USGS CD-ROM: Current Year Discharge

05467000 POPE CREEK NEAR KEITHSBURG, IL

LOCATION.--Lat 41°07'42", long 90°55'10", in SE¼SE¼ sec.11, T.13 N., R.5 W., Mercer County, Hydrologic Unit 07080104, on right bank at downstream side of bridge on County Road 900 E, 1.8 mi northeast of Keithsburg, and at mile 3.0.

DRAINAGE AREA.--174 mi².

PERIOD OF RECORD.--October 1934 to September 1986. Monthly discharge only for some periods, published in WSP 1308. Seven-month period (March to September), water years 1987-90. October 1990 to September 1996. October 1997 to current year.

REVISED RECORDS.--WSP 1508: 1935-37(M), 1938, 1939-43(M). WDR IL-81-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 524.07 ft above sea level (levels by U.S. Army Corps of Engineers). Prior to Aug. 1, 1975, nonrecording gage and crest-stage gage at site 1,000 ft upstream at same datum. Aug. 1, 1975 to Aug. 24, 1981, water-stage recorder at site 500 ft downstream at same datum.

REMARKS.--Records fair except those for estimated daily discharges, which are poor. U.S. Army Corps of Engineers satellite telemeter at station.

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	20	96	169	76	125	347	1220	572	132	315	37	17
2	21	106	144	147	210	285	648	800	126	245	34	16
3	20	91	129	260	218	253	492	460	124	215	33	14
4	20	82	132	459	192	228	427	391	122	199	40	13
5	20	76	125	685	168	205	380	346	118	185	65	12

6	19	81	113	563	145	188	342	319	113	175	73	12
7	18	181	104	1020	131	177	331	324	107	165	53	11
8	18	192	96	669	122	366	607	882	111	191	62	11
9	19	163	93	456	110	800	1030	914	194	155	43	11
10	18	139	93	354	106	451	667	463	199	164	37	10

11	19	118	88	e300	151	362	495	384	179	137	32	10
12	19	105	77	e240	490	305	431	346	299	123	30	9.8
13	19	94	70	e205	409	283	530	319	271	113	28	10
14	20	86	53	e160	307	278	1200	283	304	105	26	150
15	19	80	60	e165	260	248	654	264	615	100	25	104

16	18	70	78	e155	230	231	703	260	687	94	24	47
17	17	58	68	e145	221	356	582	235	646	86	38	31
18	17	51	69	e140	205	2230	460	215	601	83	42	24
19	17	49	65	e135	184	1160	415	204	1000	78	70	20
20	17	48	64	e130	169	685	387	200	624	72	52	18

21	17	45	64	e125	158	485	376	196	497	67	33	17
22	17	44	68	e120	148	411	454	192	420	73	28	16
23	18	40	73	e115	141	361	386	190	360	91	25	17
24	23	36	75	e115	135	317	344	217	317	71	23	18
25	24	39	87	e110	128	293	318	223	281	59	22	17

26	31	35	99	e105	130	277	322	194	251	54	19	16
27	37	37	163	e105	495	258	291	177	226	51	19	14
28	53	79	198	e105	508	260	265	166	208	48	23	13
29	80	235	210	e110	---	271	270	158	264	45	22	15
30	115	190	109	118	---	242	272	150	379	42	20	16

31	105	---	86	116	---	1660	---	143	---	39	17	---

TOTAL	895	2746	3122	7708	5996	14273	15299	10187	9775	3640	1095	709.8
MEAN	28.9	91.5	101	249	214	460	510	329	326	117	35.3	23.7
MAX	115	235	210	1020	508	2230	1220	914	1000	315	73	150
MIN	17	35	53	76	106	177	265	143	107	39	17	9.8
CFSM	.17	.53	.58	1.43	1.23	2.65	2.93	1.89	1.87	.67	.20	.14
IN.	.19	.59	.67	1.65	1.28	3.05	3.27	2.18	2.09	.78	.23	.15

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 1998, BY WATER YEAR (WY)
MEAN	46.6	61.6	73.0	92.0	155	182	196	181	176	124	66.1	56.1
MAX	326	417	576	461	585	640	822	717	1020	1303	693	471
(WY)	1942	1978	1983	1974	1986	1993	1973	1996	1990	1982	1993	1980
MIN	2.40	2.96	2.63	2.74	5.29	19.1	11.4	7.68	10.9	1.24	2.75	1.82
(WY)	1964	1957	1965	1977	1964	1956	1956	1989	1936	1989	1989	1988

SUMMARY STATISTICS	FOR 1998 WATER YEAR		WATER YEARS 1935 - 1998
ANNUAL TOTAL			75445.8
ANNUAL MEAN	207		119
HIGHEST ANNUAL MEAN			399	1993
LOWEST ANNUAL MEAN			25.8	1940
HIGHEST DAILY MEAN	2230	Mar 18	6410	Jul 7 1982
LOWEST DAILY MEAN	9.8	Sep 12	.53	Aug 6 1989
ANNUAL SEVEN-DAY MINIMUM	10	Sep 7	.78	Aug 1 1989
INSTANTANEOUS PEAK FLOW	2940	Mar 31	8900 A	Apr 22 1973
INSTANTANEOUS PEAK STAGE	26.68	Mar 31	29.08 B	Jul 24 1993
INSTANTANEOUS LOW FLOW	9.3	Sep 12, 13
ANNUAL RUNOFF (CFSM)	1.19		.68
ANNUAL RUNOFF (INCHES)	16.13		9.26
10 PERCENT EXCEEDS	472		257
50 PERCENT EXCEEDS	128		46
90 PERCENT EXCEEDS	19		6.5

A - Gage height, 27.88 ft, from graph based on gage readings.
B - Backwater from the Mississippi River, discharge 7,270 ft³/s.