05586100 DATA: Sediment Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05586100 ILLINOIS RIVER AT VALLEY CITY, IL

LOCATION.-- Lat 39°42'12", long 90°38'43", 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.

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 1995-2001.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1975-93 and 1996 to current.

SEDIMENT: Water years 1980 to current.

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.

BIOLOGICAL

ALGAE: Water years 1980-81.

BENTHIC MACROINVERTEBRATES: Water years 1997-98.

FISH: Water year 1998.

HABITAT: Water years 1997 and 1998.

GAGE.-- U.S. Army Corps of Engineer's water-stage recorder, satellite telemeter and rain gage, crest-stage gage, and water-quality monitor. Datum of gage is 418.00 ft above sea level (levels by U.S. Army Corps of Engineers).

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, 1,300 mg/L, June 6; minimum daily, 36 mg/L, May 16.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 140,000 tons, June 6; minimum daily, 925 tons, Nov. 1.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
		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	11300	102	3090	8910	38	925	13600	98	3540
2	10100	107	2910	8200	43	949	13300	90	3260
3	9090	107	2630	7450	47	955	13500	88	3210
4	11200	119	3610	8280	53	1190	12900	87	3030
5	13700	108	4020	9120	63	1560	11000	85	2520

6	14000	111	4200	10700	61	1740	11000	78	2300
7	14500	115	4510	9650	52	1360	10700	70	2020
8	14600	131	5130	9230	57	1420	9790	66	1740
9	14400	134	5190	11200	62	1880	10200	72	1970
10	14100	126	4800	14600	68	2670	10200	78	2150

11	13100	79	2810	17500	98	4650	10600	84	2410
12	13500	92	3350	18900	174	8890	9880	91	2410
13	12700	73	2490	19900	177	9520	e9500	97	2480
14	11300	61	1880	20100	174	9480	e8500	101	2330
15	11300	62	1880	20500	171	9500	e7000	98	1850

16	12000	69	2250	20500	168	9320	e6200	93	1560
17	11700	75	2370	20100	170	9210	e7200	88	1710
18	11200	85	2580	20300	184	10100	e7500	83	1670
19	9810	98	2590	20000	198	10700	e7400	73	1460
20	9440	111	2820	18500	213	10800	e7000	64	1210

21	8900	97	2350	17800	222	10700	e6400	54	937
22	8930	48	1150	16500	210	9370	e7200	49	952
23	9560	64	1650	14700	196	7760	e8000	55	1180
24	9700	37	960	12400	182	6320	e8800	61	1450
25	9310	46	1190	12300	168	5560	e9600	67	1720

26	8720	67	1570	12800	154	5260	e9500	68	1740
27	9020	69	1670	12200	140	4600	e9200	69	1710
28	9440	57	1440	12100	127	4150	e8300	70	1560
29	10500	46	1290	11900	117	3760	e7700	70	1470
30	10500	45	1260	12600	107	3670	e7400	71	1430

31	10200	42	1150	---	---	---	e7200	72	1400

TOTAL	347820	---	80790	428940	---	167969	286270	---	60379


	JANUARY			FEBRUARY			MARCH

1	e7100	73	1400	32400	592	51600	70200	217	41100
2	e7100	74	1420	37500	512	51700	72500	268	52400
3	e7100	75	1430	39800	436	46800	73000	154	30300
4	e7100	76	1450	41000	360	39800	73300	149	29500
5	e7000	76	1440	41000	290	32100	72500	226	44200

6	e7000	77	1460	41100	256	28300	71100	187	35900
7	e7000	78	1480	40500	270	29500	69300	153	28700
8	e6900	79	1470	39800	323	34600	66800	126	22800
9	e6900	80	1490	42600	519	59900	63800	109	18800
10	e6800	81	1480	45200	731	89300	61100	115	18900

11	e6900	81	1520	47100	815	104000	58600	108	17000
12	e7100	82	1580	50200	576	78000	56400	100	15300
13	e7300	83	1640	53500	454	65500	54000	113	16500
14	e7600	88	1810	57500	414	64200	51900	185	26000
15	e8200	107	2370	60600	360	58900	50400	261	35500

16	e9000	125	3040	62600	291	49200	49900	324	43700
17	e10000	137	3690	62900	227	38600	50200	307	41700
18	e11400	148	4540	63200	182	31200	49600	191	25500
19	e12500	159	5350	62900	154	26200	48600	161	21100
20	e14000	152	5740	61900	157	26300	48300	138	18000

21	e15200	76	3110	60800	160	26300	48200	111	14400
22	e17600	60	2830	59500	163	26100	47900	97	12500
23	e17000	59	2710	57900	165	25800	47500	94	12100
24	16500	59	2600	57000	168	25900	46800	92	11600
25	13200	58	2070	59400	227	36500	45700	90	11000

