USGS CD-ROM: Sediment Tables

05586100 ILLINOIS RIVER AT VALLEY CITY, IL

LOCATION.--Lat 39°42'12", long 90°38'43", in SE¼NW¼ 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.--Decemer 1974 to current year.

PERIOD OF DAILY RECORD.--
SUSPENDED SEDIMENT: Feb. 1980 to current year.

REMARKS.--Suspended-sediment samples were collected by a local observer once weekly with additional samples collected during high runoff periods.

EXTREMES FOR PERIOD OF DAILY RECORD.--
SEDIMENT CONCENTRATIONS: Maximum daily, 3,720 mg/L, Apr. 14, 1981; minimum daily, 14 mg/L, Dec. 26, 1984, July 21, 1993.
SEDIMENT LOADS: Maximum daily, 410,000 tons, June 4, 1980; minimum daily, 172 tons, Sept. 2, 1984.

EXTREMES FOR CURRENT YEAR.--
SEDIMENT CONCENTRATIONS: Maximum daily, 617 mg/L, July 21; minimum daily, 29 mg/L, Oct. 13.
SEDIMENT LOADS: Maximum daily, 98,000 tons, June 22; minimum daily, 588 tons, Oct. 13.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
		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	6870	62	1150	8490	42	963	13200	93	3380
2	7520	40	823	8800	52	1240	14300	136	5250
3	7090	32	605	8240	54	1210	14200	147	5550
4	6600	40	714	8870	50	1210	12200	139	4580
5	7260	52	1020	9310	47	1180	11600	121	3770

6	7940	73	1550	9130	43	1060	11500	98	3070
7	7250	72	1410	8400	41	946	11600	80	2510
8	7280	65	1280	8900	43	1020	11600	65	2050
9	6890	58	1060	8110	44	963	11300	57	1710
10	5980	50	806	7880	45	968	9800	60	1590

11	6980	40	753	7950	47	1010	9820	65	1740
12	7720	32	673	7760	48	1000	10700	69	2020
13	7570	29	588	7130	50	956	10900	71	2070
14	6800	38	701	7040	49	935	9950	72	1930
15	7000	51	965	7050	43	829	10000	74	2010

16	6850	67	1230	6940	38	713	10800	74	2150
17	6540	77	1370	e7200	35	682	10300	70	1940
18	6740	69	1250	e7600	39	833	10100	66	1790
19	7030	60	1140	7400	44	860	9330	62	1550
20	7090	54	1050	6930	50	932	9370	63	1630

21	6740	51	915	6900	54	1010	10800	78	2320
22	6570	48	864	7280	56	1100	10300	89	2440
23	7450	45	915	7580	57	1160	8800	74	1760
24	7020	43	806	7430	58	1160	9710	70	1850
25	6370	43	741	7100	59	1130	10100	69	1900

26	6560	52	919	6260	60	991	10800	84	2450
27	5830	57	902	7370	72	1520	11700	124	3970
28	7040	48	915	8720	79	1830	13600	118	4380
29	6710	41	730	8120	61	1360	14000	109	4100
30	7210	34	675	11100	58	1770	14000	101	3850

31	8390	33	746	---	---	---	14200	95	3630

TOTAL	216890	---	29266	236990	---	32541	350580	---	84940


	JANUARY			FEBRUARY			MARCH

1	e13800	88	3290	28700	81	6180	41400	229	25600
2	12900	80	2760	26600	86	6130	41400	173	19300
3	11800	68	2160	25800	90	6320	40400	132	14300
4	12300	69	2330	26900	95	6860	38900	100	10500
5	15500	81	3460	28000	96	7270	37800	80	8190

6	20800	144	8630	28500	98	7510	36900	79	7850
7	24500	279	18600	29000	103	8000	35800	79	7630
8	27900	362	27800	28800	108	8420	35600	90	8810
9	32000	401	34800	28700	112	8670	38600	376	39300
10	34400	351	33100	28400	144	11000	39600	313	33400

11	36500	359	35400	29600	380	31300	41300	239	26400
12	37800	343	35200	33500	598	54300	42200	182	20600
13	38900	248	26100	35600	350	33800	42800	139	16100
14	39700	241	25900	37000	323	32400	43400	115	13500
15	40200	172	18600	37400	303	30600	43500	116	13700

16	40600	131	14300	37500	280	28300	44200	148	17700
17	40700	134	14800	37600	248	25200	44800	295	35900
18	40800	140	15300	37900	219	22500	47900	477	61800
19	40000	131	14100	38500	194	20200	50100	353	47900
20	39300	87	9270	38800	171	18000	52400	215	30400

21	38700	63	6540	39000	150	15700	56700	201	31000
22	37600	71	7150	39300	131	13900	62100	188	31700
23	36600	79	7750	39400	119	12700	66900	172	31100
24	35600	81	7740	39300	119	12700	70100	163	31000
25	34500	82	7620	38800	119	12500	72800	139	27300

