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. 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. 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, 1,360 mg/L, March 9; minimum daily mean, 90 mg/L, Feb. 11.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 1,510,000 tons, May 30; minimum daily, 18,400 tons, Oct. 14.

REMARKS FOR CURRENT YEAR.--Sediment records fair.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004
		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	77600	160	32100	69500	123	23100	117000	184	58200
2	79100	176	37600	70800	116	22100	119000	200	64200
3	73400	131	26100	71500	112	21600	108000	193	56400
4	70900	137	26300	73900	113	22600	102000	190	52200
5	71400	158	30600	83000	115	25700	103000	197	54800

6	70500	173	32900	98400	129	34300	98700	198	52800
7	68700	162	30000	112000	119	36200	89700	186	45100
8	66600	126	22700	120000	139	44800	85200	173	39700
9	65900	162	28800	119000	173	55500	84500	159	36300
10	71200	124	23900	114000	145	44900	91500	194	48000

11	82200	139	30800	111000	109	32500	121000	288	96300
12	76900	100	20800	107000	126	36300	179000	457	222000
13	71300	125	24000	105000	126	35700	189000	645	329000
14	68500	99	18400	99500	106	28300	186000	521	262000
15	68700	125	23200	91600	137	34000	169000	389	178000

16	71400	142	27300	86500	156	36300	148000	316	127000
17	74700	145	29300	84400	171	39100	140000	250	94300
18	84600	159	36300	110000	248	77600	135000	232	84200
19	86600	135	31600	174000	522	246000	138000	266	98900
20	81100	105	23100	180000	415	202000	139000	290	109000

21	71900	108	20900	174000	232	109000	130000	242	85300
22	68900	108	20200	168000	194	88300	121000	165	53900
23	73800	109	21700	159000	180	77100	117000	154	48800
24	74900	95	19300	157000	163	69300	130000	161	56600
25	76900	113	23400	150000	157	63500	150000	205	83400

26	77000	117	24300	136000	159	58300	159000	292	125000
27	77600	103	21600	134000	189	68400	145000	244	95700
28	76400	132	27300	136000	215	78900	132000	189	67200
29	73600	142	28100	133000	199	71600	131000	207	73400
30	e72500	148	29000	123000	182	60500	136000	253	92800

31	71500	135	26300	---	---	---	128000	179	62300

TOTAL	2296300	---	817900	3551100	---	1843500	4021600	---	2952800


	JANUARY			FEBRUARY			MARCH

1	126000	184	62600	94500	183	46700	135000	134	48400
2	132000	256	91600	95100	185	47500	130000	175	61100
3	136000	315	116000	99200	198	53200	127000	246	84600
4	136000	285	105000	94600	142	36400	144000	235	91100
5	167000	450	204000	89600	122	29500	180000	243	121000

6	185000	683	341000	86900	102	23900	265000	525	379000
7	176000	615	293000	86900	94	22000	e354000	609	568000
8	155000	272	115000	88000	91	21700	414000	1070	1160000
9	137000	194	71800	86300	96	22400	407000	1360	1500000
10	129000	183	63500	82900	92	20700	388000	1160	1210000

11	125000	174	58500	82400	90	19900	359000	979	950000
12	122000	156	51400	83400	104	23400	320000	768	666000
13	117000	126	39700	85200	113	26000	284000	693	532000
14	113000	128	39100	88800	137	32800	267000	603	436000
15	110000	112	33200	89000	147	35400	251000	485	329000

16	108000	120	34700	86000	134	31100	231000	500	312000
17	109000	184	54400	83500	115	25800	219000	347	206000
18	120000	252	81800	80100	175	37700	217000	377	221000
19	124000	269	90100	78500	183	38900	209000	327	185000
20	129000	341	118000	79800	161	34700	209000	300	169000

21	131000	292	104000	84100	180	41000	210000	218	123000
22	130000	295	104000	97600	184	48500	208000	190	106000
23	131000	236	83200	108000	197	57700	200000	197	106000
24	123000	211	70100	120000	253	81900	187000	200	101000
25	117000	207	65400	129000	273	95200	183000	179	88300

26	116000	220	68600	132000	202	71500	178000	162	78100
27	114000	220	67800	148000	161	64500	204000	273	152000
28	109000	192	56400	151000	210	85800	264000	351	251000
29	100000	175	47400	140000	207	78100	304000	374	307000
30	92900	163	40900	---	---	---	304000	405	332000

