05586100 DATA: SED_TBL

Station list Available data
ILLINOIS RIVER BASIN

05586100 ILLINOIS RIVER AT VALLEY CITY, IL


LOCATION.-- Lat 39°42'12", long 90°38'43" (NAD of 1927), in SE1/4NW1/4 sec.34, T.15 N., R.14 W., Scott County, Hydrologic Unit 07130011, on upstream side of Norfolk & Southern Corporation Railroad bridge at Flints Creek, 0.4 mi east of Valley City, 1.8 mi downstream from Mauvaise Terre Creek, and at mile 61.3. Auxiliary gage 10.0 miles upstream.

DRAINAGE AREA.-- 26,743 mi², does not include diversion from Lake Michigan through the Chicago Sanitary and Ship Canal, which has occurred since Jan. 17, 1900.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1938 to current year. Prior to October 1960, at site 0.2 mi upstream at same datum. Prior to October 1989, published as "at Meredosia." Records are considered equivalent.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1975-93 and 1996 to current year.
	SEDIMENT: February 1980 to current year.
	SPECIFIC CONDUCTANCE: Water years 1975-81.
	WATER TEMPERATURE: Water years 1975-81.
	MISCELLANEOUS: Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996; sediment concentration and particle size, water years 1996-2003.
BIOLOGICAL
	ALGAE: Water years 1980-81.
	BENTHIC MACROINVERTEBRATES: Water years 1997-98, and 2002.
	FISH: Water year 1998, and 2003.
	HABITAT: Water years 1997-98, and 2003.

GAGE.-- U.S. Army Corps of Engineer's water-stage recorder and satellite telemeter, crest-stage gage, and water-quality monitor. Datum of gage is 418.00 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Nov. 25, 1992 and Oct. 1, 1994 to current; auxiliary gage (05585500) at site 10.0 mi upstream. Nov. 25, 1992 to Sept. 30, 1994; auxiliary gage operated at the Valley City site (05586100).

REMARKS.-- Occasional regulation at low flow by navigation dam at La Grange. Since Jan. 17, 1900, flow has included diversion from Lake Michigan through Chicago Sanitary and Ship Canal. Suspended-sediment samples were collected by a local observer twice weekly with additional samples collected during high runoff periods. Since February 1994, samples used to compute sediment record have been collected at upstream side Rt. 106 bridge at Florence at mile 56.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 123,000 ft³/s, May 26-28, 1943; maximum gage height, 28.61 ft, May 26, 1943; minimum daily discharge, 1,330 ft³/s, Sept. 2, 1984.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,720 mg/L, Apr. 14, 1981; minimum daily, 14 mg/L, Dec. 26, 1984, July 21, 1993.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 410,000 tons, June 4, 1980; minimum daily, 172 tons, Sept. 2, 1984.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 1,040 mg/L, May 12; minimum daily, 29 mg/L, Nov. 20.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 102,000 tons, May 18; minimum daily, 344 tons, Nov. 20.

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	5400	55	770	5030	78	1070	4830	72	945
2	5940	63	1000	5370	85	1230	5370	71	1040
3	6040	58	950	5540	96	1440	4740	63	806
4	5840	61	975	5210	62	869	5690	74	1140
5	5660	80	1230	5080	46	645	4080	58	642

6	6850	94	1750	5560	84	1270	5380	80	1170
7	6420	76	1320	5460	72	1080	5640	79	1200
8	8190	100	2210	6300	86	1470	4670	66	832
9	7700	75	1580	6020	72	1190	4620	102	1270
10	6860	60	1110	4850	41	547	4760	122	1570

11	7180	77	1480	4620	36	453	4580	79	977
12	6680	65	1180	5030	50	695	4860	87	1140
13	5710	55	849	5230	68	964	4530	81	996
14	6090	83	1370	4550	37	465	5660	103	1580
15	5730	45	709	4630	83	1060	6330	106	1820

16	5800	76	1200	4590	37	459	5880	114	1820
17	5570	42	635	5320	81	1160	6040	108	1760
18	6370	67	1190	5820	96	1530	8290	173	3960
19	5920	50	811	5090	42	589	8230	172	3830
20	5490	43	642	4370	29	344	7680	150	3100

21	5310	40	579	4700	56	718	8300	166	3720
22	5480	42	621	4470	54	649	8970	192	4660
23	5590	45	687	5190	69	965	9250	209	5220
24	5650	39	606	4810	47	610	9200	208	5170
25	5610	47	722	4690	48	615	9650	219	5720

26	4860	39	510	4990	58	778	9160	168	4170
27	5030	39	532	5130	58	803	7960	117	2520
28	5280	32	462	5040	58	783	7320	92	1820
29	5470	32	469	4910	61	813	6260	76	1280
30	5620	91	1380	3800	61	623	6740	76	1390

31	5160	58	816	---	---	---	6230	77	1310

TOTAL	184500	---	30345	151400	---	25887	200900	---	68578


	JANUARY			FEBRUARY			MARCH

1	7010	144	2720	e5300	53	756	7360	61	1210
2	8140	206	4560	e6000	46	748	7640	63	1300
3	8570	201	4660	e5800	43	669	7880	65	1390
4	7890	190	4050	e5700	48	735	7330	62	1240
5	7820	182	3830	e7400	92	1830	7090	59	1130

6	7640	181	3730	e7000	92	1740	7520	69	1410
7	7850	179	3810	e6600	76	1350	7860	76	1610
8	6620	117	2110	e6300	67	1140	7360	64	1280
9	5780	58	913	6100	64	1050	6510	61	1070
10	6090	138	2290	5860	65	1040	6810	67	1230

