05577500 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 39°48'55", long 89°41'55" (NAD of 1927), in NW1/4NE1/4 sec.30, T.16 N., R.5 W., Sangamon County, Hydrologic Unit 07130008, on right bank at downstream side of bridge on State Highways 125 and 97 (Jefferson Street), 0.1 mi east of intersection of State Highway 4 (Veterans Parkway) and State Highways 125 and 97 (Jefferson Street), in Springfield, and at mile 8.2.

DRAINAGE AREA.-- 107 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: January to February 1948, April to June 1948, December 1948 to current year.
	STAGE: Water years 1994 to current year.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 524.65 ft above NGVD of 1929. Prior to Dec. 22, 1948, and Mar. 24, 1981 to Mar. 30, 1983, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 10,700 ft³/s, May 8, 1996, gage height, 16.23 ft; no flow for many days in most years.

REMARKS FOR CURRENT YEAR.-- Records 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	2.0	15	47	35	e21	36	90	96	41	12	10	3.1
2	2.4	23	40	35	e24	37	79	82	33	11	8.0	2.1
3	3.3	20	39	37	40	33	73	73	29	42	6.4	1.6
4	2.4	25	41	111	32	91	67	68	26	26	6.7	1.3
5	2.2	43	44	144	e29	185	62	68	28	16	9.8	0.94

6	2.1	25	41	91	e27	159	59	61	26	37	7.7	0.57
7	1.9	21	36	111	e25	113	57	56	25	21	5.7	0.31
8	1.7	17	36	87	e24	90	54	51	23	21	3.6	0.34
9	35	15	37	72	e26	80	49	50	22	15	3.0	0.58
10	8.1	15	45	62	e28	71	45	51	40	116	3.8	0.62

11	3.9	22	40	59	32	67	44	48	54	194	2.8	0.48
12	5.9	23	32	59	34	62	42	46	35	55	1.7	0.37
13	6.6	20	29	53	31	57	40	45	39	33	1.0	0.31
14	104	17	30	50	e29	59	38	89	26	24	0.90	0.38
15	19	17	33	50	e27	55	37	73	92	18	0.92	1.9

16	9.9	19	34	47	e27	58	37	67	75	14	0.95	5.6
17	6.2	37	32	57	31	59	36	62	47	11	14	2.2
18	6.2	351	28	57	33	54	35	65	38	9.5	31	1.3
19	5.0	353	28	45	50	49	33	58	32	8.1	5.2	1.1
20	3.8	207	23	e39	77	46	44	54	25	5.8	10	0.84

21	2.6	136	25	e36	68	44	43	50	26	4.7	5.1	0.64
22	7.2	101	30	e33	48	40	59	47	e25	4.6	3.1	0.46
23	8.9	111	86	e32	41	40	48	56	23	4.9	1.9	0.34
24	8.8	122	82	e36	40	44	70	56	19	4.3	4.0	0.26
25	10	108	62	e30	37	63	160	80	23	3.5	37	0.20

26	15	88	53	e25	35	122	188	63	18	3.3	29	0.14
27	14	73	49	e24	34	145	130	54	16	2.5	19	0.09
28	13	62	48	e23	33	156	105	51	15	2.1	18	0.07
29	14	54	46	e22	34	137	93	43	15	3.0	14	0.03
30	13	51	41	e22	---	117	86	49	13	20	7.7	0.01

31	13	---	37	e21	---	102	---	49	---	12	3.8	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2004, BY WATER YEAR (WY)
MEAN	21.5	29.5	52.7	56.4	83.6	108	127	127	96.8	42.1	25.4	19.8
MAX	244	225	523	282	281	374	605	617	418	358	292	296
(WY)	1960	1986	1983	1950	1975	1978	1957	1996	1990	1981	1981	1993
MIN	0.00	0.00	0.00	0.00	0.22	0.23	0.66	0.05	8.05	1.38	0.02	0.00
(WY)	1954	1954	1954	1956	1954	1954	1954	1954	1953	1976	1953	1952

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1948 - 2004
ANNUAL TOTAL	13463.34		14780.35
ANNUAL MEAN	36.9		40.4		66.4
HIGHEST ANNUAL MEAN					156	1993
LOWEST ANNUAL MEAN					2.15	1954
HIGHEST DAILY MEAN	379	Jun 14	353	Nov 19	5320	May 8 1996
LOWEST DAILY MEAN	0.00	Aug 28,29	0.01	Sep 30	0.00	A
ANNUAL SEVEN-DAY MINIMUM	0.11	Aug 24	0.11	Sep 24	0.00	A
MAXIMUM PEAK FLOW			401	Nov 18	10700	May 8 1996
MAXIMUM PEAK STAGE			7.23	Nov 18	16.23	May 8 1996
INSTANTANEOUS LOW FLOW			0.00	Sep 30
ANNUAL RUNOFF (CFSM)	0.345		0.377		0.620
ANNUAL RUNOFF (INCHES)	4.68		5.14		8.43
10 PERCENT EXCEEDS	89		87		151
50 PERCENT EXCEEDS	22		33		21
90 PERCENT EXCEEDS	1.3		2.1		0.05

	A - Many occurrences in most years.