05444000 DATA: Discharge Tables, 2003

Station list Available data
ROCK RIVER BASIN


LOCATION.-- Lat 41°54'10", long 89°41'46" (NAD of 1927), in SW1/4SE1/4 sec.9, T.22 N., R.7 E., Whiteside County, Hydrologic Unit 07090005, on left bank 50 ft upstream from bridge on County Road 2200 N, 2 mi northwest of Penrose, 2.2 mi downstream from Buffalo Creek, 5 mi upstream from Sugar Creek, and at mile 17.5.

DRAINAGE AREA.-- 146 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1939 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1979-91.

REVISED RECORDS.-- WSP 925: 1940. WSP 955: 1941. WSP 1175: 1941(P), 1948(P). WSP 1308: 1950(M). WDR IL-72-1: Drainage area.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 657.85 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Apr. 6, 1940, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,330 ft³/s, June 4, 2002, gage height, 17.42 ft; maximum gage height, 17.75 ft, Jan. 5, 1946; minimum discharge, 1.9 ft³/s, Jan. 3, 1976, result of freezeup.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of June 1938 reached a stage of 19.6 ft, from U.S. Army Corps of Engineers high-water mark.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	62	60	e52	43	e39	e33	46	64	55	41	35	27
2	79	60	e52	43	e39	e33	44	64	52	41	34	26
3	74	61	e49	41	e38	e33	44	55	53	40	35	25
4	95	61	e48	45	e37	e34	46	55	52	40	36	24
5	102	62	e47	46	e35	e34	48	87	49	42	37	24

6	76	63	e47	43	e34	e34	45	88	50	44	36	23
7	70	61	e46	43	e33	e35	46	72	50	42	34	23
8	68	62	e44	46	e33	e36	45	67	52	46	32	23
9	66	64	e43	45	e34	37	43	80	49	65	31	23
10	65	65	e45	37	e34	46	43	81	47	69	31	23

11	64	63	51	e41	e34	41	44	83	45	51	30	23
12	64	60	52	e41	e34	61	43	75	45	48	30	25
13	63	59	51	e41	e35	97	42	67	45	44	29	34
14	64	61	50	e41	e36	75	42	67	44	51	29	37
15	64	59	50	e40	e36	73	41	92	43	50	29	31

16	64	57	48	e39	e37	58	40	80	42	46	29	27
17	64	57	48	e38	e37	54	40	71	41	41	28	25
18	65	58	56	e37	e36	51	40	66	42	40	28	26
19	64	59	63	e36	e34	49	42	65	43	38	27	28
20	63	59	56	e36	e34	49	53	406	43	37	27	25

21	63	58	51	e35	e35	49	58	129	40	154	28	27
22	62	56	49	e36	e35	47	49	96	39	55	26	27
23	61	56	41	e38	e36	44	45	87	39	43	26	24
24	63	56	50	e38	e37	44	44	79	38	41	26	24
25	69	55	49	e38	e39	47	42	71	41	40	25	23

26	69	53	45	e38	e36	46	40	65	58	39	25	24
27	65	52	47	e38	e34	44	40	63	51	38	25	24
28	63	55	47	e39	e34	49	39	62	44	38	25	24
29	63	57	46	e39	---	55	39	59	46	38	25	24
30	62	55	48	e39	---	50	52	58	44	38	24	23

31	61	---	46	e39	---	47	---	58	---	36	26	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2003, BY WATER YEAR (WY)
MEAN	67.0	72.3	74.2	96.7	151	177	127	128	144	93.7	74.8	66.8
MAX	280	314	267	580	556	588	618	607	560	401	422	225
(WY)	1982	1986	1973	1969	1951	1993	1973	1974	1993	1951	1972	1972
MIN	15.6	17.6	15.4	14.6	22.3	33.6	34.7	25.7	25.8	19.2	23.0	14.7
(WY)	1958	1950	1959	1959	1964	1956	1957	1940	1957	1940	1963	1957

