Station list     Available data
UPPER MISSISSIPPI RIVER BASIN


05587455       MISSISSIPPI RIVER BELOW GRAFTON, IL



LOCATION.-- Lat 38°57'04", long 90°22'16", in sec.24, T.6 N., R.11 W., Jersey County, Hydrologic Unit 07110009, 11.3 mi above Lock and Dam 26, 19.0 mi above mouth of Missouri River, and at mile 214.6 upstream from the mouth of the Ohio River.

DRAINAGE AREA.-- 171,300 mi2, approximately.

PERIOD OF RECORD.--
SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1989-94 and 1998-99. National stream-quality accounting network station 1989 to 1994.
 

SEDIMENT: March 1989 to current year.

REMARKS.-- Established ambient water-quality monitoring network station Nov. 1992. Discharge for sediment records obtained from Mississippi River at Grafton.

EXTREMES FOR PERIOD OF RECORD.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,910 mg/L, May 23, 1990; minimum daily mean, 1 mg/L, Sept. 10, 1991.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 1,090,000 tons, May 23, 1990; minimum daily, 186 tons, Sept. 10, 1991.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 331 mg/L, June 26; minimum daily mean, 46 mg/L, Dec. 10.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 239,000 tons, June 26; mimimum daily, 5,920 tons, Nov. 20.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY)
MEAN MEAN MEAN
MEAN CONCEN- SEDIMENT MEAN CONCEN- SEDIMENT MEAN CONCEN- SEDIMENT
DISCHARGE TRATION DISCHARGE DISCHARGE TRATION DISCHARGE DISCHARGE TRATION DISCHARGE
DAY (CFS) (mg/L) (TONS/DAY) (CFS) (mg/L) (TONS/DAY) (CFS) (mg/L) (TONS/DAY)
 
OCTOBER NOVEMBER DECEMBER
1 68500 110 20700 48500 71 9370 62500 61 10300
2 61800 103 16900 38100 70 7130 54400 52 7630
3 58800 102 16400 44300 63 7580 58800 56 8970
4 58300 110 17200 45400 56 6900 54700 57 8410
5 58100 99 15600 47700 53 6780 58900 57 9060
 
6 57500 94 14600 46600 59 7500 58000 57 8970
7 54800 90 13400 46100 63 7870 73500 57 11400
8 56700 90 13700 40400 60 6520 69000 64 11800
9 49000 99 13100 40700 66 7260 58900 62 9810
10 51700 84 11800 42700 70 7980 59500 46 7360
 
11 57800 76 11800 41400 69 7760 66000 51 9050
12 55600 76 11400 51900 63 8880 65300 53 9340
13 55700 91 13600 41800 62 7000 57900 61 9540
14 56000 81 12200 43300 64 7440 55300 59 8860
15 53300 75 10700 43000 55 6400 50700 52 7100
 
16 47500 78 10100 48500 59 7700 54000 47 7620
17 44100 81 9620 45200 57 7000 60800 56 9280
18 48400 91 11800 51100 66 9160 57100 56 8650
19 45900 76 9400 45100 63 7760 60100 63 10300
20 48700 78 10300 40700 54 5920 46000 67 8270
 
21 47100 84 10600 50500 54 7400 43500 67 7880
22 40000 79 8490 51400 54 7430 42000 62 7060
23 46500 83 10400 40200 56 6100 43700 68 8110
24 44400 82 9860 52100 56 7880 48300 91 11900
25 47400 74 9500 53100 53 7530 45400 96 11700
 
26 48200 76 9850 46700 51 6460 41500 72 8080
27 50900 74 10200 55900 51 7630 45200 76 9300
28 44200 79 9510 55300 53 7940 42300 81 9320
29 48400 77 10000 58800 58 9150 45600 77 9490
30 51500 76 10600 55900 61 9270 52000 78 11000
 
31 45900 73 9010 --- --- --- 52700 82 11700
 
JANUARY FEBRUARY MARCH
1 54900 77 11500 37300 77 7720 108000 176 51600
2 59500 74 11800 36900 74 7410 99500 152 40900
3 53700 71 10300 38200 81 8210 107000 162 47000
4 45100 74 9000 30500 118 9760 112000 171 51600
5 49300 79 10600 36400 104 10200 113000 138 42300
 
6 54300 76 11200 42800 96 11200 114000 141 43200
7 40400 72 7760 40000 97 10500 111000 132 39600
8 44500 80 9650 42600 70 8070 107000 143 41300
9 46100 77 9590 37100 69 6940 101000 151 41300
10 43800 72 8480 35800 76 7360 99100 157 42100
 
11 39700 74 7910 32700 100 8800 103000 145 40300
12 51800 73 10200 41400 108 12100 102000 137 38000
13 48800 85 11200 37900 80 8130 96400 130 33600
14 47700 116 15000 38300 78 8110 93000 123 30900
15 45400 91 11200 39000 88 9330 85700 122 28200
 
