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, 1997-98, and 2002-03.
	BENTHIC MACROINVERTEBRATES: Water years 1997-98 and 2002.
	FISH: Water year 1998 and 2003-04.
	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 this 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, 1,280 mg/L, May 26; minimum daily, 16 mg/L, Jan. 20.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 138,000 tons, May 26; minimum daily, 533 tons, Sep. 30.

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	6140	69	717	6650	74	1300	30900	244	20300
2	5820	73	1150	6970	74	1410	30000	228	18500
3	5030	72	981	7600	75	1530	28600	214	16600
4	4390	71	845	8680	96	2310	e26100	206	14500
5	4770	70	907	11600	160	5220	e18400	199	11600

6	4040	70	759	15800	160	6710	17100	189	8780
7	3150	69	584	17500	156	7340	16300	171	7560
8	3520	68	645	17300	151	7040	15400	154	6400
9	4630	66	830	17300	146	6810	15100	148	6060
10	5720	92	1420	16400	141	6310	e18500	283	17800

11	4470	82	988	15700	136	5780	e27000	726	53400
12	3700	68	685	14300	130	5030	29300	684	54200
13	4020	57	620	e12500	120	3920	30600	568	46900
14	4030	59	646	12000	108	3510	31900	452	39000
15	3960	64	683	12000	93	3000	32800	355	31400

16	4480	68	828	10900	77	2270	32100	324	28100
17	5680	73	1120	11200	61	1840	30500	301	24800
18	6040	77	1260	13900	65	2560	29600	277	22100
19	5860	82	1300	20800	146	8000	28300	253	19300
20	5220	85	1200	e23500	305	21100	27000	229	16700

21	5370	84	1220	27200	517	38100	24400	206	13600
22	5190	83	1160	29300	536	42400	e19500	186	10400
23	4770	81	1050	30800	506	42100	17300	180	8380
24	5430	80	1170	31900	459	39300	18200	175	8590
25	4250	78	895	32200	411	35700	19000	170	8730

26	4180	76	863	32300	363	31600	19000	165	8460
27	4080	75	825	32700	315	27800	19400	160	8400
28	4220	73	835	32600	279	24600	19300	155	8110
29	5260	72	1030	32400	274	24000	18800	149	7550
30	6330	73	1240	31700	259	22200	19000	138	7090

31	5740	73	1130	---	---	---	19300	127	6620

TOTAL	149490	---	29586	585700	---	430790	728700	---	559930


	JANUARY			FEBRUARY			MARCH

1	19400	116	6060	e7400	75	2980	17700	154	7390
2	19700	105	5560	e6500	76	3090	14900	155	6220
3	19700	94	4970	e6900	76	3280	14200	157	6000
4	21600	104	6110	e7200	77	3290	15100	216	8850
5	23200	168	10500	e7500	77	3350	21000	300	17100

6	23700	167	10700	e8000	78	3600	e23900	383	24900
7	22300	162	9750	e8500	78	3900	26500	457	32800
8	21500	156	9040	e9400	79	3980	29200	504	39700
9	21600	150	8780	e10000	79	3920	31400	507	43000
10	22400	145	8770	e8400	80	3910	33000	396	35300

11	22600	139	8500	e9400	81	3850	34200	332	30600
12	22600	131	8010	e10000	82	3630	34700	304	28500
13	22200	116	6970	e12000	82	3650	34600	279	26000
14	21000	101	5710	e9400	83	3180	34200	253	23400
15	19700	85	4520	e11000	84	2770	33300	231	20800

16	19400	69	3620	10100	85	2330	32600	218	19200
17	18600	54	2690	8980	91	2210	31600	206	17600
18	17800	38	1820	9060	98	2390	30600	193	16000
19	17000	22	1020	9890	104	2790	29300	181	14300
20	14800	16	643	11000	111	3290	28200	169	12900

21	13600	66	2430	11700	118	3720	26100	156	11000
22	12600	71	2400	12500	124	4210	e23200	144	8940
23	12400	65	2150	13400	134	4860	20500	141	7810
24	12100	64	2100	15400	154	6410	18900	166	8450
25	12300	66	2200	16700	175	7900	15800	192	8160

26	11500	68	2120	17800	180	8650	14900	218	8760
27	10200	70	1940	18400	156	7750	18600	244	12300
28	e9400	72	2040	18200	153	7510	22100	279	16700
29	e9800	74	2630	18400	153	7640	e25300	331	23100
30	e7000	74	2840	---	---	---	29100	356	27900

