PLATTE RIVER BASIN

06718550 NORTH CLEAR CREEK ABOVE MOUTH NEAR BLACKHAWK, CO

LOCATION.--Lat 39°44'56", long 105°23'57", in NE14SW14 sec.36, T.3 S., R.72 W., Clear Creek County, Hydrologic Unit 10190004, on left bank 150 ft upstream from intersection of Hwy 6 and Hwy 119 bridge over North Clear Creek, 0.2 mi above mouth, and 6.5 mi southeast of Blackhawk.

DRAINAGE AREA.--60.2 mi2 (revised).

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=06718550

GAGE.--Water-stage recorder. Elevation of gage is 6,910 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	3.8	4.2	e3.7	e2.5	e2.4	e2.4	6.7	32	136	20	7.7	6.4
2	8.1	4.2	e3.6	e2.6	e2.4	e2.6	7.4	31	127	17	7.4	5.9
3	5.8	4.0	e3.6	e2.5	e2.4	e2.7	7.9	30	114	16	7.2	9.2
4	5.5	3.4	e3.6	e2.4	e2.4	e2.6	7.5	30	97	15	7.2	6.8
5	5.0	2.7	e3.6	e2.3	e2.4	e2.5	7.2	29	88	13	6.8	5.0
6	4.7	3.3	e3.6	e2.3	e2.4	e2.5	7.0	28	73	11	6.7	5.2
7	4.5	4.9	e3.6	e2.2	e2.4	e2.5	6.7	28	70	12	6.3	7.1
8	4.3	3.5	e3.6	e2.3	e2.3	e2.4	6.3	27	57	11	6.2	5.6
9	4.3	3.7	e3.5	e2.3	e2.3	e2.5	6.8	27	55	11	5.8	7.1
10	4.1	3.7	e3.5	e2.1	e2.3	e2.5	7.9	28	53	10	5.8	5.5
11	4.1	4.6	e3.5	e2.0	e2.3	e2.6	11	26	e51	9.6	5.4	5.0
12	4.1	4.5	e3.5	e1.9	e2.3	e2.6	14	27	e49	9.3	5.1	4.7
13	4.0	3.5	e3.3	e1.9	e2.3	e2.7	19	29	e47	9.2	4.7	4.8
14	3.8	3.2	e3.3	e1.9	e2.3	3.0	26	31	e46	9.0	4.4	5.2
15	3.6	3.5	e3.1	e1.8	e2.3	3.0	28	36	e44	8.8	4.3	4.7
16	3.7	4.4	e3.2	e1.8	e2.4	3.1	26	46	e43	9.5	4.0	4.4
17	3.9	3.4	e3.2	e1.8	e2.5	3.3	26	60	e41	9.2	3.9	4.1
18	4.1	3.4	e3.2	e1.9	e2.4	4.2	26	70	e39	9.1	5.7	4.6
19	4.3	3.8	e3.1	e2.0	e2.4	e8.0	26	75	e37	8.9	4.9	4.5
20	4.1	3.0	e3.1	e2.0	e2.4	e5.5	24	73	e36	7.8	4.0	4.3
21	4.0	3.1	e3.1	e1.9	e2.4	e5.0	23	75	34	7.9	3.6	4.1
22	4.0	e3.2	e2.9	e1.9	e2.4	5.0	24	75	32	8.1	3.7	3.8
23	4.0	e3.2	e2.7	e1.9	e2.3	5.9	26	84	31	7.3	3.8	3.6
24	4.4	e3.2	e2.7	e1.9	e2.3	6.3	26	95	31	7.7	4.0	3.6
25	4.1	e3.3	e2.6	e1.9	e2.3	5.0	27	106	31	7.2	3.8	3.6
26	3.9	e3.4	e2.7	e2.0	e2.2	5.6	29	108	28	9.5	3.7	3.4
27	3.9	e3.5	e2.7	e2.0	e2.2	6.3	32	118	27	8.7	3.4	3.5
28	3.9	e3.8	e2.6	e2.1	e2.2	5.4	33	122	25	20	3.3	3.7
29	4.2	e3.9	e2.6	e2.3	---	5.8	36	128	22	13	3.4	3.6
30	4.6	e3.8	e2.5	e2.3	---	4.7	34	135	21	10	23	3.7
31	4.3	---	e2.5	e2.4	---	5.5	---	139	---	8.4	8.1	---
TOTAL	135.1	109.3	98.0	65.1	65.6	123.7	587.4	1,948	1,585	334.2	177.3	146.7
MEAN	4.36	3.64	3.16	2.10	2.34	3.99	19.6	62.8	52.8	10.8	5.72	4.89
MAX	8.1	4.9	3.7	2.6	2.5	8.0	36	139	136	20	23	9.2
MIN	3.6	2.7	2.5	1.8	2.2	2.4	6.3	26	21	7.2	3.3	3.4
AC-FT	268	217	194	129	130	245	1,170	3,860	3,140	663	352	291
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1995 - 2003, BY WATER YEAR (WY)
MEAN	5.75	4.43	3.61	3.16	3.16	5.13	14.8	72.6	75.2	19.5	14.6	6.66
MAX	12.3	8.09	6.42	4.92	5.79	8.46	24.5	112	228	49.7	50.8	13.3
(WY)	(2000)	(2000)	(2000)	(2000)	(2000)	(2000)	(1998)	(1995)	(1995)	(1995)	(1999)	(1999)
MIN	3.08	2.68	1.68	1.30	1.38	2.21	7.60	11.1	10.8	6.12	3.30	3.62
(WY)	(1995)	(1995)	(1995)	(1995)	(1995)	(1995)	(1995)	(2002)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1995 - 2003
ANNUAL TOTAL	1,993.8	5,375.4
ANNUAL MEAN	5.46	14.7	19.1
HIGHEST ANNUAL MEAN			35.6 1995
LOWEST ANNUAL MEAN			5.50 2002
HIGHEST DAILY MEAN	25 Jun 4	139 May 31	415 May 31, 1995
LOWEST DAILY MEAN	e2.1 Feb 27	e1.8 Jan 15	e,a0.00 Aug 7, 2000
ANNUAL SEVEN-DAY MINIMUM	2.3 Sep 2	e1.9 Jan 12	0.00 Aug 7, 2000
MAXIMUM PEAK FLOW		252 May 27	b759 Jun 2, 1995
MAXIMUM PEAK STAGE		5.31 May 27	5.87 Jun 2, 1995
ANNUAL RUNOFF (AC-FT)	3,950	10,660	13,840
10 PERCENT EXCEEDS	11	36	56
50 PERCENT EXCEEDS	4.0	4.4	5.8
90 PERCENT EXCEEDS	2.7	2.3	2.5

e Estimated. a Also occurred Aug 8-12, 2000. b From rating curve extended above 300 ft3/s.