Station list     Available data
ILLINOIS RIVER BASIN


05547350                         GRASS LK OUTLET NEAR LOTUS WOODS, IL



LOCATION.--Lat 42°25'33", long 88°09'53", in SW1/4SW1/4 sec. 18, T.46 N., R.9 E., Lake County, Hydrologic Unit 07120006, on right bank of downstream side Grass Lake Road bridge, and at mile 108.5.

DRAINAGE AREA.--919 mi2.

PERIOD OF RECORD.--
SUSPENDED-SEDIMENT DISCHARGE: Dec.1997 to May 1999 (discontinued).

REMARKS.--Suspended-sediment samples were collected twice weekly with more frequent samples collected during high runoff periods.

EXTREMES FOR PERIOD OF RECORD.--
SEDIMENT CONCENTRATION: Maximum daily, 246 mg/L, Nov. 1, 1998; minimum daily, 3 mg/L, Jan. 20-24, 1998.
SEDIMENT LOAD: Maximum daily, 1,090 tons, April 27, 1999; minimum daily, 5.2 tons, Jan. 21, 1998.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
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 e260 38 27 e410 246 272 e480 47 60
2 e265 39 28 e470 56 71 e550 51 76
3 e290 40 31 e430 73 84 e540 59 86
4 e370 42 41 e310 68 57 e560 43 64
5 e380 40 41 e370 41 41 e600 29 47
 
6 e500 38 51 e380 46 47 e620 24 41
7 e720 39 76 e380 30 31 e680 21 39
8 e700 69 131 e390 32 34 e800 18 40
9 e690 71 132 e360 27 26 e740 17 33
10 e680 67 123 e380 44 45 e740 19 39
 
11 e600 63 102 e850 60 137 e680 23 42
12 e560 60 90 e1400 46 176 e620 29 48
13 e500 56 76 e1340 29 106 e580 57 90
14 e440 53 63 e1150 27 83 e560 48 73
15 e380 51 52 e970 153 402 e540 36 52
 
16 e320 49 42 e970 185 486 e500 21 28
17 e340 52 48 e860 178 413 e510 20 27
18 e640 57 98 e770 107 223 e520 28 39
19 e870 62 145 e670 52 95 e480 29 38
20 e820 67 148 e580 28 44 e460 28 35
 
21 e740 109 218 e520 32 45 e470 27 34
22 e620 137 229 e510 37 50 e350 26 25
23 e540 140 203 e480 54 70 e370 27 27
24 e510 139 192 e490 117 155 e420 28 32
25 e510 128 176 e540 135 197 e400 29 31
 
26 e500 120 162 e500 141 190 e430 32 37
27 e480 136 176 e470 142 180 e490 44 58
28 e420 152 173 e460 114 141 e480 58 76
29 e440 136 162 e470 114 145 e440 60 71
30 e420 126 142 e500 77 104 e300 60 49
 
31 e380 210 215 --- --- --- e380 57 58
 
TOTAL 15885 --- 3593 18380 --- 4150 16290 --- 1495
 
JANUARY FEBRUARY MARCH
1 e370 38 38 e1800 30 148 e740 39 78
2 e450 35 43 e1600 31 135 e770 37 78
3 e480 33 42 e1500 32 130 e770 36 74
4 e480 30 39 e1550 33 138 e730 34 68
5 e460 28 35 e1550 34 142 e700 33 62
 
6 e500 26 35 e1500 35 141 e740 32 63
7 e480 24 31 e1400 36 136 e750 30 61
8 e490 22 29 e1300 37 130 e730 29 57
9 e480 21 27 e1200 38 123 e680 28 51
10 e470 19 24 e1200 39 126 e580 27 42
 
11 e490 18 23 e1250 41 137 e520 26 36
12 e520 16 23 e1380 45 168 e660 33 60
13 e510 15 21 e1500 49 200 e740 56 111
14 e500 14 19 e1380 49 183 e720 52 101
15 e520 13 18 e1300 49 170 e630 45 77
 
16 e530 12 17 e1220 48 158 e580 42 66
17 e550 11 16 e1250 47 159 e640 50 87
18 e610 10 17 e1230 46 154 e860 62 144
19 e660 9 17 e1200 46 148 e1150 74 230
20 e660 9 16 e1100 45 134 e940 78 198
 
21 e670 8 15 e1020 44 122 e800 81 174
22 e720 8 15 e950 44 112 e720 84 163
23 e1100 7 21 e900 43 105 e760 87 178
24 e1350 7 26 e820 43 94 e730 90 177
25 e1500 7 28 e750 42 85 e700 93 176
 
26 e1750 7 34 e730 41 82 e660 74 131
27 e1770 11 52 e710 41 78 e620 71 119
28 e1800 17 85 e700 40 76 e560 83 126
29 e1900 26 136 --- --- --- e450 144 175
30 e1850 29 144 --- --- --- e490 177 234
 
31 e1800 30 144 --- --- --- e500 130 175
 
TOTAL 26420 --- 1230 33990 --- 3714 21620 --- 3572
 
APRIL MAY JUNE
1 e490 93 123    e2000 38 207 --- --- ---
2 e500 61 82    e1700 37 172 --- --- ---
3 e520 67 94    e1550 39 162 --- --- ---
4 e520 78 109    e1400 40 152 --- --- ---
5 e500 77 104    e1260 43 146 --- --- ---
 
6 e530 75 107    e1200 58 188 --- --- ---
7 e510 70 97    e1120 78 237 --- --- ---
8 e490 59 78    e1070 80 231 --- --- ---
9 e730 48 94    e1080 78 228 --- --- ---
10 e1000 44 118    e1050 76 216 --- --- ---
 
11 e1150 77 240    e980 76 202 --- --- ---
12 e1130 69 211    e1000 75 203 --- --- ---
13 e1060 38 109    e1080 52 150 --- --- ---
14 e1000 36 99    e1100 32 95 --- --- ---
15 e940 39 99.7 e1050 30 84 --- --- ---
 
16 e920 41 101    e1000 36 96 --- --- ---
17 e970 35 92    e1300 54 188 --- --- ---
18 e900 29 72    e1650 62 275 --- --- ---
19 e810 27 60    e1800 69 337 --- --- ---
20 e700 43 81    e1800 67 326 --- --- ---
 
21 e720 67 130    e1700 64 292 --- --- ---
22 e800 70 151    e1600 59 256 --- --- ---
23 e1100 68 203    e1550 50 211 --- --- ---
24 e1600 69 296    e1520 42 173 --- --- ---
25 e2500 64 430    e1470 36 144 --- --- ---
 
26 e2450 47 310    e1350 39 141 --- --- ---
27 e2400 168 1090    e1280 43 148 --- --- ---
28 e2350 166 1050    e1150 50 154 --- --- ---
29 e2250 112 679    e1050 82 233 --- --- ---
30 e2150 46 270    e860 116 270 --- --- ---
 
31 --- --- ---    e800 105 227 --- --- ---
 
TOTAL 33690 --- 6779.7 40520 --- 6144 --- --- ---
 
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TOTAL --- --- --- --- --- --- --- --- ---
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data