PLATTE RIVER BASIN

06710385 BEAR CREEK ABOVE EVERGREEN, CO

LOCATION.--Lat 39°37'58", long 105°20'10", in SE14NE14 sec.9, T.5 S., R.71 W., Jefferson County, Hydrologic Unit 10190002, on right bank 0.9 mi upstream from Evergreen Lake dam at Evergreen.

DRAINAGE AREA.--104 mi2.

PERIOD OF RECORD.--August 1984 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06710385

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage 7,080 ft above NGVD of 1929, from topographic map. Prior to May 1, 1986, at site 800 ft downstream at different datum. May 1, 1986 to Apr. 2, 2001, at site 600 ft downstream at different datum.

REMARKS.--Records fair except for estimated daily discharges, which are poor. Natural flow of stream affected by small diversions for irrigation. 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	9.8	e10	e5.1	e4.6	e4.6	e4.8	e30	96	163	62	29	34
2	12	e10	e5.1	e4.6	e4.7	e4.8	e94	89	114	59	30	29
3	12	e10	e5.1	e4.6	e4.8	e4.8	e84	85	105	57	28	33
4	12	e10	e5.1	e4.6	e4.7	e4.8	49	82	101	55	37	41
5	10	e10	e5.1	e4.6	e4.6	e4.8	45	72	110	52	28	31
6	10	e11	e5.5	e4.6	e4.8	e5.0	42	68	106	51	26	29
7	9.9	e11	e5.3	e4.6	e4.7	e5.0	37	65	108	49	26	45
8	10	e10	e5.3	e4.6	e4.7	e5.1	43	63	96	47	26	51
9	10	e10	e5.1	e4.6	e4.6	e5.2	46	62	90	43	27	44
10	9.8	e9.1	e5.1	e4.6	e4.6	e5.2	64	65	92	42	27	40
11	9.2	e9.1	e5.3	e4.6	e4.6	e5.3	73	61	89	41	23	35
12	9.0	e8.6	e5.0	e4.7	e4.6	e5.4	81	61	88	39	23	33
13	8.9	e8.6	e5.0	e4.7	e4.7	e5.5	100	67	87	37	e24	33
14	8.9	e8.5	e5.0	e4.7	e4.7	e5.6	120	70	90	35	e20	34
15	8.8	e8.3	e5.0	e4.7	e4.7	e5.6	125	80	83	35	18	33
16	9.0	e8.5	e4.9	e4.7	e4.7	e5.7	113	77	81	34	18	30
17	8.8	e8.0	e4.7	e4.7	e4.6	e6.8	113	96	81	36	22	29
18	9.1	e7.6	e4.7	e4.7	e4.6	e35	110	101	84	34	22	28
19	8.6	e7.1	e4.7	e4.7	e4.6	e60	103	95	92	43	22	28
20	8.6	e6.8	e4.6	e4.7	e4.7	e20	90	88	93	41	18	27
21	8.6	e6.5	e4.6	e4.7	e4.7	e15	82	84	86	39	17	26
22	8.6	e6.3	e4.6	e4.7	e4.7	e15	85	90	80	34	17	25
23	8.8	e6.0	e4.6	e4.7	e4.8	e15	86	98	77	32	21	25
24	10	e6.1	e4.6	e4.7	e4.9	e15	83	112	76	33	22	24
25	9.0	e5.8	e4.7	e4.7	e4.8	e15	81	118	76	31	21	23
26	9.4	e5.6	e4.7	e4.7	e4.9	e17	92	107	72	30	20	22
27	10	e5.6	e4.6	e4.7	e4.8	e20	102	116	68	31	17	21
28	9.1	e5.3	e4.6	e4.6	e4.8	e17	106	138	65	34	19	22
29	10	e5.0	e4.6	e4.6	---	e17	108	137	66	56	18	21
30	e10	e4.8	e4.6	e4.6	---	e18	105	152	69	37	66	21
31	e10	---	e4.6	e4.5	---	e18	---	140	---	32	47	---
TOTAL	297.9	239.2	151.5	144.1	131.7	386.4	2,492	2,835	2,688	1,281	779	917
MEAN	9.61	7.97	4.89	4.65	4.70	12.5	83.1	91.5	89.6	41.3	25.1	30.6
MAX	12	11	5.5	4.7	4.9	60	125	152	163	62	66	51
MIN	8.6	4.8	4.6	4.5	4.6	4.8	30	61	65	30	17	21
AC-FT	591	474	301	286	261	766	4,940	5,620	5,330	2,540	1,550	1,820
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1985 - 2003, BY WATER YEAR (WY)
MEAN	27.4	22.1	15.5	13.0	12.2	15.7	37.6	94.0	98.7	57.1	49.8	33.0
MAX	85.1	56.2	32.8	19.6	18.2	26.7	89.7	238	280	134	129	54.2
(WY)	(1985)	(1985)	(1985)	(1998)	(1996)	(1992)	(1987)	(1998)	(1995)	(1995)	(1999)	(1997)
MIN	9.61	7.97	4.89	4.65	4.70	9.57	13.9	12.2	10.7	5.38	8.24	9.66
(WY)	(2003)	(2003)	(2003)	(2003)	(2003)	(1995)	(1991)	(2002)	(2002)	(2002)	(2002)	(2002)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1984 - 2003
ANNUAL TOTAL	3,368.1	12,342.8
ANNUAL MEAN	9.23	33.8	39.8
HIGHEST ANNUAL MEAN			70.5 1998
LOWEST ANNUAL MEAN			11.0 2002
HIGHEST DAILY MEAN	21 May 26	163 Jun 1	421 Jun 18, 1995
LOWEST DAILY MEAN	2.6 Sep 8	e4.5 Jan 31	2.6 Sep 8, 2002
ANNUAL SEVEN-DAY MINIMUM	3.3 Jul 15	e4.6 Dec 27	3.3 Jul 15, 2002
MAXIMUM PEAK FLOW		216 Jun 1	573 Jun 18, 1995
MAXIMUM PEAK STAGE		5.94 Jun 1	a5.39 Jun 18, 1995
ANNUAL RUNOFF (AC-FT)	6,680	24,480	28,840
10 PERCENT EXCEEDS	14	92	89
50 PERCENT EXCEEDS	9.1	18	24
90 PERCENT EXCEEDS	4.7	4.7	10

e Estimated. a Maximum gage height, 5.96 ft, Jul 13, 2001, present site and datum.