07126300 PURGATOIRE RIVER NEAR THATCHER, CO
LOCATION.--Lat 37°21'23", long 103°53'59", in NW14SW14 sec.10, T.31 S., R.58 W., Las Animas County, Hydrologic Unit 11020010, on right bank 250 ft downstream from county road bridge at gas line crossing, 1.2 mi downstream from Van Bremer Arroyo, and 18 mi southeast of Thatcher.
DRAINAGE AREA.--1,791 mi2, of which 11.8 mi2 is noncontributing.
PERIOD OF RECORD.--July 1966 to current year. Statistical summary computed for 1976 to current year, subsequent to completion of Trinidad Reservoir. Daily records of specific conductance and water temperature available, December 1982 to April 1998. Daily records of suspended-sediment discharge available, May 1983 to November 1983, March 1984 to September 1992. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07126300
REVISED RECORDS.--WDR CO-01-1: Drainage area.
GAGE.--Water-stage recorder with satellite telemetry and crest-stage gages. Elevation of gage is 4,790 ft above NGVD of 1929, from topographic map.
REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow of stream affected by storage reservoirs, diversions for irrigation and municipal use, ground-water withdrawals, return flows from irrigated areas, and flows from sewage-treatment plants. Peak flows regulated to some extent by Trinidad Lake (station 07124400) 52 mi upstream since January 1975. 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.
EXTREMES OUTSIDE PERIOD OF RECORD.--Floods of July 22, 1954 and May 19, 1955, reached stages of 26.7 and 25.2 ft, respectively, from floodmarks, discharges unknown. Flood of June 18, 1965, reached a stage of 23.5 ft, from floodmarks, discharge, 47,700 ft3/s.
a Average discharge for 10 years (water years 1967-76), 37.9 ft3/s, 27,460 acre-ft/yr, prior to completion of Trinidad Dam.