05444000 DATA: Discharge Tables, 2004

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 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	25	25	31	e36	52	121	63	511	96	63	54
2	24	32	25	32	e37	55	112	60	236	92	61	52
3	25	48	25	33	e37	50	105	57	190	91	62	51
4	25	48	26	30	e37	49	97	56	166	112	77	49
5	26	41	28	30	e36	195	93	55	153	114	73	48

6	25	36	28	e28	e34	137	89	54	144	122	63	47
7	25	30	27	e27	e29	99	86	53	135	98	61	46
8	25	28	27	e28	27	83	82	52	127	91	59	46
9	24	28	29	e28	26	75	77	52	120	101	57	45
10	25	28	95	e28	e25	70	74	52	119	160	57	45

11	25	31	131	e28	e25	66	72	52	149	110	56	45
12	26	31	82	e28	e25	57	70	52	185	99	55	43
13	26	28	e60	e28	e25	61	68	56	164	110	54	42
14	31	27	e50	e28	e25	58	67	59	142	114	53	42
15	30	29	e42	e28	e25	55	66	59	147	91	51	43

16	28	31	e36	30	e25	54	65	55	126	86	51	43
17	26	28	e33	29	25	56	63	55	120	87	53	43
18	26	33	e33	33	27	54	61	122	114	82	54	42
19	26	32	e33	e32	26	55	60	116	108	78	54	41
20	26	31	e33	e33	81	54	61	103	104	86	51	40

21	25	29	e32	31	139	52	81	93	212	86	49	40
22	25	28	e31	e30	108	51	75	215	328	93	48	40
23	25	30	e30	e30	403	51	68	336	160	81	47	40
24	26	29	e28	31	177	85	67	256	138	75	54	39
25	28	29	e28	e30	77	127	72	179	128	72	59	39

26	27	28	e30	e29	62	167	68	154	120	70	55	39
27	26	28	33	e30	55	195	64	139	112	69	60	39
28	26	27	34	e32	49	157	62	127	109	68	78	39
29	26	26	34	e33	48	152	61	116	104	67	78	38
30	26	26	32	e34	---	141	60	287	99	66	66	39

31	26	---	31	e35	---	130	---	533	---	65	58	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2004, BY WATER YEAR (WY)
MEAN	66.4	71.7	73.7	95.7	150	176	126	128	145	93.7	74.6	66.5
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 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1940 - 2004
ANNUAL TOTAL	15128		25074
ANNUAL MEAN	41.4		68.5		105
HIGHEST ANNUAL MEAN					275	1973
LOWEST ANNUAL MEAN					30.7	1940
HIGHEST DAILY MEAN	406	May 20	533	May 31	5430	Apr 21 1973
LOWEST DAILY MEAN	23	A	24	Oct 1,2,9	10	Dec 10 1958
ANNUAL SEVEN-DAY MINIMUM	23	Sep 5	25	Oct 1	10	Dec 9 1958
MAXIMUM PEAK FLOW			1070	May 31	7330 B	Jun 4 2002
MAXIMUM PEAK STAGE			6.56	May 31	17.75 C	Jan 5 1946
INSTANTANEOUS LOW FLOW			23	Oct 9,Dec 2,3	1.9 D	Jan 3 1976
ANNUAL RUNOFF (CFSM)	0.284		0.469		0.721
ANNUAL RUNOFF (INCHES)	3.85		6.39		9.79
10 PERCENT EXCEEDS	60		130		176
50 PERCENT EXCEEDS	37		52		64
90 PERCENT EXCEEDS	25		26		26

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	25	25	31	e36	52	121	63	511	96	63	54
2	24	32	25	32	e37	55	112	60	236	92	61	52
3	25	48	25	33	e37	50	105	57	190	91	62	51
4	25	48	26	30	e37	49	97	56	166	112	77	49
5	26	41	28	30	e36	195	93	55	153	114	73	48

6	25	36	28	e28	e34	137	89	54	144	122	63	47
7	25	30	27	e27	e29	99	86	53	135	98	61	46
8	25	28	27	e28	27	83	82	52	127	91	59	46
9	24	28	29	e28	26	75	77	52	120	101	57	45
10	25	28	95	e28	e25	70	74	52	119	160	57	45

11	25	31	131	e28	e25	66	72	52	149	110	56	45
12	26	31	82	e28	e25	57	70	52	185	99	55	43
13	26	28	e60	e28	e25	61	68	56	164	110	54	42
14	31	27	e50	e28	e25	58	67	59	142	114	53	42
15	30	29	e42	e28	e25	55	66	59	147	91	51	43

16	28	31	e36	30	e25	54	65	55	126	86	51	43
17	26	28	e33	29	25	56	63	55	120	87	53	43
18	26	33	e33	33	27	54	61	122	114	82	54	42
19	26	32	e33	e32	26	55	60	116	108	78	54	41
20	26	31	e33	e33	81	54	61	103	104	86	51	40