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1940 - 2003
ANNUAL TOTAL	45393		17566
ANNUAL MEAN	124		48.1		106
HIGHEST ANNUAL MEAN					275	1973
LOWEST ANNUAL MEAN					30.7	1940
HIGHEST DAILY MEAN	4460 A	Jun 4	406	May 20	5430	Apr 21 1973
LOWEST DAILY MEAN	41	Dec 23	23	B	10	Dec 10 1958
ANNUAL SEVEN-DAY MINIMUM	46	Dec 4	23	Sep 5	10	Dec 9 1958
MAXIMUM PEAK FLOW			594	May 20	7330 C	Jun 4 2002
MAXIMUM PEAK STAGE			5.08	May 20	17.75 D	Jan 5 1946
INSTANTANEOUS LOW FLOW			5.1 E	Jan 10	1.9 E	Jan 3 1976
ANNUAL RUNOFF (CFSM)	0.85		0.33		0.72
ANNUAL RUNOFF (INCHES)	11.57		4.48		9.85
10 PERCENT EXCEEDS	157		65		177
50 PERCENT EXCEEDS	82		44		64
90 PERCENT EXCEEDS	56		27		26

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	62	60	e52	43	e39	e33	46	64	55	41	35	27
2	79	60	e52	43	e39	e33	44	64	52	41	34	26
3	74	61	e49	41	e38	e33	44	55	53	40	35	25
4	95	61	e48	45	e37	e34	46	55	52	40	36	24
5	102	62	e47	46	e35	e34	48	87	49	42	37	24

6	76	63	e47	43	e34	e34	45	88	50	44	36	23
7	70	61	e46	43	e33	e35	46	72	50	42	34	23
8	68	62	e44	46	e33	e36	45	67	52	46	32	23
9	66	64	e43	45	e34	37	43	80	49	65	31	23
10	65	65	e45	37	e34	46	43	81	47	69	31	23

11	64	63	51	e41	e34	41	44	83	45	51	30	23
12	64	60	52	e41	e34	61	43	75	45	48	30	25
13	63	59	51	e41	e35	97	42	67	45	44	29	34
14	64	61	50	e41	e36	75	42	67	44	51	29	37
15	64	59	50	e40	e36	73	41	92	43	50	29	31

16	64	57	48	e39	e37	58	40	80	42	46	29	27
17	64	57	48	e38	e37	54	40	71	41	41	28	25
18	65	58	56	e37	e36	51	40	66	42	40	28	26
19	64	59	63	e36	e34	49	42	65	43	38	27	28
20	63	59	56	e36	e34	49	53	406	43	37	27	25

21	63	58	51	e35	e35	49	58	129	40	154	28	27
22	62	56	49	e36	e35	47	49	96	39	55	26	27
23	61	56	41	e38	e36	44	45	87	39	43	26	24
24	63	56	50	e38	e37	44	44	79	38	41	26	24
25	69	55	49	e38	e39	47	42	71	41	40	25	23

26	69	53	45	e38	e36	46	40	65	58	39	25	24
27	65	52	47	e38	e34	44	40	63	51	38	25	24
28	63	55	47	e39	e34	49	39	62	44	38	25	24
29	63	57	46	e39	---	55	39	59	46	38	25	24
30	62	55	48	e39	---	50	52	58	44	38	24	23

31	61	---	46	e39	---	47	---	58	---	36	26	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	62	60	e52	43	e39	e33	46	64	55	41	35	27
2	79	60	e52	43	e39	e33	44	64	52	41	34	26
3	74	61	e49	41	e38	e33	44	55	53	40	35	25
4	95	61	e48	45	e37	e34	46	55	52	40	36	24
5	102	62	e47	46	e35	e34	48	87	49	42	37	24

