PLATTE RIVER BASIN

06716500 CLEAR CREEK NEAR LAWSON, CO

LOCATION.--Lat 39°45'57", long 105°37'32", in NW14NW14 sec.25, T.3 S., R.74 W., Clear Creek County, Hydrologic Unit 10190004, at east edge of Lawson, on left bank, 30 ft downstream from private bridge, and 2.0 mi downstream from West Fork Clear Creek.

DRAINAGE AREA.--147 mi2.

PERIOD OF RECORD.--March 1946 to September 1986; October 1994 to current year. Records prior to 1959 include inflow from August P. Gumlick Tunnel (formerly Jones Pass tunnel). For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06716500

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 8,080 ft above NGVD of 1929, from topographic map. Mar. 29, 1946 to Sept. 30, 1967, at site 1.5 mi upstream at different datum.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow affected by minor transmountain diversion from Colorado River basin through Berthoud Pass ditch (see elsewhere in this report). 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	44	27	26	e20	18	19	29	67	1,370	488	179	126
2	56	28	25	e20	18	e22	33	63	1,120	470	167	120
3	56	27	25	e20	19	e24	34	64	974	455	171	122
4	51	27	24	20	e19	e22	31	64	852	440	164	124
5	39	29	24	19	e19	e23	29	58	782	421	152	122
6	40	27	24	19	e19	e23	28	59	679	402	140	158
7	44	26	e25	19	e19	22	26	59	619	381	143	166
8	38	25	e25	18	e19	20	26	61	539	370	153	156
9	40	24	e25	19	e19	22	29	57	545	356	137	216
10	43	23	e25	e19	e19	21	33	62	601	344	133	186
11	36	23	e25	e19	e20	21	39	57	654	330	119	174
12	36	23	e25	18	e19	22	43	58	680	317	113	161
13	38	27	e25	17	e19	22	46	72	674	312	108	156
14	33	28	e24	17	e19	23	53	84	658	298	116	152
15	35	27	22	17	19	22	58	108	687	287	105	140
16	35	24	22	e17	19	22	51	128	695	281	103	131
17	34	28	22	e17	20	24	49	192	672	282	165	122
18	37	28	e23	e17	19	25	49	227	700	276	179	109
19	31	26	e23	e18	18	e26	48	231	717	289	144	112
20	24	26	e23	e18	19	e25	46	232	705	305	119	111
21	29	26	e22	e17	18	e25	45	245	663	280	116	102
22	33	25	e21	17	18	24	47	280	650	265	112	97
23	37	25	e21	17	19	26	48	340	639	255	109	96
24	38	25	e20	16	e19	29	49	429	621	243	117	92
25	39	25	e20	17	e19	28	48	520	576	240	133	91
26	39	e26	e20	16	e18	27	57	557	536	237	133	85
27	37	e26	e20	17	18	26	64	658	529	229	112	84
28	31	e27	e20	17	17	26	65	844	514	223	104	83
29	28	e28	e20	17	---	25	69	1,030	510	220	102	80
30	25	27	e20	17	---	25	70	1,170	495	207	147	80
31	26	---	e20	18	---	25	---	1,320	---	200	147	---
TOTAL	1,152	783	706	554	525	736	1,342	9,396	20,656	9,703	4,142	3,754
MEAN	37.2	26.1	22.8	17.9	18.8	23.7	44.7	303	689	313	134	125
MAX	56	29	26	20	20	29	70	1,320	1,370	488	179	216
MIN	24	23	20	16	17	19	26	57	495	200	102	80
AC-FT	2,280	1,550	1,400	1,100	1,040	1,460	2,660	18,640	40,970	19,250	8,220	7,450
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1946 - 2003, BY WATER YEAR (WY)
MEAN	60.6	43.1	33.9	28.9	27.6	28.2	43.3	199	598	396	170	90.2
MAX	132	79.9	52.2	41.0	37.3	39.0	89.1	431	1,000	943	404	193
(WY)	(1962)	(1985)	(2000)	(1971)	(2000)	(2000)	(1962)	(1958)	(1952)	(1957)	(1984)	(1984)
MIN	35.6	26.1	22.8	17.9	16.8	17.6	26.3	83.4	175	70.0	50.8	40.8
(WY)	(1957)	(2003)	(2003)	(2003)	(1955)	(1951)	(1964)	(1995)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1946 - 2003
ANNUAL TOTAL	20,413	53,449
ANNUAL MEAN	55.9	146	144
HIGHEST ANNUAL MEAN			225 1984
LOWEST ANNUAL MEAN			60.0 2002
HIGHEST DAILY MEAN	235 Jun 3	1,370 Jun 1	1,660 Jun 17, 1965
LOWEST DAILY MEAN	e20 Dec 24	16 Jan 24	13 Feb 20, 1955
ANNUAL SEVEN-DAY MINIMUM	e20 Dec 24	e17 Jan 21	15 Feb 18, 1955
MAXIMUM PEAK FLOW		1,540 May 31	6,130 Jun 4, 1956
MAXIMUM PEAK STAGE		7.04 May 31	a7.41 Jun 4, 1956
ANNUAL RUNOFF (AC-FT)	40,490	106,000	104,300
10 PERCENT EXCEEDS	124	501	414
50 PERCENT EXCEEDS	38	39	50
90 PERCENT EXCEEDS	24	19	25

e Estimated. a Site and datum then in use.