USGS CD-ROM: Current Year Discharge

05551700 BLACKBERRY CREEK NEAR YORKVILLE, IL

LOCATION.--Lat 41°40'18", long 88°26'29", in SE¼NW¼ 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 good 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 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	e8.0	e9.0	e11	13	24	42	112	61	47	50	24	17
2	e6.5	e8.2	e11	15	39	38	129	57	46	45	22	15
3	5.5	e8.8	e12	25	62	36	107	82	46	42	23	17
4	6.6	e8.8	e11	59	61	36	86	85	46	175	59	16
5	e5.3	e11	e11	97	54	33	70	71	46	376	83	14

6	4.2	e17	e11	113	46	32	61	68	45	391	103	14
7	4.9	e13	e10	129	42	33	57	136	43	188	65	30
8	e5.2	e12	e10	131	42	39	84	354	42	267	53	32
9	e5.8	e11	e11	109	38	96	141	477	48	166	44	26
10	e5.0	e10	e15	82	35	100	141	388	93	117	38	22

11	e4.2	e10	e18	88	45	85	107	226	125	96	33	18
12	e4.0	e9.6	e17	77	103	73	85	177	261	81	28	15
13	e5.6	e9.2	16	36	99	62	73	158	209	71	25	16
14	e4.8	e9.0	13	39	81	57	69	132	135	63	24	17
15	e4.0	e10	12	40	66	52	63	114	106	57	22	22

16	e3.6	e9.0	14	34	58	48	105	103	91	53	21	23
17	e3.3	e9.0	12	29	58	56	126	92	119	50	20	21
18	e3.1	e9.0	12	24	57	134	97	85	109	48	19	19
19	e3.0	8.9	11	e22	51	226	81	79	118	45	17	17
20	e2.9	e9.2	11	e20	47	187	73	77	120	44	17	16

21	e2.8	e9.4	12	e20	45	130	107	73	93	42	17	16
22	e2.9	e9.1	12	e19	42	97	126	68	79	40	17	16
23	e3.2	e8.7	12	e19	40	82	96	65	69	38	17	15
24	e5.0	e8.6	13	e19	40	68	77	66	61	34	18	15
25	e4.0	e8.6	17	e18	38	61	66	65	55	33	20	14

26	e12	e8.6	18	e18	37	56	65	62	66	31	19	14
27	e17	e10	15	e19	41	50	81	57	69	30	19	14
28	e12	e13	15	19	45	50	80	55	60	29	22	15
29	e11	e12	17	19	---	49	70	54	56	27	23	14
30	e9.6	e12	13	21	---	45	67	51	53	26	20	16

31	e8.4	---	e12	22	---	53	---	51	---	24	18	---

TOTAL	183.4	301.7	405	1395	1436	2206	2702	3689	2556	2779	950	536
MEAN	5.92	10.1	13.1	45.0	51.3	71.2	90.1	119	85.2	89.6	30.6	17.9
MAX	17	17	18	131	103	226	141	477	261	391	103	32
MIN	2.8	8.2	10	13	24	32	57	51	42	24	17	14
CFSM	.08	.14	.19	.64	.73	1.01	1.28	1.70	1.21	1.28	.44	.25
IN.	.10	.16	.21	.74	.76	1.17	1.43	1.95	1.35	1.47	.50	.28

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 1998, BY WATER YEAR (WY)
MEAN	28.4	42.4	48.0	43.9	60.4	88.0	88.7	77.2	63.1	48.0	29.3	33.1
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 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1961 - 1998
ANNUAL TOTAL	16549.4		19139.1
ANNUAL MEAN	45.3		52.4		54.1
HIGHEST ANNUAL MEAN					97.8	1993
LOWEST ANNUAL MEAN					16.7	1977
HIGHEST DAILY MEAN	1600	Feb 22	477	May 9	3460	Jul 19 1996
LOWEST DAILY MEAN	2.8 A	Oct 21	2.8 A	Oct 21	1.6	Aug 2 1991
ANNUAL SEVEN-DAY MINIMUM	3.0	Oct 17	3.0	Oct 17	2.1	Jul 31 1991
INSTANTANEOUS PEAK FLOW			507	May 9	5510 B	Jul 18 1996
INSTANTANEOUS PEAK STAGE			6.77	May 9	13.16	Jul 18 1996
INSTANTANEOUS LOW FLOW					.10 C	Dec 7 1962
ANNUAL RUNOFF (CFSM)	.65		.75		.77
ANNUAL RUNOFF (INCHES)	8.77		10.14		10.48
10 PERCENT EXCEEDS	77		110		110
50 PERCENT EXCEEDS	19		38		31
90 PERCENT EXCEEDS	8.1		9.0		9.9

A - Estimated due to beaver dam.
B - From rating curve extended above 3,900 ft³/s, backwater from debris jam.
C - Result of freezeup.