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.46N., R.9E., 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 Sept. 1998.

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, 207 mg/L, Jan. 7, 1998; minimum daily, 3 mg/L, Jan. 20-24, 1998.
SEDIMENT LOAD: Maximum daily, 540 tons, Jan. 6, 1998; minimum daily, 5.2 tons, Jan. 21, 1998.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
MEANMEANMEAN
MEANCONCEN-SEDIMENTMEANCONCEN-SEDIMENTMEANCONCEN-SEDIMENT
DISCHARGETRATIONDISCHARGEDISCHARGETRATIONDISCHARGEDISCHARGETRATIONDISCHARGE
DAY(CFS)(MG/L)(TONS/DAY)(CFS)(MG/L)(TONS/DAY)(CFS)(MG/L)(TONS/DAY)
 
OCTOBERNOVEMBERDECEMBER



1------------------e5606193
2------------------e61087144
3------------------e620115192
4------------------e630109185
5------------------e64099172
 
6------------------e61091150
7------------------e60083134
8------------------e59076121
9------------------e57069106
10------------------e5206389
 
11------------------e5005980
12------------------e5006385
13------------------e5006892
14------------------e5007399
15------------------e49079105
 
16------------------e50085115
17------------------e50092124
18------------------e500100134
19------------------e490107142
20------------------e490116153
 
21------------------e510125172
22------------------e500135182
23------------------e500144195
24------------------e500138186
25------------------e490128169
 
26------------------e500118160
27------------------e480110142
28------------------e400104112
29------------------e530140200
30------------------e450130158
 
31------------------e380113116
 
TOTAL------------------16160---4307

 
JANUARYFEBRUARYMARCH



1e400104112   e620914e103068189
2e540116170   e7001325e103062172
3e600134216   e9802053e103057158
4e700153290   e10502981e96046119
5e900176428   e9702874e9001025
 
6e990202540   e9602769e870920
7e860207480   e9402563e820818
8e1200144468   e9002457e9201024
9e110098290   e8602252e11001133
10e80066143   e7602959e1000925
 
11e7304588   e93097244e7201019
12e6903056   e1300106374e6902852
13e6702037   e1550103432e75072145
14e6601425   e1450100393e85048111
15e660917   e135097355e9002664
 
16e660611   e135094344e8202147
17e67059.6e138092342e6801935
18e67058.3e140089338e8402557
19e66047.1e135089324e11003398
20e65036.1e130089312e122034113
 
21e63035.2e120089287e115034104
22e62035.3e118089282e108036104
23e61035.4e115088274e105049140
24e60035.6e115088274e105070198
25e58045.7e110088262e103091254
 
26e57045.9e105088248e90093227
27e56046.1e95082209e74094187
28e55056.8e98074197e72089173
29e56058.0---------e72068132
30e58069.5---------e73053105
 
31e590711   ---------e100051137
 
TOTAL21260---3476.630860---603828400---3285

 
APRILMAYJUNE



1e130049173e93057144e62086144
2e140049185e9403383e62079132
3e137056209e9302869e58074116
4e135067245e8802356e5207098
5e130080281e8002145e4106976
 
6e125092312e7802247e3808284
7e120085274e10002567e420100113
8e118074236e140032119e410118131
9e140075283e150055223e420122139
10e160062268e145051199e430125145
 
11e160053229e132046165e450127154
12e120046148e125057193e550129192
13e110041122e114072223e660135241
14e120045146e103092255e610149245
15e130048168e920112277e590164261
 
16e140041154e820110243e560181273
17e152033137e700105198e490156206
18e150028115e600100163e4008793
19e138027100e54097142e520109153
20e12802793e560100152e650120211
 
21e132037132e660105186e54078114
22e140050188e600109177e4907295
23e140047180e520114160e4007075
24e130044153e430116134e3406762
25e120040131e470118149e3606664
 
26e115039120e510119164e60070114
27e117037118e520121170e76075154
28e105037106e440126150e100085230
29e97047122e530150215e1120122370
30e92060149e570166256e1080115336
 
31---------e620118198---------
 
TOTAL38710---527725360---502216980---4821

 
JULYAUGUSTSEPTEMBER



1e100072195e2506946e3606564
2e86074172e2357548e3606563
3e70075142e2307748e2805844
4e76075155e2707857e2705036
5e73072142e50080108e2904434
 
6e68069126e125087295e2904233
7e5606599e1200135438e3404138
8e5906299e1100110326e4104044
9e6105997e92082204e3603736
10e6005691e97063166e3403532
 
11e4805369e100060162e2503322
12e4505162e96059153e2353120
13e4304856e96058150e2503020
14e3904648e98056148e2902923
15e3504441e94054137e4403440
 
16e3405752e86053122e5203854
17e330133118e75055110e4703444
18e320126109e6205795e4304046
19e31010890e5206084e3504846
20e3009677e4106269e3305751
 
21e32010692e2706648e3005747
22e370123123e3207161e3005746
23e390124131e3207565e2805643
24e4107381e3207766e2605639
25e4006368e4706279e2605639
 
26e3605958e6105591e2505537
27e2905644e3806163e2605639
28e2405636e3906366e2605640
29e2405636e3706464e2605640
30e2505738e3506461e2605236
 
31e2606244e3506561---------
 
TOTAL14320---279119075---36919555---1196
e Estimated

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data