6	76	63	e47	43	e34	e34	45	88	50	44	36	23
7	70	61	e46	43	e33	e35	46	72	50	42	34	23
8	68	62	e44	46	e33	e36	45	67	52	46	32	23
9	66	64	e43	45	e34	37	43	80	49	65	31	23
10	65	65	e45	37	e34	46	43	81	47	69	31	23

11	64	63	51	e41	e34	41	44	83	45	51	30	23
12	64	60	52	e41	e34	61	43	75	45	48	30	25
13	63	59	51	e41	e35	97	42	67	45	44	29	34
14	64	61	50	e41	e36	75	42	67	44	51	29	37
15	64	59	50	e40	e36	73	41	92	43	50	29	31

16	64	57	48	e39	e37	58	40	80	42	46	29	27
17	64	57	48	e38	e37	54	40	71	41	41	28	25
18	65	58	56	e37	e36	51	40	66	42	40	28	26
19	64	59	63	e36	e34	49	42	65	43	38	27	28
20	63	59	56	e36	e34	49	53	406	43	37	27	25

21	63	58	51	e35	e35	49	58	129	40	154	28	27
22	62	56	49	e36	e35	47	49	96	39	55	26	27
23	61	56	41	e38	e36	44	45	87	39	43	26	24
24	63	56	50	e38	e37	44	44	79	38	41	26	24
25	69	55	49	e38	e39	47	42	71	41	40	25	23

26	69	53	45	e38	e36	46	40	65	58	39	25	24
27	65	52	47	e38	e34	44	40	63	51	38	25	24
28	63	55	47	e39	e34	49	39	62	44	38	25	24
29	63	57	46	e39	---	55	39	59	46	38	25	24
30	62	55	48	e39	---	50	52	58	44	38	24	23

31	61	---	46	e39	---	47	---	58	---	36	26	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	62	60	e52	43	e39	e33	46	64	55	41	35	27
2	79	60	e52	43	e39	e33	44	64	52	41	34	26
3	74	61	e49	41	e38	e33	44	55	53	40	35	25
4	95	61	e48	45	e37	e34	46	55	52	40	36	24
5	102	62	e47	46	e35	e34	48	87	49	42	37	24

6	76	63	e47	43	e34	e34	45	88	50	44	36	23
7	70	61	e46	43	e33	e35	46	72	50	42	34	23
8	68	62	e44	46	e33	e36	45	67	52	46	32	23
9	66	64	e43	45	e34	37	43	80	49	65	31	23
10	65	65	e45	37	e34	46	43	81	47	69	31	23

11	64	63	51	e41	e34	41	44	83	45	51	30	23
12	64	60	52	e41	e34	61	43	75	45	48	30	25
13	63	59	51	e41	e35	97	42	67	45	44	29	34
14	64	61	50	e41	e36	75	42	67	44	51	29	37
15	64	59	50	e40	e36	73	41	92	43	50	29	31

16	64	57	48	e39	e37	58	40	80	42	46	29	27
17	64	57	48	e38	e37	54	40	71	41	41	28	25
18	65	58	56	e37	e36	51	40	66	42	40	28	26
19	64	59	63	e36	e34	49	42	65	43	38	27	28
20	63	59	56	e36	e34	49	53	406	43	37	27	25

21	63	58	51	e35	e35	49	58	129	40	154	28	27
22	62	56	49	e36	e35	47	49	96	39	55	26	27
23	61	56	41	e38	e36	44	45	87	39	43	26	24
24	63	56	50	e38	e37	44	44	79	38	41	26	24
25	69	55	49	e38	e39	47	42	71	41	40	25	23

26	69	53	45	e38	e36	46	40	65	58	39	25	24
27	65	52	47	e38	e34	44	40	63	51	38	25	24
28	63	55	47	e39	e34	49	39	62	44	38	25	24
29	63	57	46	e39	---	55	39	59	46	38	25	24
30	62	55	48	e39	---	50	52	58	44	38	24	23

31	61	---	46	e39	---	47	---	58	---	36	26	---