USGS CD-ROM: Current Year Discharge

05444000 ELKHORN CREEK NEAR PENROSE, IL

LOCATION.--Lat 41°54'10", long 89°41'40", in SW¼SE¼ 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.--October 1939 to current year.

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. Datum of gage is 657.85 ft above sea level (levels by U.S. Army Corps of Engineers). Prior to Apr. 6, 1940, nonrecording gage at same site and datum.

REMARKS.--Records good except those for Oct.1 - Nov. 4 and Aug. 1-3, 12-24, which are fair, and those for estimated daily discharges, which are poor. Gage-height telemeter at station.

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

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	43	46	45	e41	46	127	481	186	128	185	88	92
2	43	45	45	43	53	114	303	183	126	173	88	88
3	43	45	45	54	55	113	252	176	122	165	85	87
4	43	45	45	95	58	105	223	167	121	188	104	85
5	43	44	45	104	58	96	202	160	120	164	151	82

6	43	49	43	99	57	93	188	159	118	159	113	81
7	43	52	45	111	55	90	184	219	117	169	104	79
8	43	50	44	111	55	135	218	284	116	176	100	77
9	43	46	44	93	55	217	304	244	185	152	94	76
10	43	46	45	78	54	155	276	218	340	147	92	75

11	43	45	45	e62	74	138	236	204	350	142	87	74
12	43	45	44	e55	151	135	218	192	424	138	84	73
13	45	45	41	e59	131	127	245	190	270	134	83	72
14	45	45	40	e65	113	112	419	184	236	130	83	104
15	45	46	42	e60	105	108	307	181	228	127	82	159

16	44	45	45	e57	98	106	344	179	205	121	81	116
17	44	43	42	e54	97	107	301	161	453	118	80	99
18	44	45	44	e53	93	133	262	158	309	117	81	93
19	44	44	43	e52	85	140	240	154	771	121	79	88
20	44	44	43	e51	83	136	233	152	318	123	78	86

21	44	45	43	50	79	126	266	150	399	116	79	85
22	43	45	43	49	78	119	260	147	311	115	79	82
23	43	43	43	48	76	112	235	147	258	115	79	79
24	44	40	43	47	75	108	220	150	233	113	89	78
25	45	45	43	46	72	108	207	147	215	110	290	80

26	45	45	44	46	71	108	215	142	198	106	139	79
27	45	45	40	46	120	107	212	138	188	102	101	77
28	45	45	e47	45	150	108	193	136	246	100	173	75
29	45	44	e41	45	---	109	189	144	227	96	139	77
30	45	45	e40	46	---	109	188	140	197	93	107	79

31	45	---	e40	46	---	332	---	136	---	90	97	---

TOTAL	1360	1357	1342	1911	2297	3933	7621	5328	7529	4105	3209	2577
MEAN	43.9	45.2	43.3	61.6	82.0	127	254	172	251	132	104	85.9
MAX	45	52	47	111	151	332	481	284	771	188	290	159
MIN	43	40	40	41	46	90	184	136	116	90	78	72
CFSM	.30	.31	.30	.42	.56	.87	1.74	1.18	1.72	.91	.71	.59
IN.	.35	.35	.34	.49	.59	1.00	1.94	1.36	1.92	1.05	.82	.66

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 1998, BY WATER YEAR (WY)
MEAN	63.3	70.5	74.1	98.0	152	182	124	126	133	91.0	74.6	66.7
MAX	280	314	267	580	556	588	619	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 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1940 - 1998
ANNUAL TOTAL	42340		42569
ANNUAL MEAN	116		117		104
HIGHEST ANNUAL MEAN					275	1973
LOWEST ANNUAL MEAN					30.7	1940
HIGHEST DAILY MEAN	4750	Feb 21	771	Jun 19	5430	Apr 21 1973
LOWEST DAILY MEAN	40 A	B	40 A	B	10	Dec 10 1958
ANNUAL SEVEN-DAY MINIMUM	42	Dec 25	42 C	Dec 27	10	Dec 9 1958
INSTANTANEOUS PEAK FLOW			917	Jun 19	6770 D	May 17 1974
INSTANTANEOUS PEAK STAGE			6.11	Jun 19	17.75 E	Jan 5 1946
INSTANTANEOUS LOW FLOW			27 C	Nov 24	1.9 C	Jan 3 1976
ANNUAL RUNOFF (CFSM)	.79		.80		.71
ANNUAL RUNOFF (INCHES)	10.79		10.85		9.71
10 PERCENT EXCEEDS	131		227		173
50 PERCENT EXCEEDS	76		93		62
90 PERCENT EXCEEDS	44		44		26

A - Result of freezeup Nov. 24, Dec. 14 and 27, and estimated due to backwater from ice, Dec. 30 and 31.
B - Nov. 24, Dec. 14, 27, and 30-31.
C - Result of freezeup.
D - Gage height, 16.53 ft.
E - Discharge, 5,980 ft³/s.

