07020500 DATA: SED_TBL

Station list Available data
LOWER MISSISSIPPI RIVER BASIN

07020500 MISSISSIPPI RIVER AT CHESTER, IL


LOCATION.-- Lat 37°54'13", long 89°50'08" (NAD of 1983), 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 RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1927 to current year. Monthly discharge only for some periods, published in WSP 1311. Since August 1873, results of discharge measurements in reports of the Mississippi River Commission.
	STAGE: July 1942 to current year. Since May 1891, in reports of the Mississippi River Commission and National Weather Service.
SURFACE-WATER QUALITY
	SEDIMENT: August 1980 to current year.

REVISED RECORDS.-- WDR MO-76-1: Drainage area. WDR MO-98-1: Extremes outside period of record.

GAGE.-- Water-stage recorder and U.S. Army Corps of Engineers satellite telemeter. Datum of gage is 341.05 ft above NGVD of 1929 (341.12 ft NAVD 1988). Prior to Feb. 1, 1962, nonrecording gage 0.4 mi downstream at present datum.

REMARKS.-- Natural flow of stream affected by many reservoirs and navigation dams in upper Mississippi River Basin and by many reservoirs and diversions for irrigation in Missouri River Basin.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,000,000 ft³/s, August 7, 1993, gage height, 49.74 ft; minimum discharge, 30,000 ft³/s, December 12, 1937.
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 OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of June 30, 1844, reached a gage height of 39.8 ft, discharge, 1,050,000 ft³/s, computed by the U.S. Army Corps of Engineers.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,540 mg/L, June 17; minimum daily mean, 112 mg/L, July 23.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 1,480,000 tons, Jan. 7; minimum daily, 24,300 tons, Aug. 12.

REMARKS FOR CURRENT YEAR.--Sediment records fair.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005
		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	130000	161	61300	125000	183	61900	272000	528	387000
2	124000	174	58500	154000	302	129000	269000	441	320000
3	123000	197	65200	215000	532	311000	256000	415	287000
4	122000	201	65900	242000	531	346000	242000	447	291000
5	120000	195	63200	235000	483	307000	226000	359	219000

6	118000	189	60500	232000	415	260000	210000	243	138000
7	117000	184	58000	227000	368	226000	224000	242	147000
8	113000	184	56000	218000	323	190000	278000	398	301000
9	113000	184	55900	206000	290	162000	307000	566	470000
10	112000	179	54200	190000	287	147000	299000	522	422000

11	113000	177	54100	188000	329	168000	280000	489	370000
12	115000	186	57500	210000	374	212000	257000	429	298000
13	124000	204	68300	204000	328	181000	238000	384	246000
14	129000	218	75900	191000	253	131000	227000	376	231000
15	123000	202	67000	177000	221	106000	218000	308	182000

16	117000	192	60300	168000	241	109000	210000	248	140000
17	112000	181	54600	155000	167	70100	204000	232	128000
18	105000	169	48100	147000	155	61600	193000	212	110000
19	110000	173	51400	143000	160	61800	186000	208	104000
20	118000	187	59900	142000	167	63800	181000	272	133000

21	113000	182	55500	144000	186	72200	172000	261	122000
22	105000	171	48600	144000	177	69100	164000	244	108000
23	102000	159	43700	138000	193	72100	151000	231	94100
24	103000	154	42600	133000	245	88100	132000	210	75200
25	110000	151	44800	157000	383	163000	120000	204	66800

26	114000	149	46000	187000	386	196000	123000	222	73700
27	120000	147	47600	225000	512	311000	126000	208	70700
28	125000	145	48800	249000	451	303000	126000	208	70700
29	132000	147	52400	277000	469	351000	125000	199	67100
30	134000	177	63900	275000	508	378000	124000	221	74300

31	131000	222	78800	---	---	---	121000	220	71700

TOTAL	3647000	---	1768500	5698000	---	5307700	6261000	---	5818300


	JANUARY			FEBRUARY			MARCH

1	117000	151	47900	209000	237	134000	222000	214	129000
2	117000	156	49400	202000	248	136000	210000	212	120000
3	119000	169	54400	196000	224	119000	208000	189	106000
4	161000	248	113000	189000	181	92500	205000	177	98300
5	284000	744	595000	186000	272	136000	200000	166	89300

6	436000	1210	1430000	185000	223	112000	189000	178	90700
7	489000	1120	1480000	187000	219	110000	181000	219	107000
8	475000	1100	1410000	198000	245	131000	172000	189	87800
9	432000	1020	1190000	215000	211	122000	164000	206	91100
10	398000	781	842000	221000	266	159000	159000	218	93700

11	357000	556	537000	235000	322	204000	167000	230	104000
12	329000	449	399000	244000	376	248000	176000	156	73900
13	347000	481	454000	245000	430	284000	172000	163	75900
14	421000	803	915000	272000	480	353000	164000	164	72500
15	458000	816	1010000	335000	523	475000	159000	164	70500

16	432000	814	950000	384000	858	892000	153000	151	62400
17	394000	809	862000	403000	1060	1150000	148000	126	50600
18	355000	696	670000	393000	1090	1160000	139000	158	59300
19	318000	474	409000	381000	859	884000	136000	188	69100
20	295000	455	362000	369000	713	710000	140000	177	66700