21	25	29	e32	31	139	52	81	93	212	86	49	40
22	25	28	e31	e30	108	51	75	215	328	93	48	40
23	25	30	e30	e30	403	51	68	336	160	81	47	40
24	26	29	e28	31	177	85	67	256	138	75	54	39
25	28	29	e28	e30	77	127	72	179	128	72	59	39

26	27	28	e30	e29	62	167	68	154	120	70	55	39
27	26	28	33	e30	55	195	64	139	112	69	60	39
28	26	27	34	e32	49	157	62	127	109	68	78	39
29	26	26	34	e33	48	152	61	116	104	67	78	38
30	26	26	32	e34	---	141	60	287	99	66	66	39

31	26	---	31	e35	---	130	---	533	---	65	58	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	25	25	31	e36	52	121	63	511	96	63	54
2	24	32	25	32	e37	55	112	60	236	92	61	52
3	25	48	25	33	e37	50	105	57	190	91	62	51
4	25	48	26	30	e37	49	97	56	166	112	77	49
5	26	41	28	30	e36	195	93	55	153	114	73	48

6	25	36	28	e28	e34	137	89	54	144	122	63	47
7	25	30	27	e27	e29	99	86	53	135	98	61	46
8	25	28	27	e28	27	83	82	52	127	91	59	46
9	24	28	29	e28	26	75	77	52	120	101	57	45
10	25	28	95	e28	e25	70	74	52	119	160	57	45

11	25	31	131	e28	e25	66	72	52	149	110	56	45
12	26	31	82	e28	e25	57	70	52	185	99	55	43
13	26	28	e60	e28	e25	61	68	56	164	110	54	42
14	31	27	e50	e28	e25	58	67	59	142	114	53	42
15	30	29	e42	e28	e25	55	66	59	147	91	51	43

16	28	31	e36	30	e25	54	65	55	126	86	51	43
17	26	28	e33	29	25	56	63	55	120	87	53	43
18	26	33	e33	33	27	54	61	122	114	82	54	42
19	26	32	e33	e32	26	55	60	116	108	78	54	41
20	26	31	e33	e33	81	54	61	103	104	86	51	40

21	25	29	e32	31	139	52	81	93	212	86	49	40
22	25	28	e31	e30	108	51	75	215	328	93	48	40
23	25	30	e30	e30	403	51	68	336	160	81	47	40
24	26	29	e28	31	177	85	67	256	138	75	54	39
25	28	29	e28	e30	77	127	72	179	128	72	59	39

26	27	28	e30	e29	62	167	68	154	120	70	55	39
27	26	28	33	e30	55	195	64	139	112	69	60	39
28	26	27	34	e32	49	157	62	127	109	68	78	39
29	26	26	34	e33	48	152	61	116	104	67	78	38
30	26	26	32	e34	---	141	60	287	99	66	66	39

31	26	---	31	e35	---	130	---	533	---	65	58	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	25	25	31	e36	52	121	63	511	96	63	54
2	24	32	25	32	e37	55	112	60	236	92	61	52
3	25	48	25	33	e37	50	105	57	190	91	62	51
4	25	48	26	30	e37	49	97	56	166	112	77	49
5	26	41	28	30	e36	195	93	55	153	114	73	48

6	25	36	28	e28	e34	137	89	54	144	122	63	47
7	25	30	27	e27	e29	99	86	53	135	98	61	46
8	25	28	27	e28	27	83	82	52	127	91	59	46
9	24	28	29	e28	26	75	77	52	120	101	57	45
10	25	28	95	e28	e25	70	74	52	119	160	57	45

11	25	31	131	e28	e25	66	72	52	149	110	56	45
12	26	31	82	e28	e25	57	70	52	185	99	55	43
13	26	28	e60	e28	e25	61	68	56	164	110	54	42
14	31	27	e50	e28	e25	58	67	59	142	114	53	42
15	30	29	e42	e28	e25	55	66	59	147	91	51	43

16	28	31	e36	30	e25	54	65	55	126	86	51	43
17	26	28	e33	29	25	56	63	55	120	87	53	43
18	26	33	e33	33	27	54	61	122	114	82	54	42
19	26	32	e33	e32	26	55	60	116	108	78	54	41
20	26	31	e33	e33	81	54	61	103	104	86	51	40

21	25	29	e32	31	139	52	81	93	212	86	49	40
22	25	28	e31	e30	108	51	75	215	328	93	48	40
23	25	30	e30	e30	403	51	68	336	160	81	47	40
24	26	29	e28	31	177	85	67	256	138	75	54	39
25	28	29	e28	e30	77	127	72	179	128	72	59	39

26	27	28	e30	e29	62	167	68	154	120	70	55	39
27	26	28	33	e30	55	195	64	139	112	69	60	39
28	26	27	34	e32	49	157	62	127	109	68	78	39
29	26	26	34	e33	48	152	61	116	104	67	78	38
30	26	26	32	e34	---	141	60	287	99	66	66	39

31	26	---	31	e35	---	130	---	533	---	65	58	---