05585000 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN

05585000 LA MOINE RIVER AT RIPLEY, IL


LOCATION.-- Lat 40°01'29", long 90°37'54" (NAD of 1927), in SW1/4NE1/4 sec.33, T.1 N., R.2 W., Brown County, Hydrologic Unit 07130010, on deck of bridge on old U.S. Highway 24, 600 ft downstream from bridge on new U.S. Highway 24, 0.2 mi east of Ripley, 2 mi upstream from Town Branch, and at mile 12.3.

DRAINAGE AREA.-- 1,293 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: March 1921 to current year. Prior to October 1931, published as Crooked Creek at Ripley.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	SEDIMENT: Water years 1981 and 1995-97.
	CHEMICAL: Water years 1975-91.
	SPECIFIC CONDUCTANCE: Water year 1979.
	WATER TEMPERATURE: Water year 1979.
	MISCELLANEOUS: Sediment concentration and particle size, water years 1995-97.

REVISED RECORDS.-- WSP 975: 1936. WSP 1208: 1925, 1929, 1933. WDR IL-75-1: Drainage area.

GAGE.-- U.S. Army Corps of Engineers water-stage recorder, satellite telemeter, and crest-stage gage. Datum of gage is 431.1 ft above NGVD of 1929. Prior to July 28, 1926, nonrecording gage at site 200 ft upstream at datum 0.02 ft higher. July 28, 1926 to Jan. 11, 1935, nonrecording gage at present site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 28,000 ft³/s, Mar. 7, 1985, gage height, 29.07 ft; maximum gage height, 29.15 ft, May 18, 1995, observed; no flow for part of Sept. 26, 1989.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 7,140 mg/L, June 21, 1981; minimum daily mean, 5 mg/L, Dec. 4, 5, 1996.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 212,000 tons, May 8, 1996; minimum daily, 0.87 tons, Jan. 20, 1997.

REMARKS FOR CURRENT YEAR.-- Records fair 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	48	43	39	46	e36	e120	189	426	201	214	101	1270
2	48	46	38	48	e42	e106	167	500	192	189	94	1530
3	48	48	36	41	e50	e98	148	587	207	166	297	694
4	50	47	40	42	e58	e102	641	585	199	147	389	288
5	56	47	39	54	e66	e97	934	1930	200	133	154	171

6	62	43	31	53	e74	e94	395	1530	208	121	104	118
7	60	41	39	45	e56	e95	361	1140	220	112	83	89
8	61	41	39	47	e48	e100	346	706	227	108	71	71
9	60	43	34	51	e42	e110	313	584	256	1450	62	59
10	58	44	36	50	e37	e125	290	774	320	2800	56	51

11	52	42	36	32	e34	e170	260	4460	352	2250	52	46
12	47	40	37	42	e32	242	228	3970	281	1450	49	43
13	42	39	37	46	e32	196	203	2580	292	877	48	298
14	36	40	37	44	e34	267	185	1290	260	487	48	281
15	33	40	37	36	e42	358	170	882	217	327	49	168

16	32	38	37	e33	e80	335	170	727	194	255	45	142
17	31	36	38	e31	e230	270	657	617	172	214	43	108
18	33	37	110	e30	e210	253	533	532	155	3490	40	86
19	37	40	113	e29	e190	420	396	473	143	3830	38	72
20	33	39	84	e28	e170	545	346	425	132	1780	36	59

21	33	38	127	e27	e195	337	316	382	126	683	34	56
22	34	37	117	e27	e240	264	277	350	123	377	33	108
23	33	37	101	e26	e430	218	245	311	119	273	31	147
24	33	38	77	e25	e400	187	227	292	109	215	29	193
25	36	37	59	e26	e310	190	1370	294	115	176	29	188

26	34	36	46	e26	e230	206	1460	272	201	150	29	165
27	34	35	50	e26	e170	169	843	255	372	130	31	405
28	35	35	47	27	e140	190	542	236	605	153	29	226
29	41	35	47	27	---	262	494	218	425	130	173	161
30	44	38	46	29	---	212	445	206	273	114	130	132

31	45	---	46	32	---	207	---	207	---	109	106	---

TOTAL	1329	1200	1700	1126	3678	6545	13151	27741	6896	22910	2513	7425
MEAN	42.9	40.0	54.8	36.3	131	211	438	895	230	739	81.1	248
MAX	62	48	127	54	430	545	1460	4460	605	3830	389	1530
MIN	31	35	31	25	32	94	148	206	109	108	29	43
CFSM	0.03	0.03	0.04	0.03	0.10	0.16	0.34	0.69	0.18	0.57	0.06	0.19
IN.	0.04	0.03	0.05	0.03	0.11	0.19	0.38	0.80	0.20	0.66	0.07	0.21

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1921 - 2003, BY WATER YEAR (WY)
MEAN	429	506	485	616	1053	1302	1569	1433	1164	780	353	431
MAX	5747	5949	5060	3338	3899	5785	5678	9257	6336	5975	1591	5726
(WY)	1987	1986	1983	1946	1985	1985	1944	1995	1990	1993	1932	1961
MIN	7.06	9.08	7.92	13.2	9.96	61.4	116	21.3	42.5	16.1	11.4	5.13
(WY)	1957	1990	1990	1954	1989	1941	1934	1934	1936	1936	1936	1988

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1921 - 2003
ANNUAL TOTAL	454612		96214
ANNUAL MEAN	1246		264		842
HIGHEST ANNUAL MEAN					2452	1993
LOWEST ANNUAL MEAN					50.2	1989
HIGHEST DAILY MEAN	19600 A	May 15	4460	May 11	26800	Mar 7 1985
LOWEST DAILY MEAN	31	Oct 17, Dec 6	25 B	Jan 24	0.96	Sep 25 1989
ANNUAL SEVEN-DAY MINIMUM	33	Oct 15	26 B	Jan 21	1.8	Sep 22 1989
MAXIMUM PEAK FLOW			5710	Jul 18	28000 C	Mar 7 1985
MAXIMUM PEAK STAGE			19.75	Jul 18	29.15 D	May 18 1995
INSTANTANEOUS LOW FLOW			22 E	Jan 11	0.00	Sep 26 1989
ANNUAL RUNOFF (CFSM)	0.96		0.20		0.65
ANNUAL RUNOFF (INCHES)	13.08		2.77		8.85
10 PERCENT EXCEEDS	3090		537		2220
50 PERCENT EXCEEDS	232		109		234
90 PERCENT EXCEEDS	38		34		28

	A - Backwater from Illinois River.
	B - Estimated due to backwater from ice.
	C - Gage height, 29.07 ft.
	D - Observed.
	E - Result of freeze up.