05586100 DATA: SW_QUAL_TBL

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. Auxiliary gage 10.0 miles upstream.

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 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1975-93 and 1996 to current year.
	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; sediment concentration and particle size, water years 1996-2003.
BIOLOGICAL
	ALGAE: Water years 1980-81, 1997-98, and 2002-03.
	BENTHIC MACROINVERTEBRATES: Water years 1997-98 and 2002.
	FISH: Water year 1998 and 2003-04.
	HABITAT: Water years 1997-98 and 2003.

GAGE.-- U.S. Army Corps of Engineer's water-stage recorder and satellite telemeter, 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). Prior to Nov. 25, 1992 and Oct. 1, 1994 to current; auxiliary gage (05585500) at site 10.0 mi upstream. Nov. 25, 1992 to Sept. 30, 1994; auxiliary gage operated at this site (05586100).

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.

REMARKS FOR CURRENT YEAR.--Sampled as part of the Lower Illinois River Basin (LIRB) National Water Quality Assessment Program (NAWQA).

SURFACE-WATER QUALITY

												Alka-	Bicar-
							Dis-	pH,	Specif.			linity,	bonate,
		Agency	Agency		Instan-		solved	water,	conduc-			wat flt	wat flt
		col-	ana-		taneous	Dis-	oxygen,	unfltrd	tance,	Temper-	Temper-	inc tit	incrm.
		lecting	lyzing	Gage	dis-	solved	percent	field,	wat unf	ature,	ature,	field,	titr.,
Date	Time	sample,	sample,	height,	charge,	oxygen,	of sat-	std	uS/cm	air,	water,	mg/L as	field,
		code	code	feet	cfs	mg/L	uration	units	25 degC	deg C	deg C	CaCO₃	mg/L
		(00027)	(00028)	(00065)	(00061)	(00300)	(00301)	(00400)	(00095)	(00020)	(00010)	(39086)	(00453)
OCT 2003
15...	1350	81700	80020	1.87	5170	12.8	136	7.8	805	20.5	18.0	194	230
DEC
02...	1215	81700	80020	8.27	28600	12.6	99	8.1	687	5.0	4.8	179	217
FEB 2004
25...	1130	81700	80020	5.00	16000	16.5	126	8.1	1050	2.5	3.5	208	E253
APR
07...	1300	81700	80020	10.90	39500	--	--	7.8	760	22.0	13.1	200	241
MAY
13...	1215	81700	80020	4.61	15300	7.7	90	8.5	826	24.0	23.0	216	257
JUN
10...	1155	81700	80020	13.70	47400	--	--	7.9	653	28.0	24.7	192	231
JUL
06...	1105	81700	80020	8.84	30100	5.7	71	8.0	667	24.5	26.5	204	244
AUG
03...	1145	81700	80020	2.73	7190	6.2	78	8.0	742	27.0	26.8	202	243

	Carbon-				Nitrite		Ortho-		Total	2,6-Di-
	ate,				+		phos-		nitro-	ethyl-
	wat flt	Chlor-		Ammonia	nitrate	Nitrite	phate,	Phos-	gen,	aniline		Aceto-	Ala-
	incrm.	ide,	Sulfate	water,	water	water,	water,	phorus,	wat unf	water	CIAT,	chlor,	chlor,
	titr.,	water,	water,	fltrd,	fltrd,	fltrd,	fltrd,	water,	by anal	fltrd	water,	water,	water,
Date	field,	fltrd,	fltrd,	mg/L	mg/L	mg/L	mg/L	unfltrd	ysis,	0.7u GF	fltrd,	fltrd,	fltrd,
	mg/L	mg/L	mg/L	as N	as N	as N	as P	mg/L	mg/L	ug/L	ug/L	ug/L	ug/L
	(00452)	(00940)	(00945)	(00608)	(00631)	(00613)	(00671)	(00665)	(62855)	(82660)	(04040)	(49260)	(46342)
OCT 2003
15...	3	85.0	76.2	<.04	1.78	.025	.241	.45	2.85	<.006	E.032	.009	.007
DEC
02...	<1	56.5	59.9	.06	6.06	.033	.193	.48	7.46	<.006	E.013	.015	.022
FEB 2004
25...	<1	144	82.9	.08	5.33	.055	.247	.50	6.78	<.006	E.027	.080	<.080
APR
07...	1	75.5	53.9	<.04	7.39	.037	.133	.32	8.55	--	--	--	--
MAY
13...	3	83.6	73.3	.14	5.14	.043	.149	.34	6.30	<.006	E.051	.114	.016
JUN
10...	2	51.7	40.6	<.04	6.90	.060	.144	.36	7.84	<.006	E.272	.430	.013
JUL
06...	2	57.8	51.6	E.03	3.20	.045	.199	.49	4.23	<.006	E.153	.069	<.005
AUG
03...	2	72.8	69.5	.07	1.77	.073	.220	.41	2.86	<.006	E.057	.069	<.005

Azin-

Ben-

cis-

phos-

flur-

Car-

Carbo-

Per-

alpha-

Atra-

methyl,

alin,

Butyl-

baryl,

furan,

Chlor-

methrin

Cyana-

DCPA,

Diazi-

Diel-

HCH,

zine,

water,

ate,

water,

pyrifos

water

zine,

water

non,

drin,

water,

fltrd

water,

fltrd

water,

fltrd

water,

fltrd

water,

Date

fltrd,

0.7u GF

fltrd,

0.7u GF

fltrd,

0.7u GF

fltrd,

0.7u GF

fltrd,

ug/L

(34253)

(39632)

(82686)

(82673)

(04028)

(82680)

(82674)

(38933)

(82687)

(04041)

(82682)

(39572)

(39381)

OCT 2003

15...

