05551700 DATA: Discharge Tables, 1999

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.--October 1960 to current year.

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

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

REMARKS.--Records fair except those for estimated daily discharges, which are poor. Diversion about 7 miles upstream near Jericho Rd. that crosses the watershed divide during overbank flow. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	19	55	44	e24	136	65	45	152	67	44	16	12
2	20	51	41	e23	153	65	44	129	115	45	14	11
3	26	48	40	e22	171	66	42	112	123	42	11	9.8
4	26	47	40	e21	148	60	42	102	99	40	11	9.4
5	33	44	39	e20	124	58	42	97	86	38	9.9	11

6	48	42	43	e22	108	59	41	97	77	35	9.1	9.2
7	44	41	85	e24	101	54	39	103	71	33	10	8.6
8	39	40	98	e23	94	53	40	97	67	32	11	7.6
9	33	41	76	e22	88	56	80	89	63	32	11	7.9
10	29	78	64	e22	83	52	97	84	61	38	11	6.9

11	26	169	57	e21	82	50	78	81	63	35	11	6.7
12	24	118	53	e21	107	50	65	133	66	31	13	8.1
13	22	90	50	e21	95	50	57	182	104	29	14	9.6
14	21	78	48	e21	81	49	53	151	290	27	15	9.6
15	20	67	46	e20	75	50	53	117	209	25	13	8.6

16	20	60	45	e21	72	56	125	102	137	23	11	7.7
17	35	57	44	e21	68	97	181	100	108	23	9.1	7.0
18	334	53	44	e22	63	161	133	108	89	23	8.5	7.0
19	573	51	43	e23	60	124	103	98	76	24	12	7.4
20	394	49	41	e26	57	95	86	89	65	24	12	8.2

21	163	47	39	e31	54	81	76	84	58	24	11	7.7
22	114	45	27	e90	52	71	77	84	53	24	10	6.5
23	90	45	38	e350	51	64	299	87	52	25	11	5.8
24	74	44	35	667	52	60	846	82	51	26	29	6.0
25	65	41	34	722	51	57	470	77	46	28	40	6.5

26	60	41	34	494	50	53	210	74	44	26	38	6.1
27	59	40	34	240	58	50	170	70	43	24	27	8.8
28	77	39	34	222	70	49	355	67	42	22	22	24
29	75	39	32	187	---	48	418	66	41	20	19	76
30	66	41	e22	154	---	45	210	65	39	19	16	56

31	60	---	e23	142	---	45	---	64	---	18	14	---

TOTAL	2689	1701	1393	3739	2404	1993	4577	3043	2505	899	469.6	376.7
MEAN	86.7	56.7	44.9	121	85.9	64.3	153	98.2	83.5	29.0	15.1	12.6
MAX	573	169	98	722	171	161	846	182	290	45	40	76
MIN	19	39	22	20	50	45	39	64	39	18	8.5	5.8
CFSM	1.24	.81	.64	1.72	1.22	.92	2.17	1.40	1.19	.41	.22	.18
IN.	1.42	.90	.74	1.98	1.27	1.06	2.43	1.61	1.33	.48	.25	.20

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 1999, BY WATER YEAR (WY)
MEAN	29.9	42.8	47.9	45.9	61.1	87.4	90.3	77.7	63.6	47.5	29.0	32.5
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 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1961 - 1999
ANNUAL TOTAL	24032		25789.3
ANNUAL MEAN	65.8		70.7		54.6
HIGHEST ANNUAL MEAN					97.8	1993
LOWEST ANNUAL MEAN					16.7	1977
HIGHEST DAILY MEAN	573	Oct 19	846	Apr 24	3460	Jul 19 1996
LOWEST DAILY MEAN	13	Jan 1	5.8	Sep 23	1.6	Aug 2 1991
ANNUAL SEVEN-DAY MINIMUM	14	Sep 23	6.7	Sep 20	2.1	Jul 31 1991
INSTANTANEOUS PEAK FLOW			959	Apr 24	5510 A	Jul 18 1996
INSTANTANEOUS PEAK STAGE			7.96	Apr 24	13.16 B	Jul 18 1996
INSTANTANEOUS LOW FLOW			4.3	Sep 23	.10 C	Dec 7 1962
ANNUAL RUNOFF (CFSM)	.94		1.01		.78
ANNUAL RUNOFF (INCHES)	12.73		13.67		10.56
10 PERCENT EXCEEDS	118		131		111
50 PERCENT EXCEEDS	48		48		31
90 PERCENT EXCEEDS	19		11		9.9

A - From rating curve extended above 3,900 ft³/s.
B - Backwater from debris jam.
C - Result of freeze up.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data