05586100 DATA: Sediment Tables, 2002

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.

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 1994-2002.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1975-93 and 1996 to current.
	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.
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 NGVD of 1929 (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, 1,380 mg/L, June 12; minimum daily, 56 mg/L, Nov. 19.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 252,000 tons, May 17; minimum daily, 987 tons, Sept. 16.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
		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	10800	322	9330	33600	332	30200	14900	184	7400
2	8980	382	9290	33600	326	29600	14800	148	5930
3	7890	331	7070	33800	285	26000	15500	132	5550
4	7450	272	5480	33700	242	22000	16900	185	8470
5	7460	235	4740	33100	214	19100	16600	244	10800

6	8430	261	5950	32300	225	19600	16200	303	13300
7	9680	286	7490	31400	238	20200	16500	340	15100
8	10400	264	7390	30300	251	20500	16600	303	13600
9	10300	229	6330	29100	252	19800	16900	260	11900
10	10200	193	5330	27900	216	16300	17200	220	10200

11	8520	172	3970	26800	177	12800	17000	194	8860
12	10700	233	6700	25500	147	10100	16900	169	7710
13	12400	191	6410	24000	139	9010	16300	144	6340
14	14100	169	6460	22600	132	8010	15600	166	6990
15	16300	241	10700	e18300	125	6200	16200	157	6840

16	e21600	388	22600	14200	129	4950	16300	144	6350
17	24500	489	32300	12100	140	4600	17100	132	6090
18	25500	488	33600	11100	91	2740	18100	133	6510
19	26500	635	45500	10000	56	1510	e19400	184	9660
20	27400	684	50700	9870	69	1850	e22400	240	14500

21	27900	659	49700	10500	86	2430	24100	314	20400
22	28400	524	40100	10100	102	2780	25400	417	28600
23	29100	401	31500	10200	117	3220	26200	359	25300
24	30000	386	31300	11800	125	4000	26900	282	20500
25	30000	378	30700	11200	133	4030	27000	242	17700

26	30200	370	30200	11900	142	4550	26200	205	14500
27	30800	362	30200	13600	154	5660	e23200	168	10500
28	31800	347	29800	13900	180	6750	19800	144	7720
29	32500	319	28000	14500	206	8050	18300	185	9120
30	32800	322	28500	14300	217	8420	17400	235	11000

31	33400	327	29500	---	---	---	e16000	270	11700

TOTAL	616010	---	646840	615270	---	334960	587900	---	359140


	JANUARY			FEBRUARY			MARCH

1	e14500	255	10000	26100	795	55900	34200	166	15300
2	e13800	236	8810	27300	792	58300	34200	148	13700
3	e13000	217	7640	30100	580	47100	33600	128	11600
4	e15000	199	8020	32000	404	34800	33400	107	9680
5	e14000	179	6790	33500	364	32900	33100	93	8300

6	e13500	158	5770	34600	320	29800	33400	104	9400
7	e13000	137	4800	35300	273	26000	33800	119	10900
8	e14000	118	4460	35600	240	23100	34500	134	12400
9	e12500	119	4020	35700	243	23400	34800	149	14000
10	e12000	122	3960	35400	217	20700	35800	171	16600

11	12900	136	4730	35100	193	18200	37800	235	24000
12	13800	183	6850	34800	187	17500	39400	293	31200
13	14200	195	7470	34200	182	16800	40800	259	28600
14	13700	170	6290	33400	183	16500	42000	258	29300
15	12800	159	5520	32300	200	17400	43000	295	34300

16	12900	151	5290	31400	169	14300	43600	298	35000
17	12600	143	4860	30700	149	12400	43800	188	22300
18	12000	135	4380	29900	165	13300	43800	170	20100
19	12000	127	4120	28900	132	10300	43200	161	18700
20	11900	119	3830	28400	126	9650	42500	151	17400

21	10600	111	3180	28600	218	16800	41400	142	15900
22	9730	103	2710	29900	317	25600	40200	136	14700
23	9850	96	2560	31100	252	21200	39100	137	14400
24	9830	89	2370	32300	194	16900	38100	132	13600
25	10900	96	2840	33100	183	16400	37000	127	12700

26	11300	129	3930	33600	167	15100	35600	123	11800
27	10700	109	3140	34100	149	13700	34400	118	10900
28	9930	93	2480	34400	144	13400	33200	113	10100
29	10400	81	2260	---	---	---	32300	110	9550
30	11400	104	3250	---	---	---	31000	111	9320