11	6460	153	2680	5790	67	1050	7530	83	1690
12	7140	177	3420	5420	70	1030	8290	107	2390
13	6200	127	2150	6620	84	1510	8810	123	2930
14	5230	62	886	7480	99	2010	9390	138	3540
15	5680	116	1780	9650	134	3500	10100	147	4010

16	5790	127	2000	9160	111	2760	10800	166	4880
17	e6000	152	2460	8020	81	1750	11000	158	4690
18	e5400	60	877	7900	77	1640	10500	85	2410
19	e5600	212	3210	7800	89	1870	12100	143	4790
20	e5800	173	2710	9040	113	2770	15800	293	12500

21	e6000	107	1740	9750	132	3480	15400	180	7540
22	e5700	97	1490	9760	120	3170	12700	151	5170
23	e5100	94	1300	9240	95	2380	12200	137	4510
24	e5200	91	1280	8300	70	1590	12400	144	4820
25	e5300	88	1260	7770	58	1230	11800	136	4340

26	e5200	85	1200	7480	57	1150	11700	131	4140
27	e5100	82	1130	7160	57	1100	12300	145	4860
28	e4700	79	1000	7120	56	1080	11900	129	4160
29	e5000	73	984	---	---	---	11000	98	2920
30	e5200	66	931	---	---	---	11500	100	3100

31	e4700	60	759	---	---	---	11600	100	3140

TOTAL	189910	---	67920	205520	---	46128	312180	---	105400


	APRIL			MAY			JUNE

1	11100	102	3080	11100	68	2030	19100	179	9250
2	10900	102	3060	13300	91	3300	17400	165	7740
3	10900	101	2990	16400	132	5870	17000	152	7000
4	10800	100	2910	19800	175	9390	17400	146	6870
5	13800	177	6710	e24500	291	19200	17400	147	6930

6	15700	289	12300	e26900	482	34900	17600	174	8260
7	17100	262	12100	e28000	366	27600	17800	172	8260
8	18900	276	14300	e28900	477	37200	16600	157	7010
9	20300	340	18600	e29900	761	61400	15000	142	5730
10	20700	318	17800	e30800	682	56700	14700	136	5410

11	20900	299	16900	e32000	570	49200	15300	186	7690
12	20700	292	16300	32500	1040	91100	16500	140	6240
13	20500	279	15400	35100	837	79200	19000	147	7590
14	19500	238	12600	37700	753	76400	21900	194	11400
15	17700	196	9370	39400	641	68200	21500	236	13700

16	15100	162	6630	40500	597	65300	21000	247	14000
17	15300	202	8400	41200	835	92900	20300	241	13200
18	17100	274	12700	41600	909	102000	20000	233	12600
19	17300	229	10700	41400	760	85000	19800	226	12100
20	14700	152	6070	40900	505	55800	19700	217	11500

21	11300	99	3050	39600	296	31600	19600	202	10700
22	10800	89	2610	38200	290	29900	19000	187	9600
23	11300	87	2650	36900	292	29100	17900	170	8200
24	12200	110	3680	35600	294	28200	15100	146	5940
25	13300	149	5400	34000	293	26900	12600	122	4160

26	15700	295	12500	32500	261	22900	13500	126	4600
27	14000	214	8150	30700	229	19000	13700	105	3900
28	11700	134	4250	28900	220	17100	13100	101	3590
29	10600	88	2540	e26000	212	14900	12500	100	3380
30	11000	81	2400	e23200	203	12800	11700	108	3410

31	---	---	---	20500	193	10700	---	---	---

TOTAL	450900	---	256150	958000	---	1265790	513700	---	239960


	JULY			AUGUST			SEPTEMBER

1	10500	128	3660	31600	258	22000	17400	375	17800
2	10100	89	2420	30200	263	21400	18400	355	17900
3	11400	94	2900	29000	267	20900	14600	214	8500
4	11000	73	2180	28000	272	20600	12400	162	5410
5	10300	72	2000	26800	271	19600	10900	126	3710

6	9630	71	1850	25700	254	17700	9790	125	3300
7	8840	71	1690	24400	236	15400	9960	151	4060
8	9450	81	2080	22100	217	13000	9920	159	4270
9	13500	109	4040	18300	197	9750	9540	158	4070
10	21700	239	14600	15500	176	7350	8140	146	3220

11	28400	379	29100	13700	156	5770	7500	131	2670
12	30400	491	40300	12700	139	4790	6240	96	1630
13	32900	552	49000	12500	123	4140	4650	67	842
14	34200	485	44800	12600	107	3630	4730	63	801
15	34400	419	38900	11900	93	2990	5610	73	1100

16	34100	313	28800	10400	85	2390	5560	76	1140
17	33800	308	28100	9610	77	2000	5340	71	1010
18	36000	480	47000	8510	94	2170	4120	66	731
19	38200	584	60200	8480	83	1890	4620	72	907
20	38100	377	38800	8270	75	1680	6820	99	1830

21	37100	320	32000	7510	68	1370	7080	101	1930
22	36400	322	31700	7050	60	1130	6580	93	1670
23	36300	326	31900	7360	61	1210	5000	77	1040
24	36200	319	31200	6830	55	1020	5100	74	1020
25	36200	320	31300	7180	63	1220	4940	74	994

26	36100	340	33200	7350	65	1300	4710	71	909
27	35600	240	23100	6760	39	720	4700	69	883
28	35400	239	22900	6650	47	847	5260	70	990
29	34900	244	23000	5200	45	632	5060	64	872
30	33900	248	22700	5880	79	1260	5410	66	925

31	32800	253	22400	6760	116	2260	---	---	---

TOTAL	847820	---	747820	434800	---	212119	230080	---	96134

YEAR	4679710		3162231