PLATTE RIVER BASIN

06710500 BEAR CREEK AT MORRISON, CO

LOCATION.--Lat 39°39'11", long 105°11'43", in SE14SW14 sec.35, T.4 S., R.70 W., Jefferson County, Hydrologic Unit 10190002, on left bank at Morrison, 180 ft upstream from bridge on State Highway 8, and 0.2 mi upstream from Mount Vernon Creek.

DRAINAGE AREA.--164 mi2.

PERIOD OF RECORD.--September 1887 to September 1891, May 1895 to December 1901, February 1902 (gage heights only), October 1919 to current year. No winter records for water years 1888-90, 1896, 1898, 1900. Monthly discharge only for some periods, published in WSP 1310. Published as "near Morrison" 1900-1902, as "at Starbuck" 1919-28, and as "at Idledale" 1929-34. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06710500

REVISED RECORDS.--WSP 976: 1942. WSP 1310: 1888, 1890-91, 1898, 1935(M). WSP 1730: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry and concrete control. Datum of gage is 5,780.43 ft above NGVD of 1929. See WSP 1710 or 1730 for history of changes prior to Oct. 1, 1934. Oct. 1, 1934 to Oct. 10, 1961, water-stage recorder at site 80 ft downstream at present datum.

REMARKS.--Records good except for estimated daily discharges, which are poor. Small diversions for irrigation of about 1,000 acres upstream from station.

COOPERATION.--Records collected and computed by Colorado Division of Water Resources and reviewed by Geological Survey.

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	11	12	11	e4.6	e9.4	e7.0	92	162	177	62	30	39
2	25	14	12	e4.3	e9.0	e7.8	142	149	133	58	30	31
3	22	14	11	e5.6	e8.7	e8.2	152	137	114	54	28	35
4	19	13	10	e6.7	e7.0	7.9	137	131	110	52	38	44
5	18	14	e7.0	e6.9	e8.5	7.5	116	116	124	50	28	35
6	16	12	e7.2	e7.7	e9.0	8.9	105	108	115	50	24	31
7	15	12	e7.9	e7.2	e7.0	10	92	103	121	49	24	40
8	15	13	e8.1	e7.6	e8.0	13	84	99	103	47	25	57
9	15	15	e6.3	e7.2	e9.0	13	100	98	94	42	25	46
10	15	12	e5.7	e6.2	e10	14	139	107	97	41	26	43
11	14	10	e7.6	e8.0	e8.2	15	183	100	93	39	23	38
12	13	9.8	e7.4	e8.0	e7.0	17	206	95	91	39	22	36
13	13	12	e6.9	e7.5	e8.8	17	234	96	91	38	20	36
14	12	13	e8.8	e7.8	e9.7	18	265	100	93	35	19	38
15	12	12	e8.9	e7.4	e11	19	276	113	84	35	19	36
16	11	11	e8.0	e7.3	e9.7	17	236	131	82	36	18	33
17	11	13	e8.2	e7.8	e9.2	19	225	130	82	38	20	29
18	12	12	e8.6	e5.7	e8.7	14	215	139	86	35	26	31
19	11	10	e6.0	e7.9	e9.0	8.7	215	133	92	44	27	30
20	11	11	e4.0	e7.0	e7.8	15	192	125	97	44	21	30
21	10	12	e4.0	e7.9	e9.1	20	169	116	89	43	17	27
22	11	11	e4.7	e6.5	e8.7	30	167	117	79	38	18	26
23	11	12	e3.0	e7.9	e6.0	32	173	122	77	34	24	26
24	11	11	e2.9	e8.3	e5.0	34	169	137	76	33	28	24
25	12	9.1	e4.8	e8.0	e7.0	31	158	142	77	31	23	23
26	11	7.7	e2.0	e7.7	e7.5	45	161	131	73	30	22	22
27	11	8.7	e2.0	e9.2	e7.5	56	175	134	68	30	20	22
28	12	11	e3.0	e8.7	e6.5	44	177	150	65	35	19	22
29	13	12	e2.8	e8.8	---	35	185	142	65	55	21	22
30	11	12	e2.9	e9.0	---	40	180	161	69	44	66	22
31	9.5	---	e3.7	e8.8	---	55	---	148	---	35	58	---
TOTAL	413.5	351.3	196.4	229.2	232.0	679.0	5,120	3,872	2,817	1,296	809	974
MEAN	13.3	11.7	6.34	7.39	8.29	21.9	171	125	93.9	41.8	26.1	32.5
MAX	25	15	12	9.2	11	56	276	162	177	62	66	57
MIN	9.5	7.7	2.0	4.3	5.0	7.0	84	95	65	30	17	22
AC-FT	820	697	390	455	460	1,350	10,160	7,680	5,590	2,570	1,600	1,930
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1900 - 2003, BY WATER YEAR (WY)
MEAN	30.8	23.4	16.9	13.8	14.3	20.2	54.4	146	135	71.0	63.3	43.1
MAX	115	86.7	57.0	34.0	36.0	48.3	296	525	551	249	307	371
(WY)	(1985)	(1924)	(1924)	(1924)	(1924)	(1960)	(1942)	(1973)	(1949)	(1949)	(1923)	(1938)
MIN	9.52	9.59	6.34	5.19	4.00	4.00	13.1	12.4	10.5	3.03	3.96	5.41
(WY)	(1935)	(1957)	(2003)	(1950)	(1933)	(1933)	(1982)	(1963)	(2002)	(2002)	(2002)	(1978)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1900 - 2003
ANNUAL TOTAL	3,795.36	16,989.4
ANNUAL MEAN	10.4	46.5	52.3
HIGHEST ANNUAL MEAN			125 1942
LOWEST ANNUAL MEAN			12.0 2002
HIGHEST DAILY MEAN	e36 Sep 13	276 Apr 15	1,410 May 7, 1969
LOWEST DAILY MEAN	0.62 Jul 20	e2.0 Dec 26	0.62 Jul 20, 2002
ANNUAL SEVEN-DAY MINIMUM	1.0 Jul 28	e2.9 Dec 24	1.0 Jul 28, 2002
MAXIMUM PEAK FLOW		312 Apr 15	e8,600 Jul 24, 1896
MAXIMUM PEAK STAGE		7.24 Apr 15
ANNUAL RUNOFF (AC-FT)	7,530	33,700	37,880
10 PERCENT EXCEEDS	16	133	117
50 PERCENT EXCEEDS	11	22	25
90 PERCENT EXCEEDS	2.6	7.2	11

e Estimated.