31	e21500	413	23900	---	---	---	30300	113	9270

TOTAL	390240	---	170230	901800	---	637450	1153300	---	515020


	APRIL			MAY			JUNE

1	29900	119	9650	54500	491	72100	71700	78	15200
2	29900	150	12100	56200	334	50600	69100	72	13500
3	29700	143	11500	57300	207	32000	66300	68	12200
4	29800	142	11400	57400	171	26500	62900	72	12300
5	29800	137	11000	56700	147	22600	60100	89	14400

6	29800	116	9330	54900	448	65600	57900	138	21600
7	29800	97	7790	51800	765	108000	56500	181	27600
8	30200	87	7090	49600	277	37000	54900	189	28000
9	32400	118	10400	50200	296	40400	53200	168	24100
10	34700	228	21400	54100	628	91800	51000	149	20600

11	36000	267	25900	55800	690	104000	49400	143	19100
12	36600	334	33000	62200	740	124000	48300	1380	180000
13	37300	294	29500	68900	340	63000	52800	821	116000
14	38200	192	19800	70900	212	40400	56800	323	49300
15	38800	166	17300	81000	172	37600	58200	274	43100

16	39300	152	16100	90800	464	116000	60400	197	32100
17	39200	164	17400	99400	941	252000	62600	204	34400
18	39200	254	26900	104000	421	118000	64300	195	33900
19	38500	319	33200	105000	213	60400	64500	174	30400
20	38000	298	30600	106000	153	43700	63500	159	27300

21	37700	285	29000	105000	134	37900	60900	205	33600
22	39000	325	34200	102000	134	37100	57200	329	50900
23	40100	213	23000	99600	152	40900	54500	277	40800
24	41000	264	29300	96400	212	55100	51900	211	29600
25	42400	526	60400	93300	249	62700	49200	174	23100

26	43700	667	78700	90200	231	56200	46300	219	27400
27	44100	547	65300	87600	209	49600	43900	270	31700
28	48800	714	94300	84300	188	42800	41100	320	35500
29	51100	766	106000	80500	146	31900	38500	355	36900
30	52800	647	92300	77300	70	14500	36200	338	33100

31	---	---	---	74300	69	13800	---	---	---

TOTAL	1127800	---	973860	2377200	---	1948200	1664100	---	1097700


	JULY			AUGUST			SEPTEMBER

1	34200	320	29500	10200	114	3130	14200	243	9330
2	31800	307	26300	8620	99	2310	12000	207	6730
3	29700	294	23600	8460	88	2000	10000	156	4230
4	25900	281	19700	8340	83	1860	9830	114	3030
5	22000	268	16000	7300	96	1890	9860	108	2880

6	19400	284	14900	8880	110	2650	8520	103	2370
7	17400	381	17800	9210	119	2960	7380	91	1810
8	15300	483	20000	8200	113	2500	7180	79	1530
9	13700	540	19900	7310	105	2080	6930	67	1250
10	12900	465	16200	8050	98	2120	6190	59	990

11	13000	381	13400	7310	90	1780	6250	66	1110
12	13400	297	10800	7350	83	1640	6700	73	1320
13	13800	227	8460	7370	82	1630	6480	77	1350
14	13800	199	7410	7640	100	2070	6380	72	1240
15	13200	173	6170	8240	119	2650	6010	67	1090

16	11500	150	4660	8000	138	2990	5950	61	987
17	9830	137	3650	9310	170	4270	6130	63	1050
18	8630	125	2910	10800	246	7100	6330	85	1460
19	7460	118	2370	12700	381	13100	6010	109	1770
20	7310	127	2500	13400	343	12400	6200	125	2100

21	8430	137	3110	12500	245	8310	6190	123	2060
22	8660	146	3430	12000	168	5460	5290	120	1720
23	8720	153	3630	15800	204	9240	6170	117	1950
24	8500	151	3460	23700	430	27600	7440	114	2280
25	8530	148	3410	26400	618	44100	7680	110	2280

26	8310	145	3260	28500	579	44600	6260	104	1760
27	10200	143	3940	28800	519	40400	4650	98	1230
28	12200	142	4680	27800	442	33200	5100	92	1260
29	12500	148	5000	26100	360	25400	5600	86	1300
30	12500	155	5250	22000	278	16600	5490	78	1150

31	11600	149	4670	17800	224	10800	---	---	---

TOTAL	444380	---	310070	418090	---	338840	214400	---	64617

YEAR	10510490		7396927

e Estimated