Illinois Low Flow-Frequency Estimates of the 7 Day Low Flow For a 10 Year Recurrence (7DayQ10)
[Ft3/s, cubic feet per second; mi2, square miles; Ft3/s/mi2, cubic feet per second per square mile]
[Stations are located in Illinois unless otherwise indicated.]
							Allen & Cowan	Singh et al	Singh et al	Singh et al
				Lara (1970)	Singh(1973)	Singh(1983)	(1984)	(1988a)	(1988b)	(1993)
		Drainage	Lara (1970)	7DayQ10	7DayQ10	7DayQ10	7DayQ10	7DayQ10	7DayQ10	7DayQ10
Station Number	Station Name	(mi2)	7Q10	(Ft3/s)	(Ft3/s)	(Ft3/s)	(Ft3/s)	(Ft3/s)	(Ft3/s)	(Ft3/s)
3336000	Wabash River at Covington, IN	8,218.00			723.0				756.00
3336500	Bluegrass Creek at Potomac	35.00	0	0.0	0.0				0.00
3336645	Middle Fork Vermilion River Above Oakwood	432.00
3336900	Salt Fork near St. Joseph	134.00			3.6				4.10
3337000	Boneyard Creek at Urbana	4.46	0.17	0.8	0.7				0.56
3337500	Saline Branch at Urbana	68.00	0.02	1.4	1.0				2.40
3338000	Salt Fork near Homer	340.00	0.023	7.8	13.5				22.70
3338500	Vermilion River near Catlin	9.58	0.012	0.1	19.0				30.20
3339000	Vermilion River near Danville	1,279.00	0.0115	14.7	33.0				42.20
3339150	Little Vermilion River near Newport, IN	240.00			0.0				0.00
3340500	Wabash River at Montezuma, IN	11,118.00			886.0				895.00
3341420	Brouilletts Creek near Universal, IN	331.00			1.1				1.10
3341500	Wabash River at Terre Haute, IN	12,265.00			1,008.0				1,040.00
3342000	Wabash River at Riverton, IN	13,161.00			1,249.0				1,274.00
3343000	Wabash River at Vincennes, IN	13,706.00			1,326.0				1,337.00
3343400	Embarras River near Camargo	186.00			0.0				0.51
3344000	Embarras River near Diona	919.00			3.2				4.90
3344500	Range Creek near Casey	7.60	0	0.0	0.0				0.00
3345000	Embrass River near Newton	1,392.00			13.2				13.20
3345500	Embarras River at Ste. Marie	1,516.00	0.0085	12.9	16.6				16.60
3346000	North Fork Embarras River near Oblong	318.00	0.00045	0.1	0.0				0.17
3346500	Embrass River at Lawrenceville	2,333.00			35.0				35.30
3377500	Wabash River at Mount Carmel	28,635.00			2,490.0				2,504.00
3378000	Bonpas Creek at Browns	228.00	0	0.0	0.0				0.00
3378500	Wabash River at New Harmony, IN	29,234.00			2,620.0				2,634.00
3378635	Little Wabash River near Effingham	240.00			0.0				0.00
3378900	Little Wabash River at Louisville	745.00			0.0				0.60
3379500	Little Wabash River below Clay City	1,131.00	0.0005	0.6	0.5				1.40
3380350	Skillet Fork near Iuka	208.00			0.0				0.00
3380475	Horse Creek near Keenes	97.20			0.0				0.00
3380500	Skillet Fork at Wayne City	464.00	0	0.0	0.0				0.05
3381500	Little Wabash River at Carmi	3,102.00	0.00043	1.3	5.7				6.80
3382000	Middle Fork Saline River near Harrisburg	198.00			1.1				0.65
3382100	South Fork Saline River near Carrier Mills	147.00			0.5				2.30
3382170	Brush Creek near Harco	13.30			0.0				0.00
3382350	North Fork Saline River near Ridgeway	423.00			0.0				0.00
3382500	Saline River near Junction	1,051.00			2.4				4.20
3382510	Eagle Creek near Equality	8.51			0.0				0.00
3384450	Lusk Creek near Eddyville	42.90			0.0				0.00
3384500	Ohio River at Golconda	143,900.00			12,610.0				14,610.00