26	33300	82	7360	38600	220	22800	74200	91	18400
27	32200	78	6790	39700	400	43400	74400	58	11700
28	31100	75	6270	41000	333	36900	73800	58	11500
29	30100	71	5780	---	---	---	73400	78	15400
30	29200	71	5580	---	---	---	72700	86	16900

31	29200	75	5940	---	---	---	71300	63	12200

TOTAL	968500	---	420420	957900	---	543560	1607400	---	697080


	APRIL			MAY			JUNE

1	70500	52	9920	47400	240	30600	51900	106	14800
2	69700	104	19400	48900	244	32200	49200	131	17300
3	68700	116	21500	50700	170	23200	46300	156	19400
4	68600	96	17700	52300	140	19800	43500	178	20800
5	67600	68	12500	53800	121	17600	40800	183	20100

6	66600	57	10200	54600	86	12700	38200	162	16600
7	64800	47	8260	54200	96	14000	35900	142	13700
8	62400	49	8160	55500	110	16500	33700	124	11300
9	61800	50	8390	57300	92	14300	32600	113	9930
10	61800	38	6330	60100	92	15100	33100	188	16800

11	61200	43	7040	64700	91	15900	32400	257	22500
12	60100	51	8290	69000	64	12100	32500	232	20400
13	58600	73	11600	72500	55	10800	34400	321	29900
14	58600	156	24600	74700	53	10600	36900	376	37800
15	58600	96	15200	75800	52	10700	40500	337	37100

16	57400	86	13300	76000	50	10300	43700	305	36300
17	55600	36	5390	75300	68	13800	46900	276	35200
18	54100	36	5260	73900	60	11900	49700	258	34800
19	53200	32	4670	72300	62	12000	52600	287	41100
20	52400	36	5010	70300	66	12500	56800	327	50400

21	51700	56	7790	69000	114	21200	58300	439	69100
22	51200	58	8040	65400	220	38700	61000	592	98000
23	50400	46	6230	63500	170	29100	63200	233	39500
24	49600	44	5890	62200	102	17200	64300	91	15800
25	48800	44	5810	62100	185	31100	64500	67	11700

26	48200	48	6210	62100	292	48900	63900	48	8110
27	47200	52	6610	61100	130	21500	63000	102	17300
28	46300	56	6940	60400	104	16900	61600	451	74800
29	46300	58	7220	58900	93	14800	61500	487	81100
30	46100	120	14900	56600	91	13900	63400	437	74700

31	---	---	---	54300	89	13000	---	---	---

TOTAL	1718100	---	298360	1934900	---	582900	1456300	---	996340


	JULY			AUGUST			SEPTEMBER

1	63400	246	42100	11800	81	2570	10100	126	3410
2	62200	135	22700	11000	98	2890	9410	112	2820
3	60200	87	14100	9860	111	2940	8400	98	2200
4	57500	82	12700	9800	110	2960	7650	85	1740
5	54100	79	11500	12900	139	4950	6920	74	1380

6	51900	78	10900	16200	177	7880	6800	64	1180
7	50100	137	18400	20500	226	12800	6570	58	1010
8	49700	507	68300	21800	287	16900	6210	56	929
9	49400	371	49500	21600	366	21600	6770	54	999
10	48300	293	37900	22600	364	22200	8760	52	1260

11	48100	272	35300	22400	329	19900	9430	53	1350
12	48000	181	23400	21700	310	18200	8590	62	1400
13	47000	131	16500	21000	264	15000	6860	71	1290
14	46300	122	15200	16800	218	9780	7630	82	1730
15	45600	114	14000	15300	179	7390	6830	91	1640

16	44400	106	12700	14300	148	5680	7120	83	1630
17	43200	112	13000	13800	122	4520	7870	79	1670
18	42100	145	16500	12600	120	4080	7460	88	1780
19	40200	167	17900	14700	135	5450	7400	99	1970
20	38000	202	20600	16000	131	5680	6910	114	2110

21	35300	617	57900	14200	119	4490	6570	125	2190
22	33000	485	43200	12100	107	3460	6190	115	1930
23	31400	227	19300	10400	97	2680	5960	106	1680
24	29000	142	11100	9080	90	2190	6210	97	1640
25	27100	175	12600	9130	90	2220	6830	89	1650

26	24900	223	14800	8950	90	2190	6590	81	1430
27	22500	241	14700	9420	94	2410	5830	74	1170
28	20000	184	9880	10200	99	2730	6120	68	1130
29	16900	139	6270	10900	105	3100	6160	63	1040
30	14200	105	4010	11400	111	3410	5540	61	912

31	13000	82	2880	10800	119	3420	---	---	---

TOTAL	1257000	---	669840	443240	---	225670	215690	---	48270

YEAR	11363490		4629187

e Estimated