RIO GRANDE BASIN

08250000 CULEBRA CREEK AT SAN LUIS, CO

LOCATION.--Lat 37°11'01", long 105°25'31", Costilla County, Hydrologic Unit 13010002, on left bank at bridge 1 mi south of San Luis, and 1 mi upstream from the Rito Seco.

DRAINAGE AREA.--220 mi2.

PERIOD OF RECORD.--April 1927 to September 1982. October 1998 to current year. Monthly discharge only for some periods, published in WSP 1312. Records for January 1910 to December 1911, published as Culebra River at San Luis in WSP 288 and 308, have been found to be unreliable and should not be used. October 1982 to September 1998, in reports of State Engineer. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=08250000

REVISED RECORDS.--WSP 1312: 1940. See also PERIOD OF RECORD.

GAGE.--Water-stage recorder. Non-standard Parshall flume since May 23, 1931. Elevation of gage is 8,000 ft above NGVD of 1929, from topographic map. Prior to May 23, 1931, at different datum.

REMARKS.--No estimated daily discharges. Records good. Natural flow of stream affected by storage reservoir, diversions for irrigation, ground-water withdrawals, and return flows from irrigated areas. Flow regulated to large extent by Sanchez Reservoir on Ventero Creek, capacity 103,000 acre-ft.

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	12	12	11	9.6	12	12	11	9.3	116	74	25	28
2	16	12	11	9.3	11	12	12	22	97	73	20	36
3	12	12	11	9.8	11	12	11	43	77	72	20	57
4	12	13	11	9.9	9.8	12	11	41	67	73	27	57
5	11	13	12	10	10	11	10	38	81	72	47	54
6	11	13	11	11	10	11	10	34	105	71	47	53
7	11	13	10	11	10	12	11	34	101	69	47	55
8	11	12	11	11	12	12	10	34	64	67	52	46
9	11	13	10	11	8.9	12	10	36	63	67	57	41
10	11	14	10	12	9.8	12	10	43	62	77	17	64
11	11	13	10	11	10	12	11	42	61	97	23	34
12	11	13	9.9	12	11	12	11	42	61	96	39	35
13	11	13	10	11	13	11	9.8	46	61	99	43	39
14	11	16	10	12	13	11	11	46	61	110	52	35
15	11	16	9.7	11	12	11	12	48	66	110	52	30
16	11	12	10	12	11	11	11	51	71	110	53	27
17	11	12	10	11	11	11	11	53	73	110	52	25
18	11	12	10	10	12	12	11	55	68	98	53	23
19	12	11	8.7	11	12	12	14	64	54	75	56	26
20	11	11	8.7	11	11	13	19	71	57	78	53	25
21	11	12	8.8	11	11	14	16	75	51	68	52	25
22	11	12	8.7	12	11	14	14	72	46	88	60	26
23	13	11	9.2	12	13	14	14	75	41	59	68	28
24	12	12	9.3	12	12	12	12	79	40	83	30	28
25	12	11	9.0	12	11	12	10	89	41	78	38	29
26	12	11	8.8	12	12	11	9.8	72	35	81	62	23
27	15	11	8.7	12	11	12	10	57	37	86	71	21
28	13	11	8.8	12	12	12	11	59	47	56	64	21
29	12	11	9.2	12	---	12	11	64	50	47	52	21
30	12	11	9.3	11	---	11	9.8	76	53	38	52	21
31	13	---	9.3	12	---	11	---	97	---	31	35	---
TOTAL	365	369	304.1	346.6	313.5	369	344.4	1,667.3	1,907	2,413	1,419	1,033
MEAN	11.8	12.3	9.81	11.2	11.2	11.9	11.5	53.8	63.6	77.8	45.8	34.4
MAX	16	16	12	12	13	14	19	97	116	110	71	64
MIN	11	11	8.7	9.3	8.9	11	9.8	9.3	35	31	17	21
AC-FT	724	732	603	687	622	732	683	3,310	3,780	4,790	2,810	2,050
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1927 - 2003, BY WATER YEAR (WY)
MEAN	22.2	21.4	18.5	18.1	18.6	19.4	18.6	53.6	133	108	80.5	32.5
MAX	36.7	51.4	39.1	32.2	32.6	36.2	48.3	137	303	231	184	69.2
(WY)	(1942)	(1958)	(1958)	(1942)	(1942)	(1942)	(1942)	(1930)	(1942)	(1942)	(1949)	(1945)
MIN	6.00	6.63	6.64	7.03	6.70	7.42	7.79	11.7	40.1	30.4	27.3	9.49
(WY)	(1951)	(1951)	(1952)	(1951)	(1951)	(1951)	(1951)	(1955)	(1963)	(1977)	(1976)	(1972)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	(a) WATER YEARS 1927 - 2003
ANNUAL TOTAL	12,978.1	10,850.9
ANNUAL MEAN	35.6	29.7	45.4
HIGHEST ANNUAL MEAN			92.7 1942
LOWEST ANNUAL MEAN			18.2 1951
HIGHEST DAILY MEAN	138 Jun 14	116 Jun 1	479 Jun 1, 1942
LOWEST DAILY MEAN	8.7 Dec 19	8.7 Dec 19	4.6 Oct 31, 1950
ANNUAL SEVEN-DAY MINIMUM	8.9 Dec 19	8.9 Dec 19	5.0 Oct 22, 1950
MAXIMUM PEAK FLOW		244 Jul 22	b654 Jul 1, 1947
MAXIMUM PEAK STAGE		2.47 Jul 22	5.09 Jul 1, 1947
ANNUAL RUNOFF (AC-FT)	25,740	21,520	32,880
10 PERCENT EXCEEDS	81	71	115
50 PERCENT EXCEEDS	20	12	25
90 PERCENT EXCEEDS	11	10	11

a Water years 1927-1982 and 1999 to current year. b From rating curve extended above 300 ft3/s.