3385000	Hayes Creek at Glendale	19.10	0	0.0	0.0				0.00
3385500	Lake Glendale Inlet near Dixon Springs	1.05			0.0				0.00
3386000	Lake Glendale Outlet near Dixon Springs	1.98			0.0				0.00
3386500	Sugar Creek near Dixon Springs	9.93	0	0.0	0.0				0.00
3611500	Ohio River at Metropolis	203,000.00			44,820.0				53,820.00
3612000	Cache River at Forman	244.00	0	0.0	0.0				0.00
5414820	Sinsinawa River near Menominee	39.60						5.00
5415000	Galena River at Buncombe, WI	125.00			11.7			14.00
5415500	East Fork Galena River at Council Hill	17.60			2.3			2.30
5419000	Apple River near Hanover	247.00	0.06	14.8	20.1			20.10
5420000	Plum River below Carroll Creek near Savanna	230.00	0.038	8.7	10.7			11.20
5420500	Mississippi River at Clinton, IA	85,600.00			13,970.0			13,990.00
5434500	Pecatonica River at Martintown, WI	1,034.00			153.0			153.00
5435000	Cedar Creek near Winslow	1.31			0.0			0.00
5435500	Pecatonica River at Freeport	1,326.00	0.14	185.6	181.0			181.00
5437000	Pecatonica River at Shirland	2,550.00	0.155	395.3	393.0			408.00
5437500	Rock River at Rockton	6,363.00	0.125	795.4	795.0			859.00
5437695	Keith Creek at Eighth St. at Rockford	13.40						0.30
5437950	Kishwaukee River near Huntley	14.40					1.30
5438050	North Branch Kishwaukee River near Harvard	21.10					0.14
5438100	Kishwaukee River near Marengo	89.70					7.20
5438150	S. Branch Kishwaukee River (E.) below Union	73.50					1.40
5438192	Rush Creek near Garden Prairie	29.50					2.00
5438201	Kishwaukee River at Garden Prairie	222.00					14.00
5438215	Coon Creek at New Lebanon	16.30					0.14
5438230	Burlington Creek near Hampshire	15.20					0.11
5438250	Coon Creek at Riley	85.10			2.6		3.00	2.50
5438320	Piscasaw Creek at Chemung	52.90					4.50
5438400	Piscasaw Creek near Capron	90.70					10.00
5438430	Piscasaw Creek near Belvidere	128.00					11.00
5438500	Kishwaukee River at Belvidere	538.00	0.0615	33.1	34.3		36.00	35.60
5438550	Beaver Creek near Poplar Grove	26.10					1.30
5438575	Beaver Creek near Belvidere	64.20					2.00
5438600	Kishwaukee River above S. Branch nr. Perryville	655.00					47.00
5439000	South Branch Kishwaukee River at Dekalb	77.70	0.000275	0.0	0.1		0.07	0.20
5439130	Virgil ditch No. 3 at Virgil	25.70					0.15
5439200	Union Drainage ditch No. 3 near Maple Park	58.00					0.84
5439300	E. Branch of S. Branch Kishwaukee River at Sycamore	107.00					2.10
5439350	S. Branch Kishwaukee River at Genoa	249.00					9.70
5439450	Owens Creek near Kirkland	44.50					0.09
5439500	South Branch Kishwaukee River near Fairdale	387.00	0.017	6.6	9.9		11.00	12.70
5440000	Kishwaukee River near Perryville	1,099.00	0.0525	57.7	62.3		71.00	69.10
5440400	E. Branch Killbuck Creek near Creston	31.40					0.08
5440500	Killbuck Creek  near Monroe Center	117.00	0.026	3.0	3.1		3.00	3.10
5440520	Killbuck Creek near New Milford	136.00					5.60
5441000	Leaf River at Leaf River	103.00	0.105	10.8	8.4			8.60
5441500	Rock River at Oregon	8,203.00	0.135	1107.4	1,100.0			1,148.00
5442000	Kyte River near Flagg Center	116.00	0	0.0	3.3			6.00
5443500	Rock River at Como	8,753.00	0.15	1313.0	1,097.0			1,167.00
5444000	Elkhorn Creek near Penrose	146.00	0.0925	13.5	15.5			15.00
5445500	Rock Creek near Morrison	158.00	0.086	13.6	13.6			14.00
5446500	Rock River near Joslin	9,520.00	0.12	1142.4	1,306.0			1,376.00
5447000	Green River at Amboy	201.00	0.021	4.2	4.9			5.90
5447500	Green River near Geneseo	1,003.00	0.0375	37.6	49.2			50.00
5448000	Mill Creek at Milan	62.40	0.0021	0.1	0.1			0.30
5466000	Edwards River near Orion	155.00	0.011	1.7	1.7			1.80
5466500	Edwards River near New Boston	445.00	0.016	7.1	6.8			6.90
5467000	Pope Creek near Keithsburg	174.00	0.012	2.1	1.9			2.00
5467500	Henderson Creek near Little York	151.00	0.00017	0.0	0.0			0.03
5468000	North Henderson Creek near Seaton	67.10	0.0022	0.1	0.0			0.00
5468500	Cedar Creek at Little York	130.00	0.014	1.8	7.4			7.70
5469000	Henderson Creek near Oquawka	432.00	0.0063	2.7	7.8			8.10
5469500	South Henderson Creek at Biggsville	82.90	0	0.0	0.0			0.00
5474500	Mississippi River at Keokuk	119,000.00			15,170.0			15,260.00
5495500	Bear Creek near Marcelline	349.00	0	0.0	0.0			0.05
5502020	Hadley Creek near Barry	40.90			0.0			0.00
5502040	Hadley Creek at Kinderhook	72.70	0	0.0	0.0			0.00
5512500	Bay Creek at Pittsfield	39.40	0.00021	0.0	0.0			0.00
5513000	Bay Creek at Nebo	161.00	0.0003	0.0	0.0			0.20
5519500	West Creek near Schneider, IN	54.70			4.4				6.30
5520000	Singleton Ditch at Illinoi	220.00			12.7				21.70
5520500	Kankakee River at Momence	2,294.00	0.016	36.7	411.0				426.00
5525000	Iroquois River at Iroquois	686.00	0.021	14.4	9.1				15.00
5525500	Sugar Creek at Milford	446.00	0.009	4.0	3.5				3.60
5526000	Iroquois River near Chebanse	2,091.00	0.01	20.9	16.6				30.00
5526500	Terry Creek near Custer Park	12.10	0	0.0	0.0				0.03
5527500	Kankakee River near Wilmington	5,150.00	0.08	412.0	451.0	480.00			480.00	496.00
5527800	Des Plaines River at Russell	123.00			0.0	0.20				0.40
5528000	Des Plaines River near Gurnee	232.00	0	0.0	0.1	32.00				37.00
5528500	Buffalo Creek near Wheeling	19.60			0.2	0.00				0.30
5529000	Des Plaines River near Des Plaines	360.00	0.05	18.0	4.3	40.90				55.00
5529500	Mc Donald Creek near Mount Prospect	7.90			0.0	0.00				0.00
5530000	Weller Creek at Des Plaines	13.20	0.085	1.1	0.0	0.00				0.10
5530500	Willow Creek near Park Ridge	19.70	0.0014	0.0	0.0	31.00				40.00
5530990	Salt Creek at Rolling Meadows	30.50								0.20
5531500	Salt Creek at Western Springs	114.00	0	0.0	14.9	36.00				38.00
5532000	Addison Creek at Bellwood	17.90			1.8	2.90				2.20
5532500	Des Plaines River at Riverside	630.00	0.005	3.2	18.4	113.00				139.00
5533000	Flag Creek near Willow Springs	16.50			2.5	7.40				9.00
5534500	North Branch Chicago River at Deerfield	19.70			0.0	0.00				0.30
5535000	Skokie River at Lake Forest	13.00			1.3	0.30				0.40
5535070	Skokie River near Highland Park	21.10			1.3	0.60				0.70
5535500	West Fk Of N Br Chicago River at Northbrook	11.50			1.4	2.20				2.70
5536000	North Branch Chicago River at Niles	100.00	0.01	1.0	7.6	16.50				17.00
5536105	Nb Chicago River at Albany Avenue at Chicago	113.00
5536195	Little Calumet River at Munster Lansing STP	90.00			5.7	5.70				6.90
5536210	Thorn Creek near Chicago Heights	17.20			0.5	0.30				0.30
5536215	Thorn Creek at Glenwood	24.70	0.34	8.4	14.0	14.00				16.00
5536235	Deer Creek near Chicago Heights	23.10	0.0034	0.1	3.0	0.30				0.23
5536255	Butterfield Creek at Flossmoor	23.50	0.0028	0.1	1.0	0.00				0.00
5536265	Lansing Ditch near Lansing	8.80	0.0056	0.0	0.0	0.20				0.20
5536270	North Creek near Lansing	16.80	0.0018	0.0	0.1	1.00				1.40
5536275	Thorn Creek at Thornton	104.00	0.073	7.6	21.3	19.60				20.50
5536290	Little Calumet River at South Holland	205.00	10.3	2111.5	34.0	31.60				29.00
5536340	Midlothian Creek at Oak Forest	12.60	0.0025	0.0	0.0	0.00				0.25
5536500	Tinley Creek near Palos Park	11.20			0.0	0.00				0.00
5536995	Chicago Sanitary & Ship Canal at Romeoville	739.00
5537000	Chicago Sanitary & Ship Canal at Lockport	739.00			1,700.0	1,700.00				1,755.00
5537500	Long Run near Lemont	20.90			0.0	0.30				0.40
5539000	Hickory Creek at Joliet	107.00	0.028	3.0	1.9	3.00				4.00
5539900	West Branch Du Page River near West Chicago	28.50			3.2	10.40				9.00
5540060	Kress Creek at West Chicago	18.10
5540091	Spring Brook at Forest Preserve near Warrenville	6.83
5540095	West Branch Du Page River near Warrenville	90.40			13.6	23.00				20.00
5540130	West Branch Du Page River near Naperville	123.00
5540160	East Branch Du Page River near Downers Grove	26.60
5540195	St. Joseph Creek at Route 34 at Lisle	11.10
5540250	East Branch Du Page River at Bolingbrook	75.80
5540275	Spring Brook at 87th Street near Naperville	9.90
5540500	Du Page River at Shorewood	324.00	0.051	16.5	45.0	78.00				87.00
5542000	Mazon River near Coal City	455.00	0	0.0	0.0				0.20
5543500	Illinois River at Marseilles	8,259.00			3,240.0	3,200.00			3,180.00	3,185.00
5546500	Fox River at Wilmot	868.00			62.0	67.00				73.00
5547350	Grass Lake Outlet at Lotus Woods	919.00
5547755	Squaw Creek at Round Lake	17.20
5548280	Nippersink Creek near Spring Grove	192.00			18.6	21.60				21.60
5548500	Fox River at Johnsburg	1,205.00
5549000	Boone Creek near McHenry	15.50	0.25	3.9	3.7	3.70				3.70
5550000	Fox River at Algonquin	1,403.00	0.033	46.3	51.0					115.00
5550500	Poplar Creek at Elgin	35.20			1.0	0.50				0.50
5551000	Fox River at South Elgin	1,556.00
5551200	Ferson Creek near St. Charles	51.70			0.2	0.36				1.00
5551700	Blackberry Creek near Yorkville	70.20			2.5	3.40				4.50
5552500	Fox River at Dayton	2,642.00	0.063	166.4	198.0	236.00				260.00
5554000	N Fork Vermilion R. near Charlotte	186.00	0	0.0	0.0				0.00
5554500	Vermilion River at Pontiac	579.00	0.0003	0.2	0.2				1.20
5555300	Vermilion River near Leonore	1,251.00
5555500	Vermilion River at Lowell	1,278.00	0.0065	8.3	7.3				6.60
5556500	Big Bureau Creek at Princeton	196.00	0.0018	0.4	0.9			0.90
5557000	West Bureau Creek at Wyanet	86.70	0	0.0	0.0			0.00
5557500	East Bureau Creek near Bureau	99.00	0	0.0	0.0			0.00
5558000	Bureau Creek at Bureau	485.00	0.04	19.4	16.9			31.00
5558500	Crow Creek near Henry	56.20	0.00025	0.0	0.0			0.00
5559000	Gimlet Creek at Sparland	5.70	0.00039	0.0	0.0			0.00
5559500	Crow Creek near Washburn	115.00			0.0				0.00
5560500	Farm Creek at Farmdale	27.40	0.00022	0.0	0.0				0.00
5561000	Ackerman Creek at Farmdale	11.20			0.0				0.00
5561500	Fondulac Creek near East Peoria	5.54			0.0				0.00
5562000	Farm Creek at East Peoria	61.20	0.00011	0.0	0.0				0.00
5563000	Kickapoo Creek at Kickapoo	119.00	0.0073	0.9	0.5			0.53
5563500	Kickapoo Creek at Peoria	297.00	0.01	3.0	1.0			1.10
5564400	Money Creek near Towanda	49.00			0.0				0.00
5564500	Money Creek above Lake Bloomington	53.10	0	0.0	0.0				0.00
5565000	Hickory Creek above Lake Bloomington	9.81	0	0.0	0.0				0.00
5566000	East Branch Panther Creek near Gridley	6.30	0	0.0	0.0				0.00
5566500	East Branch Panther Creek at El Paso	30.50	0	0.0	0.0				0.00
5567000	Panther Creek near  El Paso	93.90	0.0005	0.0	0.0				0.00
5567500	Mackinaw River near Congerville	767.00	0.0043	3.3	0.5				1.20
5568000	Mackinaw River near Green Valley	1,089.00	0.021	22.9	25.2				25.20
5568500	Illinois River at Kingston Mines	15,819.00	0.015	237.3	3,000.0			3,050.00	3,050.00
5568800	Indian Creek near Wyoming	62.70			0.1			0.20
5569500	Spoon River at London Mills	1,072.00			9.8			10.40
5570000	Spoon River at Seville	1,636.00	0.012	19.6	19.0			22.00
5570910	Sangamon River at Fisher	240.00							0.03
5571000	Sangamon River near Mahomet	362.00	0.0023	0.8	0.4				0.45
5571500	Goose Creek near DeLand	47.90			0.0				0.00
5572000	Sangamon River at Monticello	550.00	0.0048	2.6	2.1				1.90
5572450	Friends Creek at Argenta	111.00			0.0				0.00
5572500	Sangamon River near Oakley	774.00							5.80
5573540	Sangamon River at Route 48 at Decatur	938.00
5574000	South Fork Sangamon River near Nokomis	11.00			0.0				0.00
5574500	Flat Branch near Taylorville	276.00	0	0.0	0.0				0.00
5575500	South Fork Sangamon River at Kincaid	562.00	0.00044	0.2	0.8				1.50
5575800	Horse Creek at Pawnee	52.20			0.0				0.00
5576000	South Fork Sangamon River near Rochester	867.00	0.00035	0.3	0.8				0.89
5576500	Sangamon River at Riverton	2,618.00	0.0075	19.6	37.2				59.50
5577500	Spring Creek at Springfield	107.00	0	0.0	0.0				0.00
5578500	Salt Creek near Rowell	335.00	0.0088	2.9	2.2				6.40
5579500	Lake Fork near Cornland	214.00	0.0087	1.9	2.0				2.40
5580000	Kickapoo Creek at Waynesville	227.00	0.0029	0.7	0.5				1.20
5580500	Kickapoo Creek near Lincoln	306.00	0.0085	2.6	2.5				3.20
5580950	Sugar Creek near Bloomington	34.40							15.60
5581500	Sugar Creek near Hartsburg	333.00	0.02	6.7	11.9				15.70
5582000	Salt Creek near Greenview	1,804.00	0.035	63.1	68.6				86.00
5582500	Crane Creek near Easton	26.50	0	0.0	0.9				0.89
5583000	Sangamon River near Oakford	5,093.00	0.027	137.5	206.0				238.00
5584400	Drowning Fork at Bushnell	26.30			0.0			0.00
5584500	La Moine River at Colmar	655.00	0.0025	1.6	0.8			2.00
5585000	La Moine River at Ripley	1,293.00	0.008	10.3	9.0			11.00
5585500	Illinois River at Meredosia	26,028.00			3,500.0			3,700.00
5586000	N Fork Mauvaise Terre Creek near Jacksonville	29.10			0.0			0.00
5586100	Illinois River at Valley City	26,743.00
5586500	Hurricane Creek near Roodhouse	2.30			0.0			0.00
5586800	Otter Creek near Palmyra	61.10			0.0			0.00
5587000	Macoupin Creek near Kane	868.00	0.0011	1.0	2.0			2.40
5587060	Illinois River at Hardin	28,690.00
5587500	Mississippi River at Alton	171,500.00			21,470.0			21,490.00
5587900	Cahokia Creek at Edwardsville	212.00						0.47
5588000	Indian Creek at Wanda	36.70	0.0035	0.1	0.0			0.00
5589500	Canteen Creek at Caseyville	22.60			0.1			0.00
5590000	Kaskaskia Ditch at Bondville	12.40	0.0025	0.0	0.1			0.05
5590400	Kaskaskia River near Pesotum	109.00						13.00
5590800	Lake Fork at Atwood	149.00						0.00
5591200	Kaskaskia River at Cooks Mills	473.00						10.30
5591500	Asa Creek at Sullivan	8.05	0	0.0	0.0			0.00
5591550	Whitley Creek near Allenville	34.60						0.00
5591700	West Okaw River near Lovington	112.00						0.00
5592000	Kaskaskia River at Shelbyville	1,054.00	0.0002	0.2	10.0			10.00
5592050	Robinson Creek near Shelbyville	93.10						0.00
5592100	Kaskaskia River near Cowden	1,330.00						17.00
5592300	Wolf Creek near Beecher City	47.90			0.0			0.00
5592500	Kaskaskia River at Vandalia	1,940.00	0.0075	14.6	25.7			39.00
5592800	Hurricane Creek near Mulberry Grove	152.00						0.20
5592900	Ef Kaskaskia River near Sandoval (Fairman)	113.00						0.00
5593000	Kaskaskia River at Carlyle	2,719.00	0.0008	2.2	50.0			50.00
5593520	Crooked Creek near Hoffman	254.00						2.00
5593575	Little Crooked Creek near New Minden	84.30			0.0			0.00
5593600	Blue Grass Creek near Raymond	17.30			0.0			0.00
5593900	East Fork Shoal Creek near Coffeen	55.50			0.0			0.00
5594000	Shoal Creek near Breese	735.00	0.0029	2.1	0.2			1.90
5594090	Sugar Creek at Albers	124.00						0.21
5594100	Kaskaskia River near Venedy Station	4,393.00						68.00
5594330	Mud Creek near Marissa	72.40						0.00
5594450	Silver Creek near Troy	154.00			0.0			0.10
5594800	Silver Creek near Freeburg	464.00						1.00
5595000	Kaskaskia River at New Athens	5,181.00	0.0013	6.7	93.0			99.00
5595200	Richland Creek near Hecker	129.00						5.00
5595270	Plum Creek Tributary near Tilden	0.59						0.00
5595500	Marys River near Sparta	17.80	0	0.0					0.00
5595730	Rayse Creek near Waltonville	88.00
5595800	Sevenmile Creek near Mt. Vernon	21.10			0.0				0.00
5595820	Casey Fork at Mt. Vernon	76.90
5596000	Big Muddy River near Benton	502.00	0.00025	0.1	30.6				32.00
5596500	Tilley Creek near West Frankfort	3.87			0.0				0.00
5597000	Big Muddy River at Plumfield	753.00	0	0.0	31.0				37.00
5597500	Crab Orchard Creek near Marion	31.70			0.0				0.00
5598500	Beaucoup Creek near Pinckneyville	231.00			0.0				0.00
5599000	Beaucoup Creek near Matthews	292.00	0	0.0	0.0				0.00
5599500	Big Muddy River at Murphysboro (BASE)	2,170.00			35.2				55.00
5600000	Big Creek near Wetaug	32.20			0.0				0.00
7010000	Mississippi River at St. Louis, MO	697,000.00			45,970.0			46,500.00
7020500	Mississippi River at Chester	708,600.00			46,840.0			47,600.00	47,600.00
7022000	Mississippi River at Thebes	713,200.00			47,810.0				48,610.00