LOCATION.-- Lat 38°17'11", long 88°52'17" (NAD of 1983), in NE1/4NE1/4 sec.9, T.3 S., R.3 E., Jefferson County, Hydrologic Unit 07140106, on left bank on upstream side of bridge on State Highway 142, 0.2 mi downstream from Sevenmile Creek, about 2 mi southeast of Mt. Vernon, and at mile 18.8. | |
DRAINAGE AREA.-- 76.9 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1985 to current year. | |
STAGE: Water years 1995 to current year. October 1985 to September 1994 (8 AM gage heights). Gage-height record for April 1965 to May 1971 available in files of U.S. Army Corps of Engineers. | |
GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 420.00 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers) (419.64 ft NAVD 1988). | |
REMARKS.-- Sewage-treatment plant upstream at Mt. Vernon. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 16,100 ft3/s, May 17, 1990, gage height 17.03 ft; minimum daily discharge, 0.15 ft3/s, Sept 29, 1989. | |
EXTREMES OUTSIDE PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Flood of Apr. 4, 1968, reached a stage of 14.60 ft, from records of U.S. Army Corps of Engineers. | |
REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. Effluent from sewage-treatment plant upstream at Mt. Vernon averaged about 5.0 ft3/s. | |
| Discharge, cubic feet per second, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 4.3 | 260 | 826 | 63 | 61 | 28 | 39 | 52 | 3.7 | e3.8 | 3.5 | 4.6 |
| 2 | 4.1 | 1380 | 197 | 56 | 66 | 23 | 37 | 33 | e3.7 | e3.3 | 3.4 | 4.0 |
| 3 | 4.1 | 278 | 105 | 661 | 115 | 21 | 29 | 26 | e3.5 | e3.1 | 3.4 | 3.7 |
| 4 | 4.2 | 181 | 73 | 806 | 96 | 23 | 25 | 21 | e3.5 | e4.1 | 3.4 | 3.6 |
| 5 | 4.2 | 94 | 58 | 2380 | 72 | 22 | 22 | 18 | e3.4 | e5.0 | 3.5 | 3.7 |
| 6 | 4.3 | 62 | 116 | 3020 | 63 | 20 | 22 | 15 | e3.3 | 3.8 | 3.4 | 3.8 |
| 7 | 4.2 | 48 | 661 | 491 | 504 | 21 | 31 | 13 | 3.5 | 3.5 | 5.6 | 3.7 |
| 8 | 4.5 | 35 | 203 | 278 | 305 | 21 | 36 | 12 | 3.4 | 3.5 | 5.8 | 3.7 |
| 9 | 4.5 | 28 | 108 | 179 | 183 | 16 | 25 | 10 | 3.2 | 3.5 | 3.7 | 3.6 |
| 10 | 4.5 | 25 | e100 | 123 | 152 | 15 | 20 | 10 | 3.5 | 3.4 | 3.9 | 3.5 |
| 11 | 5.1 | 1250 | e80 | 100 | 86 | 15 | 19 | 9.1 | e4.5 | 6.4 | 5.3 | 3.4 |
| 12 | 23 | 1980 | e70 | 99 | 74 | 15 | 96 | 8.2 | e5.0 | 18 | 3.9 | 3.5 |
| 13 | 6.3 | 203 | e61 | 1780 | 904 | 14 | 222 | 7.8 | e4.2 | 5.2 | 6.1 | 3.6 |
| 14 | 12 | 101 | e56 | 1690 | 849 | 12 | 67 | 18 | e4.0 | 4.3 | 33 | 4.4 |
| 15 | 11 | 72 | e52 | 182 | 200 | 11 | 40 | 13 | e4.2 | 4.2 | 26 | 8.5 |
| 16 | e7.0 | 67 | e50 | 104 | 113 | 11 | 28 | 8.4 | e3.5 | 4.0 | 38 | 4.7 |
| 17 | e5.5 | 62 | e46 | 62 | 75 | 11 | 22 | 6.8 | e3.6 | 3.7 | 8.9 | 3.6 |
| 18 | 269 | 70 | e42 | 46 | 56 | 12 | 19 | 6.0 | e4.1 | 3.8 | 5.6 | 3.5 |
| 19 | 130 | 355 | e38 | e44 | 46 | 11 | 16 | 5.8 | e3.6 | 4.6 | 4.9 | 4.9 |
| 20 | 31 | 152 | e36 | e40 | 53 | 10 | 14 | 5.5 | e4.2 | 3.9 | 4.2 | 651 |