<.005

.176

<.050

<.010

<.002

<.041

<.020

<.005

<.006

<.018

<.003

E.004

<.005

DEC

02...

<.005

.160

<.050

<.010

<.004

<.041

<.020

<.005

<.006

<.018

<.003

.007

<.009

FEB 2004

25...

<.005

.445

<.050

<.010

<.004

<.041

<.020

<.005

<.006

<.018

<.003

.019

<.009

APR

07...

MAY

13...

<.005

.743

<.050

<.010

<.004

<.041

<.020

<.005

<.006

<.018

<.003

.018

<.009

JUN

10...

<.005

4.86

<.050

<.010

<.004

<.041

E.137

<.005

<.006

<.018

<.003

.005

<.009

JUL

06...

<.005

1.24

<.050

<.010

<.004

<.041

<.020

<.005

<.006

<.018

<.003

<.005

<.009

AUG

03...

<.005

.478

<.050

<.010

<.004

<.041

<.020

<.005

<.006

<.018

<.003

<.005

<.009

Ethal-

Methyl

Disul-

flur-

Etho-

para-

Moli-

Naprop-

foton,

EPTC,

alin,

prop,

Linuron

Mala-

thion,

Metola-

Metri-

nate,

amide,

water,

Fonofos

Lindane

water

thion,

water,

chlor,

buzin,

water,

fltrd

water,

fltrd

water,

fltrd

water,

fltrd

Date

0.7u GF

fltrd,

0.7u GF

fltrd,

0.7u GF

fltrd,

0.7u GF

ug/L

(82677)

(82668)

(82663)

(82672)

(04095)

(39341)

(82666)

(39532)

(82667)

(39415)

(82630)

(82671)

(82684)

OCT 2003

15...

<.02

<.002

<.009

<.005

<.003

<.004

<.035

<.027

<.006

.056

<.006

<.002

<.007

DEC

02...

<.02

<.004

<.009

<.005

<.003

<.004

<.035

<.027

<.015

.080

<.006

<.003

<.007

FEB 2004

25...

<.02

<.004

<.009

<.005

<.003

<.004

<.035

<.027

<.015

.210

<.006

<.003

<.007

APR

07...

MAY

13...

<.02

<.004

<.009

<.005

<.003

<.004

<.035

<.027

<.015

.175

<.006

<.003

<.007

JUN

10...

<.02

<.004

<.009

<.005

<.003

<.004

<.035

<.027

<.015

.834

<.010

<.003

<.007

JUL

06...

<.02

<.004

<.009

<.005

<.003

<.004

<.035

<.027

<.015

.250

<.006

<.003

<.007

AUG

03...

<.02

<.004

<.009

<.005

<.003

<.004

<.035

<.027

<.015

.060

<.006

<.003

<.007

Pendi-

Peb-

meth-

Propy-

Pro-

Propar-

Tebu-

Terba-

p,p'-

Para-

ulate,

alin,

Phorate

Prome-

zamide,

Propa-

panil,

gite,

Sima-

thiuron

cil,

DDE,

thion,

water,

water

ton,

water,

chlor,

water,

zine,

water

water,

fltrd

water,

fltrd

water,

fltrd

water,

fltrd

Date

fltrd,

0.7u GF

fltrd,

0.7u GF

fltrd,

0.7u GF

fltrd,

0.7u GF

ug/L

(34653)

(39542)

(82669)

(82683)

(82664)

(04037)

(82676)

(04024)

(82679)

(82685)

(04035)

(82670)

(82665)

OCT 2003

15...

<.003

<.010

<.004

<.022

<.011

.02

<.004

<.010

<.011

<.02

<.010

E.01

<.034

DEC

02...

<.003

<.010

<.004

<.022

<.011

.01

<.004

<.025

<.011

<.02

.083

E.01

<.034

FEB 2004

25...

<.003

<.010

<.004

<.022

<.011

<.01

<.004

<.025

<.011

<.02

.033

<.02

<.034

APR

07...

MAY

13...

<.003

<.010

<.004

<.022

<.011

.01

<.004

<.025

<.011

<.02

.024

<.02

<.034

JUN

10...

<.003

<.010

<.004

<.022

<.011

.03

<.004

<.025

<.011

<.02

.042

<.02

<.034

JUL

06...

<.003

<.010

<.004

<.022

<.011

.03

<.004

<.025

<.011

<.02

.043

E.01

<.034

AUG

03...

<.005

<.010

<.004

<.022

<.011

.03

<.004

<.025

<.011

<.02

.018

E.01

<.034

				Tri-	Sus-
	Terbu-	Thio-	Tri-	flur-	pended
	fos,	bencarb	allate,	alin,	sedi-
	water,	water	water,	water,	ment
	fltrd	fltrd	fltrd	fltrd	concen-
Date	0.7u GF	0.7u GF	0.7u GF	0.7u GF	tration
	ug/L	ug/L	ug/L	ug/L	mg/L
	(82675)	(82681)	(82678)	(82661)	(80154)
OCT 2003
15...	<.02	<.005	<.002	<.009	122
DEC
02...	<.02	<.010	.006	<.009	226
FEB 2004
25...	<.02	<.010	.004	<.009	198
APR
07...	--	--	--	--	166
MAY
13...	<.02	<.010	<.002	<.009	182
JUN
10...	<.02	<.010	<.002	<.009	177
JUL
06...	<.02	<.010	<.002	<.009	322
AUG
03...	<.02	<.010	<.002	<.009	153

Remark codes used in this table: < -- Less than
E -- Estimated value
M -- Presence verified, not quantified