05466000 DATA: Discharge Tables, 2004

Station list Available data
EDWARDS RIVER BASIN


LOCATION.-- Lat 41°16'19", long 90°22'39" (NAD of 1927), in NE1/4SE1/4 sec.21, T.15 N., R.1 E., Henry County, Hydrologic Unit 07080104, on left bank at downstream side of bridge on U.S. Highway 150, 1.5 mi north of Opheim, 5.5 mi south of Orion, and at mile 51.5.

DRAINAGE AREA.-- 155 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1940 to current year. Monthly discharge only for some periods, published in WSP 1308.
	STAGE: Water years 1994 to current year.

REVISED RECORDS.-- WSP 1175: 1947(P). WSP 1508: 1942. WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter and crest-stage gage. Datum of gage is 653.96 ft above NGVD of 1929 (U.S. Army Corps of Engineers bench mark). Prior to Apr. 4, 1941, and Apr. 8 to Nov. 11, 1981, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 8,910 ft³/s, Feb. 19, 1951, gage height, 13.41 ft, from floodmarks; maximum gage height, 15.52 ft, June 23, 1974, discharge, 5,760 ft³/s; minimum discharge, 0.3 ft³/s, Oct. 6, 1956.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of August 1924 reached a stage of 20.2 ft, from floodmarks.

REMARKS FOR CURRENT YEAR.-- Records good except those for June 1-4, which are fair, and 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	5.7	5.1	13	66	e47	73	165	81	561	68	22	12
2	5.9	6.9	11	66	e48	68	148	86	395	65	21	11
3	5.9	22	10	64	e50	59	135	132	324	66	20	10
4	5.6	22	10	71	e54	69	120	131	271	69	32	10
5	5.7	64	12	67	e60	381	112	117	244	65	27	9.8

6	5.5	24	13	e54	e69	236	110	107	223	81	21	9.8
7	5.3	13	11	e45	e70	177	104	467	202	63	20	11
8	5.3	9.8	11	e76	e69	139	98	307	183	58	19	8.9
9	5.5	8.7	18	e69	e65	122	89	228	168	62	17	8.8
10	5.6	7.3	1660	e67	e62	108	84	191	185	60	16	8.7

11	5.1	7.4	580	e64	e58	106	82	177	299	55	16	8.8
12	5.0	6.8	269	e62	e55	93	79	189	207	56	16	8.9
13	5.0	6.6	198	e60	e53	89	78	214	180	51	15	8.9
14	7.1	6.3	162	e58	e51	91	76	214	182	47	14	8.7
15	7.4	6.3	138	e57	e49	80	72	257	171	44	13	12

16	5.8	6.3	133	e56	e47	85	71	219	148	43	13	30
17	5.0	7.3	113	e55	e44	86	68	197	139	42	13	19
18	4.5	64	105	e68	e44	93	66	546	126	42	15	11
19	4.4	48	96	e65	e90	87	65	370	116	40	26	9.2
20	4.4	28	90	e61	e130	85	65	302	113	37	19	8.3

21	4.6	21	99	e58	e220	77	94	1260	112	35	15	7.8
22	4.7	18	88	e57	e160	75	73	793	106	39	13	7.3
23	4.8	17	84	e54	e190	76	67	614	95	36	11	7.2
24	4.9	23	79	e52	e140	82	67	373	90	33	12	7.2
25	5.3	19	77	e51	89	83	78	638	86	33	15	7.2

26	5.3	14	76	e50	78	213	69	394	81	31	18	7.3
27	5.6	13	71	e56	71	226	65	318	79	30	19	6.9
28	5.6	13	73	e54	66	192	66	263	78	28	22	6.6
29	5.1	19	74	e51	67	221	62	232	73	26	21	6.4
30	5.1	13	72	e49	---	191	71	1800	70	25	16	6.7

31	5.0	---	69	e48	---	179	---	1540	---	24	13	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2004, BY WATER YEAR (WY)
MEAN	51.8	63.3	70.4	86.1	153	175	199	186	171	105	53.1	45.9
MAX	466	486	436	427	871	554	634	558	693	689	466	375
(WY)	1942	1978	1983	1974	1951	1979	1983	1973	1974	1969	1993	1989
MIN	0.93	1.87	0.84	0.50	2.44	13.8	11.3	11.3	9.95	6.91	3.48	2.13
(WY)	1957	1977	1977	1977	1989	1956	1956	1989	1977	1977	1988	1956

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1941 - 2004
ANNUAL TOTAL	22131.6		36251.9
ANNUAL MEAN	60.6		99.0		113
HIGHEST ANNUAL MEAN					334	1993
LOWEST ANNUAL MEAN					22.0	1977
HIGHEST DAILY MEAN	2570	May 1	1800	May 30	7630	Feb 19 1951
LOWEST DAILY MEAN	3.6 A	Jan 26	4.4	Oct 19,20	0.40	Oct 6 1956
ANNUAL SEVEN-DAY MINIMUM	3.8	Jan 22	4.6	Oct 18	0.40	Jan 20 1977
MAXIMUM PEAK FLOW			3390	May 30	8910 B	Feb 19 1951
MAXIMUM PEAK STAGE			12.64	May 30	15.52 C	Jun 23 1974
INSTANTANEOUS LOW FLOW			4.1	Oct 19,20	0.30	Oct 6 1956
ANNUAL RUNOFF (CFSM)	0.391		0.639		0.728
ANNUAL RUNOFF (INCHES)	5.31		8.70		9.90
10 PERCENT EXCEEDS	114		213		235
50 PERCENT EXCEEDS	13		60		48
90 PERCENT EXCEEDS	5.0		6.7		6.0

	A - Estimated due to backwater from ice.
	B - Gage height, 13.41 ft., from flood mark.
	C - Discharge, 5,760 ft³/s.