05586100 DATA: Sediment Tables, 1999

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.--
SUSPENDED-SEDIMENT DISCHARGE: Feb. 1980 to current year.

REMARKS.--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 this record have been collected at upstream side Rt. 106 bridge at Florence at mile 56.

EXTREMES FOR PERIOD OF 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, 937 mg/L, June 3; minimum daily, 38 mg/L, Sept. 4.
SEDIMENT LOADS: Maximum daily, 102,000 tons, June 3; minimum daily, 564 tons, Sept. 12.

SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
		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	5470	64	947	10500	120	3400	8840	49	1180
2	6020	70	1140	12200	174	5820	9640	50	1290
3	6350	76	1310	17300	273	13000	9170	60	1480
4	6240	84	1410	22400	324	19600	9350	73	1860
5	7090	91	1750	18700	134	6880	10500	85	2430

6	7920	98	2100	13200	62	2210	9940	87	2330
7	8360	101	2280	9650	55	1430	13900	174	6940
8	8310	103	2320	8730	51	1200	17800	334	16000
9	7680	106	2200	9700	116	3220	17600	266	12600
10	9340	105	2650	14600	593	23700	16400	199	8830

11	8700	96	2240	18400	377	18600	15900	157	6730
12	7210	89	1730	20100	272	14700	16100	145	6330
13	e7200	90	1750	22300	221	13300	15600	135	5700
14	6470	92	1600	22600	239	14600	14600	126	4980
15	6590	93	1660	21200	247	14100	13400	117	4230

16	6290	95	1610	19300	254	13200	10800	108	3170
17	7270	97	1900	16700	243	10900	10500	100	2840
18	7270	98	1930	16700	182	8170	11200	93	2830
19	9400	123	3260	15400	133	5550	9800	86	2290
20	16100	247	10900	14500	105	4100	9550	82	2120

21	20000	390	21100	14900	102	4080	9720	86	2250
22	20000	500	27000	13200	100	3540	9070	90	2210
23	18700	598	30200	10500	96	2710	8720	95	2270
24	17600	716	34000	10000	86	2320	8210	100	2220
25	16000	761	32900	11300	77	2340	7300	106	2110

26	14000	581	22100	10200	69	1890	6930	111	2080
27	12100	434	14200	9860	62	1660	8100	114	2490
28	10900	325	9550	9970	59	1580	7340	107	2130
29	11300	243	7420	9910	55	1480	6680	100	1810
30	11200	182	5520	9940	52	1400	e7000	94	1780

31	11000	136	4020	---	---	---	e7200	88	1710

TOTAL	318080	---	254697	433960	---	220680	336860	---	119220


	JANUARY			FEBRUARY			MARCH

1	e5600	82	1240	59400	281	45100	32100	92	7950
2	e6000	77	1250	60900	232	38100	30800	99	8180
3	e5600	73	1100	61300	154	25400	29700	105	8460
4	e5700	72	1110	61500	100	16600	28800	113	8750
5	e5800	71	1110	61200	78	12900	28300	120	9190

6	e6000	70	1140	60900	93	15400	29100	129	10100
7	e6000	69	1120	59600	93	14900	29900	138	11100
8	e5900	68	1090	59600	91	14700	29300	146	11600
9	e6200	67	1130	59500	89	14200	28700	154	11900
10	e5900	67	1060	55200	87	13000	28600	161	12500

11	e5500	66	975	55200	88	13000	28500	140	10800
12	e5400	65	944	54900	103	15200	28800	120	9340
13	e6500	63	1110	54600	106	15600	29000	114	8910
14	e6100	62	1020	54100	126	18400	28900	110	8550
15	e6000	61	986	53400	117	16900	29300	111	8780

16	e6500	60	1050	51800	106	14900	28600	112	8690
17	e7000	58	1100	50700	97	13300	26900	114	8280
18	e7200	57	1110	49300	92	12200	26400	116	8240
19	e7200	56	1090	47600	87	11200	28000	117	8870
20	e8600	63	1460	45700	83	10200	29100	119	9350

21	e8800	116	2740	44100	79	9380	29700	121	9690
22	e15000	222	8980	42100	75	8500	30000	122	9920
23	32600	426	37500	40600	71	7800	30100	123	10000
24	35800	670	64800	38800	68	7100	29600	120	9560
25	38900	646	67800	37300	64	6490	29200	116	9150

26	42400	606	69300	35800	64	6170	28800	112	8740
27	45500	568	69800	34700	71	6660	28000	109	8240
28	48700	498	65500	33100	82	7270	27200	110	8050
29	51800	347	48500	---	---	---	26200	125	8840
30	54900	287	42700	---	---	---	24400	144	9470