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	43	46	45	e41	46	127	481	186	128	185	88	92
2	43	45	45	43	53	114	303	183	126	173	88	88
3	43	45	45	54	55	113	252	176	122	165	85	87
4	43	45	45	95	58	105	223	167	121	188	104	85
5	43	44	45	104	58	96	202	160	120	164	151	82

6	43	49	43	99	57	93	188	159	118	159	113	81
7	43	52	45	111	55	90	184	219	117	169	104	79
8	43	50	44	111	55	135	218	284	116	176	100	77
9	43	46	44	93	55	217	304	244	185	152	94	76
10	43	46	45	78	54	155	276	218	340	147	92	75

11	43	45	45	e62	74	138	236	204	350	142	87	74
12	43	45	44	e55	151	135	218	192	424	138	84	73
13	45	45	41	e59	131	127	245	190	270	134	83	72
14	45	45	40	e65	113	112	419	184	236	130	83	104
15	45	46	42	e60	105	108	307	181	228	127	82	159

16	44	45	45	e57	98	106	344	179	205	121	81	116
17	44	43	42	e54	97	107	301	161	453	118	80	99
18	44	45	44	e53	93	133	262	158	309	117	81	93
19	44	44	43	e52	85	140	240	154	771	121	79	88
20	44	44	43	e51	83	136	233	152	318	123	78	86

21	44	45	43	50	79	126	266	150	399	116	79	85
22	43	45	43	49	78	119	260	147	311	115	79	82
23	43	43	43	48	76	112	235	147	258	115	79	79
24	44	40	43	47	75	108	220	150	233	113	89	78
25	45	45	43	46	72	108	207	147	215	110	290	80

26	45	45	44	46	71	108	215	142	198	106	139	79
27	45	45	40	46	120	107	212	138	188	102	101	77
28	45	45	e47	45	150	108	193	136	246	100	173	75
29	45	44	e41	45	---	109	189	144	227	96	139	77
30	45	45	e40	46	---	109	188	140	197	93	107	79

31	45	---	e40	46	---	332	---	136	---	90	97	---

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	43	46	45	e41	46	127	481	186	128	185	88	92
2	43	45	45	43	53	114	303	183	126	173	88	88
3	43	45	45	54	55	113	252	176	122	165	85	87
4	43	45	45	95	58	105	223	167	121	188	104	85
5	43	44	45	104	58	96	202	160	120	164	151	82

6	43	49	43	99	57	93	188	159	118	159	113	81
7	43	52	45	111	55	90	184	219	117	169	104	79
8	43	50	44	111	55	135	218	284	116	176	100	77
9	43	46	44	93	55	217	304	244	185	152	94	76
10	43	46	45	78	54	155	276	218	340	147	92	75

11	43	45	45	e62	74	138	236	204	350	142	87	74
12	43	45	44	e55	151	135	218	192	424	138	84	73
13	45	45	41	e59	131	127	245	190	270	134	83	72
14	45	45	40	e65	113	112	419	184	236	130	83	104
15	45	46	42	e60	105	108	307	181	228	127	82	159

16	44	45	45	e57	98	106	344	179	205	121	81	116
17	44	43	42	e54	97	107	301	161	453	118	80	99
18	44	45	44	e53	93	133	262	158	309	117	81	93
19	44	44	43	e52	85	140	240	154	771	121	79	88
20	44	44	43	e51	83	136	233	152	318	123	78	86

21	44	45	43	50	79	126	266	150	399	116	79	85
22	43	45	43	49	78	119	260	147	311	115	79	82
23	43	43	43	48	76	112	235	147	258	115	79	79
24	44	40	43	47	75	108	220	150	233	113	89	78
25	45	45	43	46	72	108	207	147	215	110	290	80

26	45	45	44	46	71	108	215	142	198	106	139	79
27	45	45	40	46	120	107	212	138	188	102	101	77
28	45	45	e47	45	150	108	193	136	246	100	173	75
29	45	44	e41	45	---	109	189	144	227	96	139	77
30	45	45	e40	46	---	109	188	140	197	93	107	79

31	45	---	e40	46	---	332	---	136	---	90	97	---

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	43	46	45	e41	46	127	481	186	128	185	88	92
2	43	45	45	43	53	114	303	183	126	173	88	88
3	43	45	45	54	55	113	252	176	122	165	85	87
4	43	45	45	95	58	105	223	167	121	188	104	85
5	43	44	45	104	58	96	202	160	120	164	151	82

6	43	49	43	99	57	93	188	159	118	159	113	81
7	43	52	45	111	55	90	184	219	117	169	104	79
8	43	50	44	111	55	135	218	284	116	176	100	77
9	43	46	44	93	55	217	304	244	185	152	94	76
10	43	46	45	78	54	155	276	218	340	147	92	75

11	43	45	45	e62	74	138	236	204	350	142	87	74
12	43	45	44	e55	151	135	218	192	424	138	84	73
13	45	45	41	e59	131	127	245	190	270	134	83	72
14	45	45	40	e65	113	112	419	184	236	130	83	104
15	45	46	42	e60	105	108	307	181	228	127	82	159

16	44	45	45	e57	98	106	344	179	205	121	81	116
17	44	43	42	e54	97	107	301	161	453	118	80	99
18	44	45	44	e53	93	133	262	158	309	117	81	93
19	44	44	43	e52	85	140	240	154	771	121	79	88
20	44	44	43	e51	83	136	233	152	318	123	78	86

21	44	45	43	50	79	126	266	150	399	116	79	85
22	43	45	43	49	78	119	260	147	311	115	79	82
23	43	43	43	48	76	112	235	147	258	115	79	79
24	44	40	43	47	75	108	220	150	233	113	89	78
25	45	45	43	46	72	108	207	147	215	110	290	80

26	45	45	44	46	71	108	215	142	198	106	139	79
27	45	45	40	46	120	107	212	138	188	102	101	77
28	45	45	e47	45	150	108	193	136	246	100	173	75
29	45	44	e41	45	---	109	189	144	227	96	139	77
30	45	45	e40	46	---	109	188	140	197	93	107	79

31	45	---	e40	46	---	332	---	136	---	90	97	---