26	12600	57	1950	61200	345	57000	44500	87	10400
27	10300	77	2150	63200	186	31800	43200	87	10100
28	10500	245	6950	66600	181	32600	42000	93	10500
29	16900	771	35000	---	---	---	40700	100	11000
30	28700	1090	83400	---	---	---	39500	103	11000

31	29000	754	59100	---	---	---	38400	96	9970

TOTAL	351500	---	247670	1468900	---	1267700	1695900	---	707470


	APRIL			MAY			JUNE

1	36900	89	8870	25500	80	5530	27500	373	27700
2	35500	85	8170	23400	78	4920	28600	404	31200
3	34200	93	8590	20600	64	3560	29300	356	28100
4	32600	108	9510	18900	67	3440	e31000	458	38300
5	31200	141	11900	18600	63	3180	e34000	696	63800

6	29600	176	14000	e18200	68	3320	e40000	1300	140000
7	27700	211	15800	e18000	73	3550	e46000	942	116000
8	24900	250	16800	e17600	67	3160	e49000	736	97300
9	21900	262	15700	e17200	55	2580	e51000	610	83900
10	23800	205	13700	e17200	46	2120	e52000	483	67800

11	28100	224	17000	e17600	37	1770	e53000	384	54900
12	32000	267	23100	e17800	46	2220	e54000	362	52800
13	34000	306	28100	e18000	51	2460	e54000	354	51700
14	35500	335	32100	e18300	41	2040	54100	390	56900
15	36300	370	36300	e19000	37	1910	53500	454	65600

16	36000	324	31500	e19800	36	1900	52600	348	49400
17	35600	251	24200	e21000	45	2550	51800	241	33700
18	35200	179	17000	e22600	71	4340	49900	205	27600
19	34400	138	12800	e24500	105	6900	47600	197	25300
20	33700	151	13700	e26500	124	8890	45400	206	25200

21	32800	120	10600	e28000	108	8150	43900	270	31900
22	31900	120	10300	e27500	123	9160	42300	443	50600
23	32000	122	10600	e26500	137	9810	40700	372	40900
24	31200	125	10500	e25500	167	11500	38600	259	27100
25	30500	127	10500	e24000	187	12100	36500	234	23100

26	29400	126	10000	21700	207	12100	34400	240	22300
27	28900	126	9870	21200	177	10100	32400	253	22200
28	28100	137	10400	21300	186	10700	30400	244	20000
29	27200	100	7350	21700	208	12200	28900	272	21200
30	26700	88	6310	23500	243	15500	24900	282	19000

31	---	---	---	25800	295	20600	---	---	---

TOTAL	937800	---	455270	667000	---	202260	1257300	---	1415500


	JULY			AUGUST			SEPTEMBER

1	21300	230	13400	11200	124	3760	10700	185	5350
2	19800	175	9370	9860	125	3320	10600	173	4980
3	17200	140	6520	9920	129	3450	10600	162	4660
4	15800	163	6920	10800	142	4160	9530	152	3910
5	15000	189	7650	12200	156	5160	9860	146	3900

6	16200	205	8950	12900	163	5650	10200	131	3610
7	16300	193	8500	12100	148	4840	8430	143	3240
8	15500	178	7440	10200	131	3600	7010	142	2680
9	14900	164	6580	9370	114	2900	7400	139	2780
10	14800	152	6060	8220	101	2240	8860	137	3270

11	14700	147	5820	8320	97	2180	9820	136	3610
12	14300	143	5520	8290	93	2090	10200	142	3910
13	13900	138	5200	8330	90	2020	9810	148	3910
14	12900	134	4670	7870	88	1880	9700	147	3840
15	11900	130	4200	6920	94	1760	9720	126	3310

16	10200	130	3560	6720	100	1810	9020	104	2530
17	8600	129	3000	6230	106	1770	7560	82	1680
18	8880	129	3080	6360	107	1840	6910	68	1280
19	8910	128	3080	5950	98	1570	8080	77	1680
20	9530	128	3280	6160	88	1460	8270	116	2720

21	8860	127	3040	7460	75	1490	12500	273	9250
22	8620	126	2940	7090	54	1040	13800	303	11300
23	8480	122	2800	14700	243	10700	14200	320	12200
24	8360	108	2440	19200	600	31100	14600	299	11800
25	9210	99	2470	18000	509	24800	15700	271	11500

26	11400	109	3340	17000	384	17600	15800	248	10500
27	13400	116	4200	16900	341	15600	15300	242	10000
28	14100	122	4650	15600	303	12800	14100	235	8950
29	13000	123	4330	13900	266	10000	12800	219	7580
30	12000	123	3990	13900	229	8630	11600	194	6070

31	11800	124	3950	13000	198	6940	---	---	---

TOTAL	399850	---	160950	334670	---	198160	322680	---	166000

YEAR	8498630		5130118

e Estimated