31	57400	371	57500	---	---	---	e22000	165	9820

TOTAL	556500	---	557315	1422900	---	410570	884000	---	291020


	APRIL			MAY			JUNE

1	20500	190	10500	58800	72	11500	40200	191	20800
2	19900	205	11000	58400	89	14100	40800	649	69600
3	20800	184	10300	58200	73	11400	40500	937	102000
4	21500	164	9520	57500	69	10800	40900	714	78800
5	21500	146	8500	57300	112	17200	41200	543	60400

6	21000	135	7640	56200	119	18000	41600	433	48600
7	20200	125	6840	54300	43	6240	42000	428	48500
8	20500	125	6930	53200	41	5870	41900	413	46800
9	21000	152	8570	e51500	63	8740	41700	301	33800
10	21000	186	10600	e50500	63	8570	41600	296	33200

11	21200	228	13100	49700	67	8980	42100	319	36200
12	21800	276	16200	49100	83	10900	42200	344	39200
13	21900	292	17200	48900	90	11800	41800	384	43400
14	23000	297	18400	50000	117	15800	42000	440	49900
15	25300	303	20700	51600	140	19500	42800	422	48800

16	31600	276	23400	53200	142	20300	44300	364	43600
17	33600	264	24000	55100	198	29500	46300	264	32900
18	36100	483	47100	57300	330	51000	47800	134	17300
19	38800	429	45000	58400	232	36600	49100	140	18600
20	40700	352	38600	58300	142	22300	49600	145	19400

21	42500	280	32200	56800	86	13200	49600	149	19900
22	44900	214	25800	55200	96	14200	49100	145	19300
23	47300	118	15100	53000	111	15900	47900	132	17000
24	49300	137	18300	51100	111	15300	47300	142	18100
25	50500	194	26500	49500	129	17300	45800	137	16900

26	51200	198	27400	48100	129	16800	44600	117	14100
27	52500	168	23800	46900	118	15000	43400	113	13300
28	54300	124	18200	45000	105	12800	42300	193	22100
29	56600	104	16000	43500	99	11600	41200	257	28600
30	58500	59	9260	42100	132	15000	39600	294	31400

31	---	---	---	41200	160	17800	---	---	---

TOTAL	1009500	---	566660	1619900	---	504000	1311200	---	1092500


	JULY			AUGUST			SEPTEMBER

1	39500	236	25200	10100	119	3250	8500	65	1500
2	38500	220	22900	10400	99	2770	7700	52	1080
3	36900	298	29700	11000	85	2520	7570	42	854
4	34800	319	30000	9990	82	2210	7100	38	732
5	32700	337	29700	8510	79	1820	7040	51	958

6	30500	316	26100	8020	77	1660	6860	68	1260
7	28500	211	16200	8510	75	1720	6760	81	1470
8	26600	137	9840	8610	74	1720	7200	67	1310
9	e24000	104	6720	8960	74	1780	6790	54	996
10	21300	119	6830	8270	73	1630	6660	46	821

11	18200	130	6400	7590	74	1510	6430	43	740
12	16100	142	6150	8090	89	1950	5230	40	564
13	15600	148	6260	11000	124	3720	5320	40	571
14	15300	137	5650	11600	160	5010	6140	46	766
15	13500	126	4580	11900	172	5520	5260	54	769

16	11900	115	3700	11500	170	5300	5330	64	915
17	11100	106	3180	10500	139	3960	5680	72	1100
18	10500	99	2800	9520	112	2900	5810	72	1130
19	10100	96	2620	9150	91	2250	6200	73	1220
20	11200	99	3020	8290	73	1640	4940	73	968

21	14700	104	4150	8580	62	1440	5650	68	1040
22	14200	100	3850	7710	69	1430	5380	63	920
23	13300	96	3460	8210	110	2440	5660	59	902
24	12400	97	3220	8810	148	3530	5390	55	800
25	11600	110	3470	9930	123	3280	5450	51	749

26	11000	127	3770	10200	98	2710	5760	46	719
27	10500	142	4030	9960	79	2120	5150	42	585
28	11300	144	4390	10000	68	1840	5220	40	573
29	11600	146	4560	9770	73	1920	6860	46	849
30	10600	148	4220	9610	80	2060	11200	52	1550

31	10100	142	3870	9190	80	1990	---	---	---

TOTAL	578100	---	290540	293480	---	79600	190240	---	28411

YEAR	8954720		4415213

e Estimated