Station list     Available data
ILLINOIS RIVER BASIN


05585000       LA MOINE RIVER AT RIPLEY, IL

 

LOCATION.-- Lat 40°01'29", long 90°37'54" (NAD of 1927), in SW1/4NE1/4 sec.33, T.1 N., R.2 W., Brown County, Hydrologic Unit 07130010, on deck of bridge on old U.S. Highway 24, 600 ft downstream from bridge on new U.S. Highway 24, 0.2 mi east of Ripley, 2 mi upstream from Town Branch, and at mile 12.3.

 

DRAINAGE AREA.-- 1,293 mi2.

 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

 

DISCHARGE: March 1921 to current year. Prior to October 1931, published as Crooked Creek at Ripley.

 

STAGE: Water years 1994-2002.

SURFACE-WATER QUALITY

 

SEDIMENT: Water years 1981 and 1995-97.

 

CHEMICAL: Water years 1975-91.

 

SPECIFIC CONDUCTANCE: Water year 1979.

 

WATER TEMPERATURE: Water year 1979.

 

REVISED RECORDS.-- WSP 975: 1936. WSP 1208: 1925, 1929, 1933. WDR IL-75-1: Drainage area.

 

GAGE.-- U.S. Army Corps of Engineers water-stage recorder, satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 431.1 ft above NGVD of 1929. Prior to July 28, 1926, nonrecording gage at site 200 ft upstream at datum 0.02 ft higher. July 28, 1926 to Jan. 11, 1935, nonrecording gage at present site and datum.

 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 28,000 ft3/s, Mar. 7, 1985, gage height, 29.07 ft; maximum gage height, 29.15 ft, May 18, 1995, observed; no flow for part of Sept. 26, 1989.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 7,140 mg/L, June 21, 1981; minimum daily mean, 5 mg/L, Dec. 4, 5, 1996.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 212,000 tons, May 8, 1996; minimum daily, 0.87 tons, Jan. 20, 1997.

 

REMARKS FOR CURRENT YEAR.-- Records fair except those for Feb. 4 to Apr. 4, May 12-19, and those for estimated daily discharges, which are poor.

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
165 328 379 e230 6220 558 495 5340 954 432 181 200 
261 394 373 e210 5320 682 457 5950 1350 394 137 173 
357 344 341 e200 3420 762 425 3540 1470 364 112 152 
454 297 309 e190 2050 630 412 2060 1040 336 97 134 
5117 264 293 e200 1520 618 375 1510 1180 316 87 120 
 
6216 241 289 e210 1110 932 342 1510 1890 295 91 109 
7325 229 282 e215 992 1520 342 1710 1730 274 78 99 
8260 222 272 e220 925 1660 983 1580 970 253 71 90 
9202 213 256 e225 842 1820 3300 6770 741 237 72 85 
10160 206 243 e230 978 2380 3880 6130 648 223 85 81 
 
11131 198 230 e240 2180 2080 2950 5980 2030 230 75 75 
12195 188 228 e245 2380 1460 1910 12900 5770 218 66 70 
13308 186 265 e250 1830 1200 1560 17600 7990 240 61 66 
14626 182 339 256 1390 1050 1280 19400 9420 204 60 63 
15724 177 456 246 1130 965 1080 19600 8550 186 59 65 
 
161210 174 397 232 1000 874 964 16900 10200 169 62 62 
171470 172 365 210 893 799 850 13000 11700 155 64 59 
18762 167 363 193 807 688 745 9820 11100 143 81 58 
19493 162 361 201 732 640 672 7110 9180 137 216 59 
20387 156 336 199 774 624 630 3480 5500 384 206 62 
 
21321 153 310 193 1580 609 1060 1830 1450 1040 442 60 
22295 158 325 192 2050 567 1880 1280 1000 383 228 58 
232070 152 679 194 1400 515 2270 1210 854 215 976 61 
242850 219 970 208 1070 481 2360 1170 769 199 2530 59 
252180 392 734 204 949 509 2980 1650 703 193 3250 57 
 
261110 774 431 183 860 503 2600 2220 670 162 3320 54 
27700 695 e360 184 751 482 3990 2400 667 133 2300 52 
28531 577 e370 189 634 464 6240 1690 592 132 711 50 
29444 481 e360 187 --- 469 5400 1280 540 207 389 49 
30395 422 e310 526 --- 498 5110 1040 479 260 293 48 
 
31358 --- e260 5710 --- 501 --- 909 --- 256 236 --- 

TOTAL19077852311486123724578727540575421785691011378370166362430
MEAN615.4284.1370.5399.11635888.4191857603371270.0536.681.00
MAX28507749705710622023806240196001170010403320200
MIN541522281836344643429094791325948
CFSM0.480.220.290.311.260.691.484.452.610.210.420.06
IN.0.550.250.330.361.320.791.665.142.910.240.480.07

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1921 - 2002, BY WATER YEAR (WY)
MEAN433.4511.4490.3623.610641316158314401175780.9356.5433.2
MAX574759495060333838995785567892576336597515915726
(WY)198719861983194619851985194419951990199319321961
MIN7.069.087.9213.29.9661.411621.342.516.111.45.13
(WY)195719901990195419891941193419341936193619361988

SUMMARY STATISTICSFOR 2001 CALENDAR YEARFOR 2002 WATER YEARWATER YEARS 1921 - 2002
ANNUAL TOTAL376191         489469         
ANNUAL MEAN1031         1341         849.4      
HIGHEST ANNUAL MEAN2452         1993
LOWEST ANNUAL MEAN50.2      1989
HIGHEST DAILY MEAN8330      A    Feb 1419600      A    May 1526800         Mar 7 1985
LOWEST DAILY MEAN43      B    Jan 2848             Sep 300.96    Sep 25 1989
ANNUAL SEVEN-DAY MINIMUM49             Jan 2253             Sep 241.8      Sep 22 1989
MAXIMUM PEAK FLOW20000      A    May 1528000      CMar 7 1985
MAXIMUM PEAK STAGE28.41 A    May 1529.15 DMay 18 1995
INSTANTANEOUS LOW FLOW48             Sep 29,300.00    Sep 26 1989
ANNUAL RUNOFF (CFSM)0.80    1.04    0.66    
ANNUAL RUNOFF (INCHES)10.82    14.08    8.93    
10 PERCENT EXCEEDS2860         3090         2250         
50 PERCENT EXCEEDS416         395         237         
90 PERCENT EXCEEDS66         83         28         

A - Backwater from Illinois River.

B - Estimated due to backwater from ice.

C - Gage height, 29.07 ft.

D - Observed.



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data