PLATTE RIVER BASIN

06718300 CLEAR CREEK ABOVE JOHNSON GULCH NEAR IDAHO SPRINGS, CO

LOCATION.--Lat 39°44'47", long 105°26'08", in NE14SW14 sec.34, T.3 S., R.72 W., Clear Creek County, Hydrologic Unit 10190004, on left bank 150 ft downstream from I-70 exit 243 bridge over Clear Creek, and 2 mi east of Idaho Springs.

DRAINAGE AREA.--267 mi2.

PERIOD OF RECORD.--October 1994 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06718300

GAGE.--Water-stage recorder. Elevation of gage is 7,210 ft above NGVD of 1929, from topographic map.

REMARKS.--Records good except for estimated daily discharges which are poor. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality Data For Gaging Stations" section of this report.

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	67	45	e33	e28	e26	e26	51	126	1,600	686	223	178
2	83	48	e33	e28	e26	e28	64	119	1,390	667	214	169
3	79	46	e31	e28	e26	e30	68	116	1,270	652	230	195
4	75	46	e31	e28	e26	e29	63	122	1,130	632	230	188
5	66	45	e30	e27	e26	e29	57	109	1,060	606	215	171
6	61	44	e30	e27	e26	e35	55	106	937	580	202	207
7	68	42	e31	e26	e26	e31	49	104	880	541	200	237
8	63	40	e31	e26	e26	e27	48	107	789	524	215	222
9	62	40	e30	e26	e26	e28	54	101	785	502	198	279
10	65	38	e30	e26	e26	e28	65	107	841	480	197	239
11	59	40	e31	e26	e26	e28	75	99	888	458	180	225
12	58	38	e31	e26	e26	e29	83	101	907	435	172	213
13	59	45	e31	e26	e26	e29	91	121	897	427	164	205
14	54	42	e31	e26	e26	e31	107	141	872	406	163	202
15	55	40	e30	e26	e26	e31	113	180	895	387	154	189
16	56	e35	e29	e26	e27	e32	101	199	900	375	146	175
17	54	e39	e29	e26	e27	e36	95	269	881	370	205	170
18	56	e38	e29	e26	e26	e39	96	320	910	359	219	155
19	52	e35	e29	e26	e25	e35	91	329	911	386	193	157
20	44	e36	e29	e26	e25	e38	86	334	897	428	166	158
21	48	e34	e29	e26	e25	e40	82	373	862	385	155	149
22	51	e34	e28	e25	e26	42	85	437	846	349	164	141
23	55	e34	e28	e25	e26	45	88	534	839	334	157	138
24	56	e33	e28	e25	e25	49	88	654	832	311	163	141
25	56	e32	e28	e25	e25	46	89	747	785	307	176	136
26	55	e33	e28	e25	e25	47	106	798	727	312	183	132
27	54	e34	e28	e25	e25	46	119	900	721	296	158	130
28	46	e35	e28	e25	e24	43	123	1,110	708	278	150	129
29	45	e35	e28	e25	---	40	132	1,280	714	274	148	127
30	40	e34	e28	e26	---	41	132	1,440	698	252	230	127
31	44	---	e28	e26	---	43	---	1,540	---	241	210	---
TOTAL	1,786	1,160	918	808	721	1,101	2,556	13,023	27,372	13,240	5,780	5,284
MEAN	57.6	38.7	29.6	26.1	25.8	35.5	85.2	420	912	427	186	176
MAX	83	48	33	28	27	49	132	1,540	1,600	686	230	279
MIN	40	32	28	25	24	26	48	99	698	241	146	127
AC-FT	3,540	2,300	1,820	1,600	1,430	2,180	5,070	25,830	54,290	26,260	11,460	10,480
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1995 - 2003, BY WATER YEAR (WY)
MEAN	100	63.9	48.6	41.3	39.5	44.9	74.5	351	834	540	267	153
MAX	126	83.6	62.6	54.6	54.7	58.8	106	549	1,325	1,398	526	213
(WY)	(1999)	(2000)	(2000)	(1996)	(2000)	(2000)	(2000)	(1996)	(1995)	(1995)	(1999)	(1999)
MIN	57.6	38.7	29.6	26.1	25.8	33.8	49.9	137	215	103	73.9	61.3
(WY)	(2003)	(2003)	(2003)	(2003)	(2003)	(2002)	(1995)	(2002)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1995 - 2003
ANNUAL TOTAL	26,688	73,749
ANNUAL MEAN	73.1	202	214
HIGHEST ANNUAL MEAN			326 1995
LOWEST ANNUAL MEAN			79.2 2002
HIGHEST DAILY MEAN	290 Jun 4	1,600 Jun 1	2,080 Jun 22, 1995
LOWEST DAILY MEAN	e25 Feb 27	e24 Feb 28	e24 Feb 28, 2003
ANNUAL SEVEN-DAY MINIMUM	e28 Jan 11	e25 Jan 22	e25 Jan 22, 2003
MAXIMUM PEAK FLOW		1,810 Jun 1	2,250 Jun 21, 1995
MAXIMUM PEAK STAGE		7.75 Jun 1	a7.46 Jun 21, 1995
ANNUAL RUNOFF (AC-FT)	52,940	146,300	154,800
10 PERCENT EXCEEDS	165	702	593
50 PERCENT EXCEEDS	57	64	81
90 PERCENT EXCEEDS	29	26	36

e Estimated. a Maximum gage height, 8.23 ft, Jun 17, 1995.