07020500 DATA: SED_TBL

Station list Available data
LOWER MISSISSIPPI RIVER BASIN

07020500 MISSISSIPPI RIVER AT CHESTER, IL


LOCATION.-- Lat 37°54'10", long 89°50'10" (NAD of 1927), 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 in reports of the U.S. Geological Survey. 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 in reports of the U.S. Geological Survey. 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. 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, 842 mg/L, May 13; minimum daily mean, 90 mg/L, Jan. 21.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 969,000 tons, May 13; minimum daily, 13,700 tons, Jan. 16.

REMARKS FOR CURRENT YEAR.--Sediment records fair except those for estimated daily loads, which are poor.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
		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	96400	---	e20300	139000	---	e45400	95000	---	e25800
2	98300	---	e22300	133000	---	e41700	95200	---	e25600
3	102000	---	e23700	127000	---	e37500	96300	---	e26100
4	109000	---	e27500	125000	---	e34700	93100	---	e24700
5	112000	---	e28600	125000	---	e32400	93100	---	e24900

6	125000	---	e42700	125000	---	e31300	85600	---	e22500
7	126000	---	e44300	127000	97	33300	76300	---	e19400
8	131000	---	e40900	124000	---	e33200	75600	---	e18500
9	132000	---	e39500	123000	---	e33700	76300	---	e18800
10	132000	---	e38300	119000	---	e32300	76900	---	e19100

11	129000	---	e36400	111000	---	e29200	78800	91	19400
12	136000	---	e38800	108000	---	e28000	79400	---	e19500
13	143000	---	e43700	107000	---	e27400	79300	---	e19600
14	153000	---	e55900	107000	---	e27300	80100	---	e20000
15	150000	---	e55200	107000	---	e27800	84000	---	e22100

16	149000	---	e51000	109000	---	e30000	86900	---	e23500
17	157000	137	58000	107000	---	e29100	85000	---	e21900
18	158000	---	e55100	107000	---	e28200	85700	---	e22000
19	160000	---	e57400	106000	---	e27600	95300	---	e28300
20	166000	---	e62200	107000	---	e29200	109000	---	e43300

21	163000	---	e57700	102000	---	e29200	107000	---	e39500
22	160000	---	e53100	99700	104	28000	104000	---	e36600
23	157000	---	e49200	99900	---	e28300	99500	---	e34200
24	153000	---	e46400	98400	---	e27400	96900	---	e32500
25	150000	---	e47000	101000	---	e28900	94300	---	e31000

26	153000	---	e50400	99400	---	e28000	92000	---	e29400
27	145000	---	e44400	97500	---	e26800	83700	---	e24600
28	132000	---	e36000	98800	---	e27700	76400	---	e21200
29	131000	---	e35800	97300	---	e26900	71700	---	e19700
30	142000	---	e47900	94600	---	e25100	71300	---	e19700

31	141000	---	e47200	---	---	---	76200	---	e21800

TOTAL	4291700	---	1356900	3331600	---	915600	2699900	---	775200


	JANUARY			FEBRUARY			MARCH

1	85400	---	e26400	60500	---	e17100	82300	133	29700
2	93500	---	e29900	62200	---	e18700	83500	144	32400
3	95500	---	e29800	63700	---	e20300	84900	144	33100
4	91500	---	e27800	65500	124	22000	85300	138	31800
5	86500	---	e25700	66200	130	23300	84200	138	31400

6	83600	---	e24200	64500	---	21700	82100	138	30500
7	82600	---	e23100	62800	---	20000	80900	132	28900
8	80200	---	e21600	66200	133	23900	80500	127	27500
9	79000	---	e20800	66000	---	23000	81000	124	27200
10	78200	---	e20200	67700	---	22000	79800	119	25700

11	78000	---	e19800	67700	113	20700	75000	115	23300
12	75800	---	e19000	67300	111	20100	70500	109	20700
13	72100	---	e17800	64200	109	18900	70400	107	20300
14	67200	---	e16400	63100	107	18300	75600	149	30500
15	60700	---	e14600	64300	98	16900	88900	204	48900

16	57200	---	e13700	70500	---	18300	105000	208	58900
17	58000	---	e14000	79000	---	22000	107000	206	59500
18	64600	---	e16500	81300	134	29400	105000	208	59000
19	67500	---	e16900	80400	194	42200	109000	212	62100
20	65500	---	e15900	89900	239	57900	116000	217	68100

21	62500	90	15100	92300	270	67300	148000	---	e97400
22	61200	---	e14900	97000	237	61800	170000	---	e107000
23	59800	---	e14700	101000	151	41500	162000	---	e93600
24	59800	---	e15700	97000	---	37100	148000	---	e78000
25	61300	101	16700	91500	---	34800	141000	---	e72300

