05586100 DATA: Sediment Tables, 2000

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 1994-2000.

SURFACE-WATER QUALITY

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

SEDIMENT: Water years 1980-99.

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, September 1997, September 1998; fish, August 1998.

GAGE.-- U.S. Army Corps of Engineers water-stage recorder, satellite telemeter and rain gage. 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, 820 mg/L, July 6; minimum daily, 16 mg/L, Dec. 2-4.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 93,400 tons, July 6; minimum daily, 249 tons, Dec. 4.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
		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	13200	89	3120	5350	50	721	7340	17	338
2	10700	161	4600	4380	50	596	7170	16	314
3	9700	145	3810	5760	50	775	6800	16	286
4	9610	127	3290	5840	49	771	5910	16	249
5	9890	112	2980	5440	48	711	7000	26	520

6	9900	101	2690	5490	49	727	10200	53	1480
7	9870	91	2420	5480	52	771	11900	82	2640
8	8880	82	1960	5110	56	771	10900	68	1990
9	5110	73	1010	5390	58	846	9570	63	1630
10	5490	64	945	5440	55	809	9380	93	2390

11	6180	55	920	5150	52	727	10300	247	6900
12	7220	103	2080	5750	49	767	9700	243	6350
13	7200	124	2410	5470	47	690	7840	208	4430
14	8080	100	2180	5070	44	605	6510	83	1470
15	7520	80	1640	5270	42	596	6980	75	1420

16	4980	67	900	5690	65	997	6540	74	1310
17	4760	61	787	5840	93	1480	6720	78	1410
18	5210	56	792	6840	75	1380	7040	82	1560
19	5530	52	769	5890	49	789	7600	86	1780
20	5360	47	684	5230	37	519	6330	89	1520

21	5630	43	658	6420	34	593	4950	88	1180
22	4730	40	504	5960	23	375	5500	86	1290
23	4910	37	489	5720	17	260	5840	85	1340
24	5380	35	514	5400	18	262	5610	83	1260
25	5760	34	528	6370	22	380	e5400	82	1200

26	5280	32	462	5630	28	424	e5370	81	1170
27	5800	30	476	6030	31	506	5350	79	1140
28	5350	28	408	6480	26	451	5390	77	1120
29	5960	26	424	7350	21	418	5610	75	1130
30	5720	28	429	6270	18	304	5950	72	1160

31	5780	39	606	---	---	---	6240	70	1170

TOTAL	214690	---	45485	171510	---	20021	222940	---	53147


	JANUARY			FEBRUARY			MARCH

1	6300	69	1170	e4800	91	1180	18000	255	12300
2	7010	77	1460	e4500	83	1010	17400	245	11500
3	6070	66	1090	e4500	74	898	17300	235	11000
4	5750	60	934	e4700	66	834	16900	225	10300
5	6280	72	1230	e5000	59	792	16500	216	9620

6	6670	65	1170	e4700	53	671	15800	208	8860
7	5890	50	798	e4700	48	605	14800	190	7570
8	6150	64	1070	e4800	106	1370	12400	149	4970
9	6480	75	1310	e4800	154	2000	9450	116	2970
10	6370	66	1140	e4800	149	1930	8990	116	2820

11	5510	71	1050	5640	143	2180	10800	156	4630
12	6860	119	2240	6830	138	2540	12200	185	6110
13	7940	151	3240	6440	132	2300	9640	177	4580
14	8700	131	3080	6150	127	2120	7570	168	3420
15	7610	108	2210	7100	122	2340	6980	149	2800

16	5300	112	1590	5620	118	1790	7180	157	3070
17	6240	137	2320	6590	113	2030	9770	156	4140
18	5860	109	1720	7550	109	2220	11500	135	4170
19	5610	92	1390	7110	105	2020	8710	116	2720
20	4850	95	1240	7780	101	2120	8580	100	2320

21	5500	93	1380	7850	97	2050	9920	87	2340
22	6230	68	1140	7380	92	1830	10500	78	2230
23	4990	69	916	7410	87	1750	11000	71	2100
24	5210	83	1170	7750	83	1740	11000	64	1900
25	4630	79	981	9620	120	3250	9910	62	1660

26	5480	70	1030	13500	118	4290	9400	73	1850
27	e4800	50	644	14800	113	4560	9260	87	2170
28	e4600	41	507	17300	208	9780	8580	94	2170
29	e4400	39	458	18900	265	13500	10300	79	2190
30	e4500	52	636	---	---	---	11000	65	1950

