RIO GRANDE BASIN

08248000 LOS PINOS RIVER NEAR ORTIZ, CO

LOCATION.--Lat 36°58'56", long 106°04'23", on line between sec.26, and sec.27, T.32 N., R.8 E., Rio Arriba County, New Mexico, Hydrologic Unit 13010005, on left bank 0.9 mi upstream (south) from Colorado-New Mexico State line, 2.1 mi southwest of Ortiz, and 2.9 mi upstream from mouth.

DRAINAGE AREA.--167 mi2.

PERIOD OF RECORD.--January 1915 to December 1920, October 1924 to current year. Monthly discharge only for some periods, published in WSP 1312. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=08248000

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 8,040 ft above NGVD of 1929, from topographic map. Prior to Apr. 15, 1955, at site 350 ft upstream at datum 2.52 ft higher.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by diversions for irrigation and return flows from irrigated areas.

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

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Oct. 5, 1911, is the greatest since at least 1854, from information obtained from local residents in 1959.

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	14	15	e14	e9.0	e14	e13	38	349	328	24	17	13
2	15	14	e12	e8.6	e13	e14	54	348	317	22	18	11
3	18	14	e12	e10	e12	e19	53	343	296	20	16	11
4	16	14	e12	e11	e11	e19	46	300	265	19	14	13
5	15	12	e8.0	e11	e10	e20	41	250	236	18	12	16
6	15	11	e8.0	e11	e9.4	e19	39	252	206	18	11	24
7	13	12	e7.0	e11	e9.2	e18	34	256	177	17	12	35
8	13	13	e8.0	e11	e9.0	e17	31	233	155	15	13	23
9	12	18	e8.0	e11	e9.8	16	37	210	141	14	12	23
10	11	17	e8.0	e11	e9.8	16	62	250	131	13	12	293
11	10	15	e8.0	e10	e12	18	79	252	120	14	11	133
12	10	16	e8.0	e9.5	e22	23	96	321	109	13	12	74
13	9.9	24	e8.0	e10	e33	27	113	377	99	14	11	52
14	9.4	22	e8.4	e11	e60	31	147	419	91	13	9.7	41
15	8.8	18	e9.0	e11	e30	34	187	482	85	12	8.5	36
16	8.8	e16	e9.0	e9.0	e16	36	130	430	79	13	8.1	32
17	8.6	e18	e9.0	e9.5	e17	33	146	506	78	13	7.3	28
18	8.5	e18	e8.0	e9.5	e16	29	149	531	73	10	7.1	26
19	8.8	e17	e7.0	e11	e14	27	132	483	86	9.2	7.1	23
20	9.0	e18	e7.0	e11	e13	24	110	449	104	11	6.7	22
21	8.7	18	e7.4	e11	e13	26	131	434	73	16	7.3	21
22	8.7	17	e7.0	e11	e11	25	167	459	59	14	8.7	20
23	9.1	16	e7.8	e12	e10	28	168	467	50	13	11	20
24	9.5	17	e7.2	e12	e14	31	135	437	45	13	13	19
25	10	e16	e7.2	e11	e16	33	174	441	40	12	18	19
26	11	e13	e7.0	e11	e14	38	253	428	37	12	18	17
27	13	e11	e7.8	e13	e14	42	330	439	34	13	15	18
28	13	e13	e8.8	e13	e13	35	391	440	32	18	14	17
29	14	e14	e10	e12	---	29	414	438	29	25	25	17
30	13	e14	e9.0	e12	---	28	400	384	26	21	18	17
31	16	---	e9.4	e13	---	29	---	392	---	17	15	---
TOTAL	359.8	471	267.0	337.1	445.2	797	4,287	11,800	3,601	476.2	388.5	1,114
MEAN	11.6	15.7	8.61	10.9	15.9	25.7	143	381	120	15.4	12.5	37.1
MAX	18	24	14	13	60	42	414	531	328	25	25	293
MIN	8.5	11	7.0	8.6	9.0	13	31	210	26	9.2	6.7	11
AC-FT	714	934	530	669	883	1,580	8,500	23,410	7,140	945	771	2,210
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1915 - 2003, BY WATER YEAR (WY)
MEAN	27.0	21.8	16.1	14.5	17.0	34.2	221	603	323	71.5	34.8	24.6
MAX	109	70.1	34.4	26.0	30.0	84.7	610	1,341	1,022	258	112	101
(WY)	(1987)	(1987)	(1987)	(1987)	(1962)	(1971)	(1936)	(1952)	(1957)	(1957)	(1929)	(1927)
MIN	10.1	11.1	5.00	5.00	7.50	13.9	65.9	33.8	8.22	5.17	3.75	7.53
(WY)	(1957)	(1957)	(1918)	(1918)	(1964)	(1977)	(1968)	(2002)	(2002)	(2002)	(2002)	(1956)

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR	FOR 2003 WATER YEAR	WATER YEARS 1915 - 2003
ANNUAL TOTAL	6,561.1	24,343.8
ANNUAL MEAN	18.0	66.7	118
HIGHEST ANNUAL MEAN			230 1952
LOWEST ANNUAL MEAN			18.0 2002
HIGHEST DAILY MEAN	130 Apr 15	531 May 18	2,410 May 13, 1941
LOWEST DAILY MEAN	1.7 Aug 27	6.7 Aug 20	1.7 Aug 27, 2002
ANNUAL SEVEN-DAY MINIMUM	2.3 Aug 25	7.2 Dec 19	2.3 Aug 25, 2002
MAXIMUM PEAK FLOW		655 May 17	a3,160 May 12, 1941
MAXIMUM PEAK STAGE		4.56 May 17	b5.77 May 12, 1941
ANNUAL RUNOFF (AC-FT)	13,010	48,290	85,310
10 PERCENT EXCEEDS	48	252	373
50 PERCENT EXCEEDS	11	16	25
90 PERCENT EXCEEDS	3.9	8.8	12

e Estimated. a Site and datum then in use, from rating curve extended above 1,600 ft3/s. b Maximum gage height, 6.19 ft, May 22, 1993, present site and datum.