26	62800	---	e17000	89400	---	33800	141000	175	66500
27	63000	---	e17200	86800	137	32200	135000	163	59400
28	61600	---	e16500	84200	131	29900	129000	161	56300
29	61500	---	e16200	---	---	---	136000	166	61800
30	60500	---	e16100	---	---	---	141000	163	62700

31	59900	---	e16100	---	---	---	140000	129	48700

TOTAL	2196500	---	590300	2112200	---	815100	3337900	---	1553200


	APRIL			MAY			JUNE

1	133000	---	e43900	239000	250	162000	270000	204	149000
2	131000	---	e41200	242000	207	135000	254000	206	141000
3	126000	---	e37600	245000	226	149000	243000	266	175000
4	124000	---	e35000	253000	235	161000	228000	206	127000
5	121000	100	32500	287000	250	194000	214000	169	98100

6	125000	104	34900	329000	328	293000	204000	147	81000
7	130000	122	e42900	367000	672	668000	195000	174	91300
8	135000	138	50300	371000	704	706000	194000	172	89700
9	134000	---	e50400	378000	580	592000	186000	212	106000
10	136000	---	e50800	378000	501	511000	173000	254	118000

11	135000	---	e50200	392000	500	530000	192000	315	163000
12	132000	---	e47500	416000	765	861000	230000	372	231000
13	130000	---	e44300	426000	842	969000	253000	475	323000
14	128000	---	e41300	411000	750	833000	294000	299	237000
15	121000	---	e36400	381000	666	686000	290000	321	252000

16	116000	---	e31400	349000	588	555000	265000	334	239000
17	115000	---	e29300	325000	478	419000	242000	267	175000
18	118000	---	e29100	314000	432	367000	228000	235	145000
19	119000	---	e28500	308000	386	321000	221000	299	178000
20	120000	---	e28400	302000	322	263000	214000	295	171000

21	124000	---	e29500	296000	341	272000	203000	308	168000
22	125000	88	29800	292000	308	242000	190000	279	143000
23	131000	93	32800	292000	272	215000	178000	278	134000
24	143000	103	40100	293000	248	196000	166000	264	119000
25	167000	156	71300	304000	260	213000	159000	216	92700

26	200000	227	122000	316000	247	211000	169000	224	103000
27	219000	216	128000	310000	256	215000	201000	411	224000
28	233000	191	120000	303000	349	285000	207000	280	156000
29	233000	197	124000	296000	314	251000	194000	261	137000
30	233000	202	127000	289000	308	241000	176000	278	132000

31	---	---	---	283000	281	215000	---	---	---

TOTAL	4337000	---	1610400	9987000	---	11931000	6433000	---	4698800


	JULY			AUGUST			SEPTEMBER

1	167000	225	101000	143000	126	48800	72600	109	21400
2	167000	200	90200	139000	118	44000	105000	217	63000
3	167000	186	83900	131000	120	42500	134000	256	92800
4	176000	138	65700	124000	119	39900	120000	212	69000
5	181000	222	108000	120000	117	38100	132000	140	49800

6	179000	317	153000	117000	116	36600	129000	152	52700
7	178000	285	137000	118000	112	35900	110000	143	42700
8	175000	274	130000	112000	120	36200	95500	137	35400
9	176000	215	102000	110000	180	53800	87200	139	32900
10	187000	151	76300	106000	144	41100	81000	138	30200

11	216000	256	149000	101000	136	37000	75700	151	30900
12	231000	344	214000	97000	136	35600	73900	141	28200
13	235000	325	206000	94000	141	35900	75300	145	29600
14	233000	297	187000	90800	147	36100	75400	126	25600
15	232000	265	166000	89400	126	30300	80200	131	28500

16	229000	225	139000	88100	116	27500	95700	171	44200
17	222000	217	130000	86200	118	27600	109000	151	44700
18	221000	273	163000	83200	140	31500	107000	138	39800
19	229000	319	198000	79900	143	30800	95300	131	33800
20	237000	268	172000	78900	102	21700	85000	143	32900

21	228000	251	155000	76700	124	25600	84600	157	35900
22	211000	225	128000	73900	119	23700	89900	132	32100
23	197000	207	110000	73200	91	18000	93100	131	32900
24	193000	144	75200	75300	100	20500	95900	150	38900
25	191000	122	63100	79100	131	28000	94400	189	48200

26	183000	120	59000	78700	108	23000	96200	164	42600
27	177000	117	56000	76000	100	20600	93100	135	34000
28	169000	114	52000	73400	101	20100	91400	152	37600
29	160000	111	48000	73500	134	26600	86300	170	39500
30	157000	111	47100	78700	113	24100	79300	137	29400

31	152000	116	47700	74500	94	18900	---	---	---

TOTAL	6056000	---	3612200	2941500	---	980000	2843000	---	1199200

YEAR	50567300		30037900

e Estimated