| 21 | 18 | 82 | e34 | e40 | 55 | 9.9 | 16 | 5.4 | e3.8 | 3.7 | 3.9 | 31 |
| 22 | 15 | 68 | e32 | e34 | 42 | 59 | 765 | 5.0 | e3.5 | 3.8 | 3.8 | 8.5 |
| 23 | 61 | 67 | e29 | e30 | 35 | 753 | 407 | 4.7 | e3.2 | 3.7 | 3.6 | 5.0 |
| 24 | 95 | 358 | e26 | e29 | 38 | 178 | 109 | 4.5 | e3.5 | 3.7 | 3.7 | 4.0 |
| 25 | 40 | 309 | e26 | e30 | 38 | 128 | 61 | 4.2 | e3.0 | 3.7 | 3.7 | 11 |
| 26 | 471 | 103 | e28 | e28 | 32 | 107 | 102 | 4.1 | e3.3 | 3.8 | 42 | 14 |
| 27 | 2030 | 90 | e28 | e25 | 28 | 224 | 88 | 4.1 | e3.5 | 7.9 | 51 | 6.9 |
| 28 | 261 | 128 | e30 | e23 | 31 | 215 | 50 | 4.4 | e3.3 | 4.2 | 8.9 | 19 |
| 29 | 82 | 99 | 86 | e30 | --- | 86 | 80 | 4.0 | e3.3 | 3.8 | 5.1 | 81 |
| 30 | 57 | 597 | 177 | 74 | --- | 61 | 104 | 3.8 | e3.5 | 3.5 | 6.8 | 17 |
| 31 | 38 | --- | 100 | 79 | --- | 49 | --- | 3.8 | --- | 3.4 | 6.0 | --- |
| TOTAL | 3710.8 | 8604 | 3574 | 12626 | 4372 | 2201.9 | 2611 | 346.6 | 109.5 | 140.3 | 314.0 | 926.4 |
| MEAN | 120 | 287 | 115 | 407 | 156 | 71.0 | 87.0 | 11.2 | 3.65 | 4.53 | 10.1 | 30.9 |
| MAX | 2030 | 1980 | 826 | 3020 | 904 | 753 | 765 | 52 | 5.0 | 18 | 51 | 651 |
| MIN | 4.1 | 25 | 26 | 23 | 28 | 9.9 | 14 | 3.8 | 3.0 | 3.1 | 3.4 | 3.4 |
| CFSM | 1.56 | 3.73 | 1.50 | 5.30 | 2.03 | 0.92 | 1.13 | 0.15 | 0.05 | 0.06 | 0.13 | 0.40 |
| IN. | 1.80 | 4.16 | 1.73 | 6.11 | 2.11 | 1.07 | 1.26 | 0.17 | 0.05 | 0.07 | 0.15 | 0.45 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1986 - 2005, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 15.6 | 89.6 | 61.1 | 117 | 129 | 137 | 159 | 143 | 51.0 | 22.1 | 14.0 | 15.8 |
| MAX | 120 | 542 | 233 | 407 | 383 | 456 | 540 | 809 | 279 | 101 | 129 | 155 |
| (WY) | 2005 | 1994 | 1991 | 2005 | 1986 | 1989 | 1996 | 1995 | 2000 | 1993 | 2004 | 1993 |
| MIN | 2.86 | 3.16 | 4.51 | 4.75 | 10.4 | 24.1 | 21.6 | 4.46 | 2.98 | 2.71 | 1.65 | 2.06 |
| (WY) | 1996 | 2000 | 1990 | 2000 | 1996 | 2001 | 2004 | 1988 | 1991 | 1991 | 1990 | 1995 |
| SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1986 - 2005 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 34227.3 | 39536.5 | ||||
| ANNUAL MEAN | 93.5 | 108 | 79.2 | |||
| HIGHEST ANNUAL MEAN | 123 | 1994 | ||||
| LOWEST ANNUAL MEAN | 21.3 | 1987 | ||||
| HIGHEST DAILY MEAN | 2030 | Oct 27 | 3020 | Jan 6 | 9940 | May 18 1995 |
| LOWEST DAILY MEAN | 3.0 | Aug 16 | 3.0 A | Jun 25 | 0.15 | Sep 29 1989 |
| ANNUAL SEVEN-DAY MINIMUM | 3.1 | Aug 11 | 3.3 B | Jun 23 | 0.38 | Dec 11 1989 |
| MAXIMUM PEAK FLOW | 3720 | Jan 6 | 16100 | May 17 1990 | ||
| MAXIMUM PEAK STAGE | 13.52 | Jan 6 | 17.03 | May 17 1990 | ||
| ANNUAL RUNOFF (CFSM) | 1.22 | 1.41 | 1.03 | |||
| ANNUAL RUNOFF (INCHES) | 16.56 | 19.13 | 13.99 | |||
| 10 PERCENT EXCEEDS | 186 | 201 | 116 | |||
| 50 PERCENT EXCEEDS | 17 | 21 | 11 | |||
| 90 PERCENT EXCEEDS | 4.5 | 3.6 | 3.0 | |||
A - Estimated, but may have been less during period of estimated discharges in June. | |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |