05551700 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05551700 BLACKBERRY CREEK NEAR YORKVILLE, IL

LOCATION.-- Lat 41°40'18", long 88°26'29", in SE1/4NW1/4 sec.21, T.37 N., R.7 E., Kendall County, Hydrologic Unit 07120007, on right bank 300 ft upstream from bridge on State Highway 47, 2.0 mi north of Yorkville, and at mile 3.3.

DRAINAGE AREA.-- 70.2 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1960 to current year.

STAGE: Water years 1994-2001.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-91.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 612.34 ft above sea level.

REMARKS.-- Diversion about 7 miles upstream near Jericho Rd. that crosses the watershed divide during overbank flow.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE -WATER DISCHARGE AND STAGE: Maximum discharge, 5,510 ft³/s, from rating curve extended above 3,900 ft³/s, July 18, 1996, gage height, 13.16 ft, backwater from debris jam; minimum, 0.10 ft³/s, Dec. 7, 1962, result of freeze up.

REMARKS FOR CURRENT YEAR.-- Records good except those for Oct.1-Mar. 12, which are fair, and those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	15	14	35	e19	e105	146	64	40	51	18	7.0	7.1
2	14	15	33	e21	e90	131	63	38	94	16	6.1	5.4
3	15	16	31	e22	e74	120	61	36	90	19	5.7	5.3
4	34	16	30	e23	e66	113	57	35	66	19	5.5	6.3
5	55	16	e27	e24	e56	104	53	33	74	18	5.0	7.9

6	48	19	e23	e25	e48	95	65	32	185	17	e4.9	8.0
7	35	78	e27	e24	e52	89	81	34	148	15	e4.6	14
8	29	107	e30	e24	61	85	76	38	114	15	e4.5	14
9	25	119	e28	e22	291	81	75	35	94	14	e4.2	9.6
10	23	229	e27	e21	492	76	72	33	74	13	e4.8	12

11	22	188	e26	e20	542	76	68	38	61	12	e4.8	13
12	21	129	e29	e20	246	79	94	42	56	11	e4.5	9.8
13	20	105	e31	e21	189	96	111	36	57	11	e4.3	8.5
14	19	84	e28	e23	178	95	88	41	49	9.8	3.6	5.8
15	18	68	e26	e26	202	104	90	39	47	9.4	4.4	8.2

16	17	59	e25	e30	186	157	107	32	44	9.8	5.4	6.3
17	17	55	e24	e36	156	155	93	31	41	9.1	5.5	6.9
18	17	49	e22	e32	140	150	83	28	36	9.2	5.7	7.7
19	16	45	e21	e27	120	137	67	25	34	8.9	4.9	124
20	16	42	e20	e22	117	124	65	24	31	8.2	5.1	137

21	18	e39	e19	e18	113	114	75	26	30	7.8	4.1	100
22	18	e37	e18	e18	102	105	70	29	32	8.1	3.8	87
23	17	e35	e17	e17	94	100	64	29	31	9.2	4.4	62
24	18	33	e16	e17	111	91	64	28	30	12	5.0	81
25	18	32	e16	e16	340	82	59	27	27	16	4.6	71

26	23	37	e15	e16	487	74	54	33	25	15	9.8	48
27	17	40	e15	e16	245	71	51	43	22	12	8.0	36
28	16	38	e15	e16	172	70	46	45	20	10	5.1	28
29	16	36	e16	e25	---	70	43	39	20	9.7	4.1	24
30	16	36	e17	e65	---	70	41	35	18	9.9	4.0	21

31	15	---	e18	e120	---	66	---	33	---	8.2	9.3	---

TOTAL	668	1816	725	826	5075	3126	2100	1057	1701	380.3	162.7	974.8
MEAN	21.5	60.5	23.4	26.6	181	101	70.0	34.1	56.7	12.3	5.25	32.5
MAX	55	229	35	120	542	157	111	45	185	19	9.8	137
MIN	14	14	15	16	48	66	41	24	18	7.8	3.6	5.3
CFSM	.31	.86	.33	.38	2.58	1.44	1.00	.49	.81	.17	.07	.46
IN.	.35	.96	.38	.44	2.69	1.66	1.11	.56	.90	.20	.09	.52

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2001, BY WATER YEAR (WY)
MEAN	29.4	42.5	46.7	44.7	63.3	86.2	89.0	75.8	63.5	47.0	28.6	32.2
MAX	126	175	217	146	202	360	249	221	197	381	172	131
(WY)	1973	1986	1983	1993	1997	1979	1979	1974	1974	1996	1987	1987
MIN	5.42	7.44	4.16	4.25	5.46	22.9	27.2	16.7	14.3	8.43	4.21	5.23
(WY)	1964	1964	1964	1977	1963	1964	1963	1989	1977	1961	1991	1976

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1961 - 2001
ANNUAL TOTAL	14302.4		18611.8
ANNUAL MEAN	39.1		51.0		54.0
HIGHEST ANNUAL MEAN					97.8	1993
LOWEST ANNUAL MEAN					16.7	1977
HIGHEST DAILY MEAN	289	Apr 21	542	Feb 11	3460	Jul 19 1996
LOWEST DAILY MEAN	9.2	Sep 7	3.6 A	Aug 14	1.6	Aug 2 1991
ANNUAL SEVEN-DAY MINIMUM	9.9	Sep 4	4.4	Aug 9	2.1	Jul 31 1991
MAXIMUM PEAK FLOW			609	Feb 11	5510 B	Jul 18 1996
MAXIMUM PEAK STAGE			7.12	Feb 11	13.16 C	Jul 18 1996
INSTANTANEOUS LOW FLOW			2.8 A	Aug 14	.10 D	Dec 7 1962
ANNUAL RUNOFF (CFSM)	.56		.73		.77
ANNUAL RUNOFF (INCHES)	7.58		9.86		10.45
10 PERCENT EXCEEDS	79		113		110
50 PERCENT EXCEEDS	26		30		31
90 PERCENT EXCEEDS	15		7.8		10

	A - May have been less during period of missing record, Aug. 6-13.
	B - From rating curve extended above 3,900 ft³/s.
	C - Backwater from debris jam.
	D - Result of freeze up.