31	e4700	72	918	---	---	---	10500	54	1540

TOTAL	182490	---	41232	218620	---	75700	351840	---	141970


	APRIL			MAY			JUNE

1	9520	57	1450	25600	320	22100	21000	328	19000
2	8290	87	1950	24700	302	20100	e22300	346	20800
3	7640	77	1600	23800	283	18100	24200	373	24400
4	6650	58	1040	e22000	259	15400	25200	389	26400
5	8900	57	1370	e21000	213	12100	25500	370	25500

6	7240	59	1140	19500	172	9010	25800	344	24000
7	6440	59	1030	16100	139	6030	25900	304	21300
8	7120	131	2570	13100	113	4000	25700	284	19600
9	8290	112	2520	12100	112	3660	25200	306	20800
10	6910	100	1860	13100	174	6240	24600	302	20100

11	6760	146	2640	15600	187	7900	24100	286	18600
12	8160	198	4400	16200	189	8270	23900	270	17400
13	9250	173	4330	16100	191	8280	23300	251	15800
14	7610	154	3140	16400	193	8590	23000	229	14200
15	6170	151	2510	17400	195	9200	23000	200	12400

16	6790	156	2880	17800	193	9280	23300	199	12500
17	7770	168	3540	17800	179	8630	24100	205	13300
18	10000	181	4940	18200	172	8460	24600	210	14000
19	11400	195	6020	17700	182	8680	25100	216	14700
20	12100	210	6910	17300	194	9050	25700	249	17300

21	12800	246	8550	17700	196	9350	27900	332	25100
22	18200	393	21300	18100	174	8500	29900	324	26200
23	e20000	610	32900	18300	170	8420	32300	310	27000
24	23300	723	44400	21100	217	12500	33600	297	26900
25	24200	600	39200	23000	270	16700	35700	344	33300

26	25600	500	34500	e21500	303	17600	38800	558	58600
27	26500	417	29800	22000	336	20400	39900	584	62800
28	26800	290	21000	22400	350	21100	40800	355	39100
29	26800	232	16800	e22600	342	20800	41900	316	35800
30	26400	280	19900	e21900	375	22200	42900	284	32800

31	---	---	---	e21200	356	20400	---	---	---

TOTAL	393610	---	326190	591300	---	381050	849200	---	739700


	JULY			AUGUST			SEPTEMBER

1	43000	193	22400	11300	118	3600	7180	37	725
2	42200	199	22700	11300	122	3710	6750	39	709
3	41300	211	23500	11800	148	4740	6360	57	972
4	40100	216	23400	13400	228	8280	6310	83	1410
5	41200	416	46800	14000	208	7860	6620	104	1860

6	42200	820	93400	12600	163	5530	7550	88	1790
7	42900	518	59900	11000	163	4850	7040	72	1370
8	42500	322	37000	12800	292	10100	6630	63	1130
9	41500	281	31500	13900	329	12300	7000	64	1200
10	40500	260	28400	15100	295	12100	7310	65	1290

11	41100	308	34300	15300	258	10600	7830	67	1410
12	41200	488	54300	12900	197	6880	7960	70	1530
13	40900	378	41800	11000	147	4370	10300	113	3190
14	40600	306	33600	8720	110	2580	12400	177	5940
15	40200	283	30700	6910	85	1580	13600	126	4620

16	40000	261	28200	6600	73	1310	14700	86	3380
17	39600	248	26600	8690	64	1490	14400	95	3680
18	38600	254	26500	8170	62	1360	13400	107	3880
19	37400	261	26400	8230	79	1760	12300	111	3690
20	36600	269	26600	8200	104	2310	11000	91	2710

21	35400	276	26300	8320	121	2710	10800	74	2170
22	33400	284	25600	6440	107	1850	11900	60	1930
23	31500	292	24700	6100	141	2330	10400	51	1430
24	29300	300	23700	8490	100	2280	10800	64	1890
25	26800	293	21200	9260	68	1700	12600	102	3490

26	22700	250	15400	8400	62	1400	13700	137	5080
27	18400	212	10500	7090	57	1100	14200	123	4720
28	15200	179	7340	7180	53	1030	13100	109	3860
29	13000	152	5340	6250	49	818	13000	96	3380
30	11400	129	3940	5970	45	718	12500	87	2960

31	11300	115	3500	6960	41	769	---	---	---

TOTAL	1062000	---	885520	302380	---	124015	309640	---	77396

YEAR	4870220		2911426

e Estimated