31	94300	165	42100	---	---	---	299000	375	302000

TOTAL	3914200	---	2814300	2850400	---	1253900	7651000	---	11175600


	APRIL			MAY			JUNE

1	311000	390	328000	215000	276	161000	426000	1130	1300000
2	316000	442	378000	226000	293	179000	411000	1080	1200000
3	315000	461	393000	235000	246	156000	415000	1050	1180000
4	306000	379	313000	235000	243	154000	437000	1170	1380000
5	294000	342	271000	232000	196	123000	445000	1100	1320000

6	284000	344	264000	218000	184	109000	442000	1090	1300000
7	277000	310	231000	206000	169	94200	431000	834	971000
8	274000	293	217000	189000	151	76900	417000	554	624000
9	270000	280	204000	179000	177	85500	403000	550	599000
10	263000	266	189000	167000	146	66000	393000	452	480000

11	255000	219	151000	156000	158	66400	387000	428	446000
12	244000	235	155000	146000	144	56900	378000	440	450000
13	229000	235	145000	139000	135	50600	371000	373	374000
14	215000	236	137000	153000	151	63100	371000	355	356000
15	202000	231	126000	177000	252	120000	368000	367	365000

16	184000	214	106000	181000	199	97200	367000	365	362000
17	162000	164	71900	178000	157	75200	381000	464	478000
18	156000	136	57200	176000	152	72300	403000	714	778000
19	150000	138	56100	178000	160	77300	422000	811	923000
20	148000	146	58200	196000	170	90000	422000	807	920000

21	143000	113	43500	229000	231	143000	416000	738	830000
22	147000	120	47600	247000	348	233000	410000	668	740000
23	148000	118	47200	273000	592	438000	402000	571	620000
24	152000	135	55100	277000	569	426000	397000	580	622000
25	159000	149	64000	264000	529	377000	395000	526	560000

26	168000	182	82400	288000	504	392000	393000	502	533000
27	180000	191	92400	343000	586	545000	388000	505	530000
28	185000	180	89900	408000	860	951000	382000	428	441000
29	189000	206	106000	449000	1160	1410000	374000	366	369000
30	206000	225	125000	455000	1230	1510000	363000	381	374000

31	---	---	---	445000	1240	1490000	---	---	---

TOTAL	6532000	---	4604500	7460000	---	9888600	12010000	---	21425000


	JULY			AUGUST			SEPTEMBER

1	352000	369	350000	194000	305	160000	302000	1100	897000
2	340000	343	315000	189000	261	133000	269000	1080	787000
3	327000	309	273000	173000	265	124000	237000	939	602000
4	313000	326	276000	160000	217	93500	218000	685	404000
5	297000	317	254000	159000	194	83300	196000	514	273000

6	287000	329	255000	167000	188	84900	171000	411	190000
7	269000	318	232000	185000	210	105000	152000	290	120000
8	254000	281	193000	192000	234	121000	141000	214	81400
9	257000	305	211000	178000	266	128000	130000	186	65300
10	257000	375	260000	165000	306	136000	123000	169	56400

11	254000	336	230000	158000	274	117000	123000	157	52000
12	250000	317	214000	145000	237	93200	119000	140	44900
13	248000	293	196000	138000	180	67400	114000	138	42400
14	249000	253	170000	133000	175	62900	109000	142	41700
15	257000	243	169000	123000	190	63400	106000	132	37600

16	269000	298	217000	114000	170	52200	107000	146	42200
17	270000	404	295000	107000	175	50800	113000	159	48400
18	258000	409	285000	109000	165	48300	122000	132	43400
19	243000	437	286000	108000	154	44900	125000	119	40300
20	234000	399	252000	104000	146	41000	128000	134	46300

21	236000	401	255000	106000	157	44900	125000	128	43300
22	232000	421	264000	114000	152	47000	121000	125	40800
23	224000	416	251000	114000	121	37500	124000	123	41300
24	213000	377	217000	110000	113	33500	142000	143	54900
25	208000	356	200000	99900	140	37800	154000	189	78800

26	202000	283	154000	113000	198	61000	157000	187	79200
27	194000	245	128000	165000	272	123000	153000	178	73900
28	187000	231	117000	212000	480	278000	147000	157	62200
29	188000	243	123000	295000	580	463000	143000	175	67400
30	189000	311	159000	313000	746	631000	135000	197	68900

31	198000	353	188000	305000	822	676000	---	---	---

TOTAL	7756000	---	6989000	4947900	---	4242500	4506000	---	4526000

YEAR	67496500		72533600

e Estimated