16 36400 75 7400 36700 96 9520 88500 138 33000
17 42500 64 7420 46200 95 11900 92700 149 37200
18 37800 71 7230 43700 100 11600 92800 144 36100
19 36700 77 7600 40300 105 11400 83200 142 31800
20 34100 77 7080 40600 77 8400 77800 140 29400
 
21 37000 74 7410 38700 79 8230 74700 126 25400
22 39300 82 8490 34900 86 8080 77500 120 25000
23 31900 101 8720 39500 85 9090 77200 107 22300
24 32900 96 8490 41900 87 9750 67600 79 14300
25 31200 90 7550 46300 92 11600 64300 93 16100
 
26 35100 79 7440 74200 101 20600 60700 114 18800
27 42100 68 7720 104000 162 46000 65500 113 20200
28 44000 69 8250 113000 196 60000 53500 80 11700
29 45400 71 8700 113000 199 60800 63600 109 18700
30 39100 73 7700 --- --- --- 67100 131 23700
 
31 39600 75 7990 --- --- --- 64700 103 18000
 
APRIL MAY JUNE
1 69400 88 16500 108000 215 62600 103000 167 46600
2 61100 105 17300 99500 222 59700 120000 191 62500
3 62400 107 18000 101000 185 50400 139000 214 80200
4 53000 106 15100 94200 146 37000 135000 256 93400
5 63400 103 17600 86500 154 35700 150000 244 99100
 
6 61600 91 15200 85300 152 35000 166000 259 116000
7 60700 112 18400 89300 150 36100 171000 275 127000
8 52200 114 16000 77000 164 34100 173000 288 135000
9 54900 96 14400 73700 120 23900 179000 293 142000
10 54900 80 12100 74600 130 26200 184000 294 146000
 
11 56800 103 15800 80000 150 32400 189000 284 145000
12 56400 92 14100 79600 155 33400 200000 320 172000
13 64000 117 20200 75100 143 29000 206000 286 159000
14 56600 121 18400 77600 122 25600 208000 246 138000
15 51500 120 16600 81000 137 29800 214000 241 139000
 
16 50100 128 17400 79700 150 32400 216000 243 142000
17 50300 131 17900 79900 146 31500 220000 246 147000
18 56100 117 17700 83800 131 29600 226000 278 170000
19 63300 123 21300 77300 121 25200 231000 254 158000
20 47700 140 17800 74100 121 24200 234000 265 168000
 
21 67800 138 25600 92100 146 36600 245000 282 187000
22 103000 156 44000 99000 156 41900 244000 264 174000
23 121000 188 61300 106000 192 54800 237000 257 164000
24 106000 184 52200 107000 179 51600 249000 274 184000
25 103000 225 62500 110000 174 51900 260000 273 191000
 
26 106000 197 56100 109000 191 56400 267000 331 239000
27 105000 202 57000 120000 217 71100 281000 296 224000
28 106000 197 56600 124000 316 106000 289000 225 176000
29 106000 209 60100 116000 215 67200 291000 264 207000
30 113000 192 58300 113000 166 50500 281000 242 183000
 
31 --- --- --- 111000 152 45500 --- --- ---
 
JULY AUGUST SEPTEMBER
1 266000 245 176000 80000 93 20100 64100 65 11200
2 252000 232 158000 76800 104 21500 59600 75 12000
3 244000 230 152000 86400 135 31500 56800 67 10300
4 236000 229 146000 89600 144 34800 57000 69 10600
5 231000 219 136000 83700 167 37700 50200 75 10200
 
6 228000 203 125000 65300 118 20800 53500 67 9750
7 229000 260 161000 65900 96 17100 53800 66 9550
8 228000 273 168000 79600 85 18100 49500 62 8320
9 224000 272 164000 79200 116 24800 53200 66 9460
10 209000 306 173000 77400 116 24200 55900 62 9440
 
11 174000 226 106000 77100 106 22100 58700 69 10900
12 170000 241 110000 70700 88 16900 51000 69 9620
13 171000 238 110000 71200 78 15000 53800 72 10500
14 173000 229 107000 52500 70 9890 62200 72 12000
15 186000 232 116000 50700 71 9730 65400 96 17100
 
16 194000 191 100000 57100 77 12200 68000 96 17700
17 203000 186 102000 61600 112 18500 71000 75 14400
18 208000 229 129000 64800 111 19500 78800 71 15100
19 217000 227 133000 64600 90 15700 74300 86 17200
20 214000 214 124000 70800 79 15100 64300 83 14500
 
21 208000 223 125000 67100 84 15100 66800 76 13700
22 204000 204 113000 65400 77 13700 72400 89 17300
23 201000 184 99800 69300 74 13800 58600 102 16000
24 190000 195 100000 79200 86 18500 54600 118 17400
25 151000 180 73500 86200 88 20600 61000 103 17000
 
26 121000 133 43500 75800 80 16300 72800 95 18800
27 98000 123 32300 63300 73 12500 77000 90 18600
28 97200 129 33900 59800 65 10400 60500 88 14500
29 89400 141 33900 52100 70 9810 60000 96 15500
30 71800 124 24100 48800 72 9480 58900 98 16200
 
31 82100 102 22600 58600 64 10200 --- --- ---


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data