07020500 DATA: Sediment Tables, 1999

Station list Available data
LOWER MISSISSIPPI RIVER BASIN

07020500 MISSISSIPPI RIVER AT CHESTER, IL

LOCATION.--Lat 37°54'10", long 89°50'10", in SW 1/4 sec.24, T.7 S., R.7 W., third principal meridian, Randolph County, Hydrologic Unit 07140105, on downstream side of left pier of main truss of highway bridge at Chester, 8.1 mi downstream from Kaskaskia River, and at mile 109.9 above Ohio River.

DRAINAGE AREA.--708,600 mi², approximately.

PERIOD OF DAILY RECORD.--
SUSPENDED-SEDIMENT: August 1980 to current year.

REMARKS.--Estimated daily load: Jan. 1-18, 21-24, and June 19-27. Sediment records fair.

EXTREMES FOR PERIOD OF DAILY RECORD.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 3,380 mg/L, Apr. 13, 1987; minimum daily mean, 13 mg/L, Mar. 18, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,330,000 tons, Feb. 25, 1997; minimum daily, 3,580 tons, Mar. 18, 1981.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,880 mg/L, Oct. 9; minimum daily mean, 113 mg/L, Sept. 9.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 2,050,000 tons, Oct. 9; minimum daily, 36,300 tons, Sept. 28.

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	146000	165	65100	203000	288	158000	208000	217	122000
2	148000	164	65400	202000	291	159000	195000	209	110000
3	151000	149	61100	224000	383	234000	202000	237	130000
4	163000	144	63500	297000	755	619000	219000	235	139000
5	162000	144	62900	373000	1070	1080000	219000	247	146000

6	168000	162	74300	404000	1360	1480000	210000	249	141000
7	282000	516	427000	400000	1320	1420000	201000	246	134000
8	382000	1560	1630000	377000	1180	1210000	211000	230	132000
9	405000	1880	2050000	346000	1060	993000	247000	300	202000
10	394000	1480	1570000	319000	958	825000	275000	482	358000

11	372000	1230	1230000	325000	901	792000	258000	476	332000
12	335000	1020	921000	356000	977	942000	234000	335	211000
13	286000	846	652000	370000	878	878000	223000	294	177000
14	241000	683	445000	369000	986	983000	209000	268	152000
15	211000	522	298000	356000	906	870000	200000	220	119000

16	193000	410	214000	330000	794	706000	188000	211	107000
17	186000	331	166000	304000	728	597000	182000	213	105000
18	188000	270	137000	285000	638	491000	181000	209	102000
19	221000	314	191000	277000	543	406000	176000	202	96400
20	290000	624	498000	270000	415	302000	176000	197	93500

21	344000	1040	973000	259000	400	279000	173000	191	89200
22	367000	1030	1020000	246000	362	240000	171000	185	85500
23	357000	1020	985000	240000	320	207000	163000	181	79400
24	325000	998	875000	235000	298	189000	161000	183	79200
25	288000	791	615000	228000	259	159000	157000	185	78300

26	256000	534	370000	230000	239	148000	138000	185	69000
27	231000	364	226000	225000	233	141000	123000	168	56000
28	216000	322	188000	222000	276	165000	126000	176	60100
29	209000	299	169000	219000	261	154000	126000	182	61800
30	205000	292	162000	213000	247	142000	122000	181	59500

31	206000	290	161000	---	---	---	115000	179	55500


	JANUARY			FEBRUARY			MARCH

1	106000	---	49000	310000	559	469000	206000	163	90700
2	108000	---	49400	342000	826	766000	195000	174	91500
3	107000	---	49100	351000	857	812000	195000	195	102000
4	107000	---	49000	335000	787	711000	199000	217	117000
5	110000	---	50700	316000	656	560000	203000	235	129000

6	110000	---	50800	307000	533	441000	211000	252	144000
7	119000	---	63000	340000	537	498000	213000	263	151000
8	121000	---	64100	393000	688	733000	210000	235	133000
9	115000	---	58800	423000	697	797000	214000	250	145000
10	109000	---	53100	415000	746	836000	245000	357	242000

11	107000	---	52200	390000	628	661000	292000	497	393000
12	107000	---	52200	362000	488	476000	302000	608	495000
13	111000	---	54200	337000	389	354000	286000	560	433000
14	115000	---	58300	326000	359	316000	273000	479	353000
15	114000	---	60200	320000	340	293000	262000	403	285000

16	122000	---	71900	306000	322	266000	241000	280	182000
17	136000	---	106000	288000	316	246000	233000	229	144000
18	157000	---	157000	275000	329	244000	231000	234	146000
19	165000	330	147000	269000	334	243000	228000	258	159000
20	170000	292	134000	270000	313	229000	239000	251	162000

