 559 | 509 | 1275 | 600 | 923 | 106 | 15.1 | .59
|
| MAX | 32 | 26 | 23 | 2410 | 1250 | 1370 | 6370 | 1850 | 6250 | 416 | 27 | 2.6
|
| MIN | 4.6 | 5.9 | 4.6 | 3.9 | 195 | 210 | 186 | 241 | 228 | 18 | 3.5 | .17
|
| CFSM | .02 | .02 | .02 | .75 | .97 | .88 | 2.20 | 1.04 | 1.59 | .18 | .03 | .00
|
| IN. | .02 | .02 | .02 | .86 | 1.01 | 1.01 | 2.46 | 1.20 | 1.78 | .21 | .03 | .00
|
e Estimated
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1943 - 1999, BY WATER YEAR (WY)
|
|---|
| MEAN | 138 | 232 | 341 | 377 | 498 | 752 | 823 | 735 | 560 | 323 | 126 | 123
|
| MAX | 1682 | 2327 | 2773 | 1981 | 1758 | 3123 | 2801 | 2968 | 2232 | 2350 | 1186 | 1540
|
| (WY) | 1994 | 1986 | 1983 | 1993 | 1997 | 1979 | 1957 | 1943 | 1980 | 1951 | 1943 | 1989
|
| MIN | .000 | 1.46 | 4.58 | 3.03 | 6.71 | 23.7 | 109 | 71.1 | 27.0 | .000 | .000 | .000
|
| (WY) | 1989 | 1954 | 1954 | 1977 | 1963 | 1964 | 1977 | 1964 | 1988 | 1988 | 1988 | 1988
|
| SUMMARY STATISTICS | FOR 1998 CALENDAR YEAR | FOR 1999 WATER YEAR | WATER YEARS 1943 - 1999 |
|---|
| ANNUAL TOTAL | 232348.7 | | 134216.12 | | |
|
| ANNUAL MEAN | 637 | | 368 | | 418 |
|
| HIGHEST ANNUAL MEAN | | | | | 1094 | 1993
|
| LOWEST ANNUAL MEAN | | | | | 49.7 | 1964
|
| HIGHEST DAILY MEAN | 8440 | May 8 | 6370 | Apr 17 | 12300 | Dec 4 1982
|
| LOWEST DAILY MEAN | 2.0 | Sep 17 | .17 | Sep 11, 15 | .00 | A
|
| ANNUAL SEVEN-DAY MINIMUM | 4.3 | Sep 14 | .20 | Sep 21 | .00 | Jul 1 1988
|
| INSTANTANEOUS PEAK FLOW | | | 6870 | Apr 17 | 13100 | Dec 4 1982
|
| INSTANTANEOUS PEAK STAGE | | | 13.35 | Apr 17 | 19.16 | Dec 4 1982
|
| INSTANTANEOUS LOW FLOW | | | .12 | B | |
|
| ANNUAL RUNOFF (CFSM) | 1.10 | | .64 | | .72 |
|
| ANNUAL RUNOFF (INCHES) | 14.93 | | 8.62 | | 9.81 |
|
| 10 PERCENT EXCEEDS | 1510 | | 1010 | | 1060 |
|
| 50 PERCENT EXCEEDS | 214 | | 38 | | 134 |
|
| 90 PERCENT EXCEEDS | 7.4 | | 4.8 | | 6.8 |
|
A - Many days in 1953, 1983-84, 1986-91.
B - Sept. 10, 11, 23, 25, 26