05577500 DATA: Discharge Tables, 2002

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 1994-2002.

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, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	0.10	28	21	15	460	74	68	276	76	58	4.2	8.2
2	0.05	34	19	14	292	148	67	275	70	52	3.4	6.4
3	0.02	19	16	14	222	188	63	232	63	48	3.1	3.7
4	e0.01	15	15	14	178	152	57	197	64	45	2.8	1.9
5	33	14	15	14	141	135	55	170	136	41	2.0	1.1

6	3.8	12	17	14	124	136	53	239	71	38	1.5	0.61
7	1.2	11	15	13	112	136	54	527	55	33	0.66	0.49
8	1.5	10	14	12	96	116	141	668	49	30	0.62	0.40
9	4.8	10	13	13	86	187	180	651	45	28	0.59	0.31
10	34	8.7	13	13	97	187	129	597	42	27	0.53	0.21

11	55	8.3	12	12	81	151	111	457	170	28	0.28	0.06
12	64	6.9	21	12	75	138	102	3530	393	29	0.39	e0.01
13	96	6.4	21	12	66	116	89	2660	925	25	14	e0.01
14	47	6.5	33	13	56	104	84	972	1000	22	50	e0.01
15	50	6.2	25	12	56	101	82	469	478	18	11	2.5

16	62	5.6	45	10	53	86	74	355	284	15	29	e0.01
17	37	5.1	97	10	49	76	67	393	198	12	11	e0.01
18	36	4.4	77	11	44	74	61	399	161	9.0	11	1.3
19	35	5.4	52	14	146	70	112	315	135	7.2	248	4.8
20	30	3.4	39	13	147	76	158	248	114	7.2	81	2.9

21	32	2.6	32	15	123	67	450	215	102	6.6	26	e0.01
22	36	2.5	47	14	98	59	380	189	94	5.8	14	0.19
23	56	2.4	38	14	88	59	255	169	88	5.5	83	0.53
24	65	123	30	18	85	61	374	162	82	3.6	38	0.59
25	43	31	24	14	82	111	510	136	81	2.6	19	0.59

26	33	22	23	13	79	90	296	117	136	105	11	0.53
27	31	19	22	13	63	84	689	107	97	98	7.0	0.38
28	31	15	20	12	64	88	1300	123	77	26	4.4	0.27
29	29	25	18	19	---	91	723	130	68	15	3.3	0.23
30	31	36	15	68	---	83	344	103	63	11	4.7	0.17

31	29	---	16	439	---	72	---	86	---	7.4	8.7	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2002, BY WATER YEAR (WY)
MEAN	22.06	29.23	53.89	57.50	85.91	110.3	130.2	129.0	97.80	42.56	26.13	20.12
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	0.000	0.000	0.000	0.000	0.22	0.23	0.66	0.052	8.05	1.38	0.016	0.000
(WY)	1954	1954	1954	1956	1954	1954	1954	1954	1953	1976	1953	1952

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1948 - 2002
ANNUAL TOTAL	25043.57		39146.37
ANNUAL MEAN	68.61		107.3		67.61
HIGHEST ANNUAL MEAN					156	1993
LOWEST ANNUAL MEAN					2.15	1954
HIGHEST DAILY MEAN	1590	Jun 7	3530	May 12	5320	May 8 1996
LOWEST DAILY MEAN	.01	A	.01	A	0.00	B
ANNUAL SEVEN-DAY MINIMUM	0.06	Aug 9	0.14	Sep 8	0.00	Sep 1 1949
MAXIMUM PEAK FLOW			5860	May 12	10700	May 8 1996
MAXIMUM PEAK STAGE			14.01	May 12	16.23	May 8 1996
ANNUAL RUNOFF (CFSM)	0.64		1.00		0.63
ANNUAL RUNOFF (INCHES)	8.71		13.61		8.58
10 PERCENT EXCEEDS	152		235		155
50 PERCENT EXCEEDS	31		37		21
90 PERCENT EXCEEDS	0.84		1.7		0.02

	A - Several days, estimated.
	B - Many days in most years.