21	172000	---	131000	265000	289	206000	244000	234	154000
22	179000	---	136000	252000	267	181000	233000	219	138000
23	212000	---	182000	235000	257	163000	218000	231	136000
24	289000	---	355000	229000	251	155000	219000	274	162000
25	313000	645	544000	226000	262	160000	231000	262	164000

26	304000	757	620000	214000	272	157000	233000	243	153000
27	290000	710	555000	208000	216	121000	224000	208	125000
28	278000	606	454000	211000	184	105000	216000	209	122000
29	268000	533	386000	---	---	---	214000	212	122000
30	266000	476	342000	---	---	---	201000	170	92600

31	280000	481	364000	---	---	---	188000	173	87900


	APRIL			MAY			JUNE

1	185000	162	80800	529000	812	1160000	459000	562	696000
2	178000	143	68400	540000	851	1240000	454000	489	600000
3	184000	142	71300	545000	869	1280000	450000	407	494000
4	211000	187	107000	536000	761	1100000	449000	397	481000
5	209000	160	90800	521000	662	931000	453000	388	474000

6	201000	128	69800	515000	653	909000	454000	453	556000
7	207000	160	89800	527000	676	963000	449000	544	660000
8	211000	193	110000	543000	666	976000	442000	569	678000
9	224000	224	136000	551000	638	949000	435000	573	673000
10	252000	263	180000	543000	603	883000	422000	574	654000

11	294000	376	300000	514000	521	723000	410000	574	635000
12	295000	553	439000	477000	519	668000	401000	594	643000
13	282000	581	443000	448000	428	518000	397000	622	666000
14	284000	517	396000	418000	388	437000	395000	652	695000
15	293000	454	360000	399000	378	408000	390000	690	726000

16	304000	418	343000	400000	384	415000	391000	642	677000
17	354000	512	494000	409000	440	486000	395000	632	674000
18	426000	813	943000	419000	508	574000	398000	562	604000
19	472000	1240	1590000	430000	560	650000	396000	---	548000
20	495000	1290	1730000	447000	661	799000	388000	---	504000

21	507000	1120	1540000	464000	664	833000	379000	---	463000
22	509000	956	1310000	477000	733	945000	371000	---	426000
23	501000	835	1130000	482000	852	1110000	366000	---	399000
24	484000	735	961000	478000	981	1260000	367000	---	407000
25	471000	657	834000	475000	923	1180000	363000	---	413000

26	475000	602	771000	478000	884	1140000	357000	---	417000
27	489000	657	869000	481000	1090	1420000	356000	---	427000
28	502000	748	1020000	479000	1040	1350000	347000	457	427000
29	515000	782	1090000	476000	857	1100000	331000	477	426000
30	520000	759	1070000	470000	740	939000	324000	424	371000

31	---	---	---	464000	645	809000	---	---	---


	JULY			AUGUST			SEPTEMBER

1	341000	566	523000	257000	279	193000	152000	122	50100
2	381000	792	818000	262000	292	207000	148000	121	48500
3	410000	986	1090000	264000	289	206000	143000	123	47400
4	422000	1160	1320000	259000	281	196000	143000	124	48000
5	413000	1100	1230000	248000	274	183000	139000	126	47100

6	389000	1000	1050000	238000	267	171000	138000	127	47300
7	361000	851	828000	228000	261	161000	137000	128	47500
8	341000	810	745000	227000	263	161000	127000	118	40500
9	322000	775	674000	226000	265	161000	129000	113	39500
10	311000	744	625000	222000	256	154000	130000	139	48500

11	311000	722	607000	215000	224	130000	124000	135	45400
12	309000	694	579000	208000	208	117000	122000	126	41400
13	300000	590	478000	220000	306	182000	119000	118	37800
14	288000	518	403000	223000	547	328000	117000	123	38900
15	285000	509	392000	208000	542	304000	119000	130	41600

16	277000	512	383000	191000	518	267000	120000	142	46000
17	268000	510	369000	182000	417	205000	121000	145	47400
18	262000	509	360000	178000	318	153000	122000	145	47800
19	255000	518	357000	173000	251	117000	123000	134	44400
20	251000	524	355000	166000	216	96800	123000	127	42100

21	243000	394	259000	154000	198	82200	121000	132	43000
22	241000	339	220000	151000	177	72000	119000	134	43000
23	238000	327	210000	150000	160	65000	120000	142	45800
24	233000	290	182000	151000	162	66200	117000	145	45800
25	227000	255	156000	155000	158	66300	116000	138	43000

26	229000	253	157000	158000	151	64600	115000	128	39900
27	234000	223	141000	160000	145	62600	113000	120	36500
28	238000	259	166000	161000	142	61300	113000	119	36300
29	243000	254	167000	161000	138	59800	116000	133	41600
30	249000	253	171000	163000	133	58400	133000	148	53000

31	252000	266	181000	157000	124	52500	---	---	---