21	285000	459	353000	348000	592	556000	139000	150	56500
22	277000	368	275000	322000	530	461000	133000	146	52200
23	267000	430	310000	302000	406	331000	140000	183	69500
24	251000	363	246000	289000	364	285000	147000	197	78300
25	246000	351	234000	269000	316	230000	142000	209	80200

26	243000	355	232000	251000	278	188000	143000	186	72000
27	233000	352	222000	240000	279	181000	145000	177	69400
28	224000	309	187000	235000	266	169000	144000	196	76100
29	217000	323	190000	---	---	---	139000	174	65700
30	217000	240	141000	---	---	---	140000	164	62000

31	213000	255	147000	---	---	---	148000	159	63600

TOTAL	9407000	---	16316700	7505000	---	10012500	5024000	---	2463300


	APRIL			MAY			JUNE

1	157000	177	75400	242000	458	299000	190000	230	118000
2	163000	193	85400	234000	387	245000	182000	226	111000
3	170000	234	107000	221000	311	185000	176000	198	94400
4	181000	212	103000	209000	313	177000	175000	185	87400
5	194000	230	121000	205000	329	182000	172000	188	87300

6	197000	230	123000	195000	333	175000	169000	186	85100
7	195000	226	119000	179000	271	131000	181000	226	112000
8	194000	240	126000	162000	232	102000	240000	606	403000
9	197000	258	137000	151000	200	81400	278000	1340	1010000
10	200000	276	149000	148000	200	79600	275000	1260	935000

11	203000	294	161000	144000	197	76700	274000	1150	849000
12	211000	345	197000	144000	188	73300	286000	1120	865000
13	227000	453	279000	142000	191	73500	285000	1030	792000
14	253000	561	384000	147000	175	69300	286000	941	728000
15	285000	665	513000	165000	199	89300	317000	1040	893000

16	308000	675	562000	182000	292	144000	341000	1450	1330000
17	317000	648	554000	227000	564	352000	334000	1540	1390000
18	306000	620	513000	269000	1320	957000	307000	1280	1060000
19	288000	581	451000	262000	1470	1040000	284000	934	717000
20	268000	539	391000	247000	1530	1020000	268000	742	538000

21	255000	497	343000	237000	1340	856000	252000	625	425000
22	259000	473	331000	232000	962	603000	243000	526	345000
23	261000	555	390000	231000	717	446000	235000	479	304000
24	275000	647	481000	225000	557	339000	231000	441	274000
25	282000	657	500000	216000	457	266000	225000	402	245000

26	275000	644	478000	216000	413	241000	221000	364	217000
27	274000	631	467000	221000	414	248000	216000	326	190000
28	269000	618	449000	214000	366	211000	209000	287	162000
29	263000	591	420000	205000	363	201000	205000	249	137000
30	252000	526	358000	199000	312	168000	206000	215	120000

31	---	---	---	195000	245	129000	---	---	---

TOTAL	7179000	---	9367800	6266000	---	9260100	7263000	---	14624200


	JULY			AUGUST			SEPTEMBER

1	205000	211	117000	99200	167	44900	129000	210	73000
2	199000	226	121000	99800	187	50400	128000	203	70200
3	194000	285	150000	99700	138	37200	126000	201	68600
4	195000	310	163000	95500	113	29200	111000	182	54700
5	198000	312	167000	86800	120	28100	94100	164	41600

6	196000	246	130000	85600	143	33000	85700	151	34900
7	192000	219	114000	81100	151	33200	83500	143	32200
8	188000	236	120000	82700	144	32200	78900	135	28700
9	186000	213	107000	85600	125	28900	79100	136	29000
10	181000	195	95000	79900	118	25400	86000	149	34500

11	172000	197	91400	77800	116	24500	91000	151	37100
12	161000	185	80700	74600	121	24300	87000	142	33300
13	155000	165	69300	75100	121	24500	81700	131	28800
14	145000	167	65300	85500	119	27600	78600	122	25800
15	138000	161	60200	91900	138	34200	83000	134	30100

16	134000	141	51000	93800	133	33600	86600	147	34400
17	126000	135	46000	94000	158	40200	89300	156	37600
18	114000	146	44800	88300	136	32500	91800	160	39600
19	109000	171	50400	84400	170	38700	91300	150	37100
20	104000	145	40800	88000	140	33200	92400	133	33100

21	98500	134	35600	96800	157	41100	99200	127	34000
22	97900	120	31800	107000	163	47200	106000	144	41500
23	98900	112	29900	109000	162	47900	114000	254	78000
24	93900	132	33400	109000	163	48100	109000	195	57700
25	94100	140	35600	117000	171	54100	106000	139	39500

26	104000	151	42300	118000	176	56300	110000	140	41600
27	109000	119	35100	111000	160	47700	110000	134	39700
28	106000	128	36600	104000	146	40900	108000	117	34100
29	104000	149	41800	115000	170	52800	123000	145	48300
30	108000	170	49500	128000	201	69400	134000	183	63400

31	104000	188	52800	134000	228	82300	---	---	---

TOTAL	4410300	---	2308300	2998100	---	1243600	2993200	---	1282100

YEAR	68651600		79773100