31	e6200	75	2870	---	---	---	31900	338	29100

TOTAL	527900	---	149463	323130	---	124040	796600	---	592780


	APRIL			MAY			JUNE

1	34400	336	31300	17200	152	7080	43600	540	63500
2	36500	380	37500	18100	153	7490	44500	392	47100
3	38200	370	38100	18500	153	7660	45600	262	32200
4	39300	238	25300	18500	141	7050	46000	272	33800
5	40000	211	22800	17400	124	5850	46400	226	28400

6	40100	186	20100	16200	109	4780	46900	169	21400
7	39600	156	16700	16100	103	4490	47500	143	18400
8	38700	150	15700	16300	101	4440	47800	131	16900
9	37700	169	17100	15800	96	4090	47700	129	16600
10	36200	173	16900	14000	82	3110	47500	132	16900

11	34600	147	13800	12600	68	2300	47400	166	21200
12	33100	151	13400	13600	65	2390	47500	184	23700
13	31400	139	11800	13600	79	2900	47100	157	20000
14	29300	115	9050	14300	209	8220	46700	151	19000
15	25300	103	7060	16600	453	20400	47500	207	26600

16	e20100	58	3230	e20100	550	32700	49600	358	48000
17	16600	53	2370	e25200	338	23100	50600	244	33400
18	14600	43	1700	27400	366	27000	50700	211	28900
19	12200	56	1840	29200	295	23200	51100	199	27400
20	12200	72	2360	30900	329	27500	51200	143	19800

21	12800	65	2240	32300	461	40200	51200	126	17500
22	13400	86	3110	33000	397	35400	50900	120	16500
23	14500	108	4240	33800	291	26500	50100	112	15200
24	16400	99	4360	34200	308	28500	49100	115	15200
25	17800	117	5650	38500	627	65500	48100	131	17100

26	17500	121	5690	39900	1280	138000	46600	121	15200
27	17400	113	5320	42000	587	66500	45200	118	14400
28	18300	103	5120	42200	446	50900	43500	125	14700
29	18000	129	6310	41400	344	38500	41800	129	14600
30	17000	138	6350	41300	243	27000	40300	135	14700

31	---	---	---	42800	277	32100	---	---	---

TOTAL	773200	---	356500	793000	---	774850	1419700	---	718300


	JULY			AUGUST			SEPTEMBER

1	38400	156	16200	9440	64	1630	24900	387	26100
2	36800	223	22100	9090	74	1800	25200	326	22200
3	35500	227	21800	9820	84	2230	25100	299	20300
4	33600	195	17700	10400	94	2660	24700	275	18400
5	31800	234	20000	10100	105	2860	24200	250	16300

6	29800	277	22200	10300	115	3190	e23100	204	13100
7	26200	303	21500	11400	125	3860	e19700	106	6200
8	e21800	270	15900	11200	134	4060	18000	88	4260
9	19400	230	12100	10800	131	3820	16200	79	3480
10	19300	191	9950	10300	114	3180	12000	71	2290

11	20000	161	8710	9190	106	2630	8490	62	1430
12	21500	163	9470	8720	98	2310	7620	54	1100
13	22700	167	10200	7800	90	1900	7580	50	1020
14	22500	171	10400	7270	82	1620	8070	62	1370
15	22000	175	10400	7230	76	1480	9840	105	2790

16	20900	179	10100	7880	77	1630	8600	99	2310
17	20500	184	10200	7720	78	1620	10200	135	3730
18	19900	184	9880	6870	79	1470	11900	111	3560
19	18600	174	8710	6570	81	1430	10900	97	2870
20	16900	162	7400	7730	82	1710	8250	87	1940

21	14200	151	5780	8200	83	1850	7470	78	1580
22	13400	139	5050	8680	85	1990	6650	72	1300
23	13300	128	4590	8360	87	1960	6680	67	1210
24	14000	116	4380	8700	102	2400	6390	62	1060
25	13900	106	3960	10700	329	10000	6640	56	1010

26	13300	99	3560	20500	343	18500	6600	51	904
27	11900	92	2970	19900	334	17800	6420	45	787
28	9610	86	2230	e21900	495	31200	5850	41	653
29	8710	79	1860	25300	562	38400	5440	41	608
30	9330	73	1830	25000	418	28200	4920	42	533

31	9380	66	1680	24600	407	27000	---	---	---

TOTAL	629130	---	312810	361670	---	226390	367610	---	164395

YEAR	7455830		4439834