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<br />RIO GRANDE COMPACT COMMISSION REPORT
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<br />Rio Chama below El Vado Dam, N. Mex.
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<br />Location.--Water-stage recorder, lat 36034'48", long 106043'24", in Tierra Amarilla Grant, on left
<br />bank 1.5 miles downstream from El Vade Dam, 2.8 miles upstream from Rio Nutrias, and 13 miles
<br />southwest of Tierra Amarilla. Datum of gage is 6,696.12 ft above mean sea level, datum of 1929.
<br />Prior to October 1935, at site 1.5 miles upstream and October 1935 to September 1938, at site
<br />1.1 miles upstream at different datums.
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<br />Drainaqe area.--877 sq mi of which about 100 sq mi is probably noncontributing.
<br />Average discharqe.--4 years (1914, 1921-23), 444 ft3js (321,700 acre-ft per year) prior to completion
<br />of El Vado Dam; 35 years (1936-70), 372 ft3js (269,500 acre-ft per year), prior to release of
<br />transmountain water; 11 years (1971-81) 389 ft3js (281,800 acre-ft per year).
<br />Extremes.--1914-16, 1920-24, 1936-81: Maximum discharge observed, 9,000 ft3js May 22, 1920 (gage
<br />helght, 12 ft); no flow Mar. 25, 26, 31, 1955.
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<br />Remarks.--Re9ords good. Diversions above station for irrigation of about 10,600 acres. Since 1935
<br />flow regulated by El Vado Reservoir and since October 1970 flow partly regulated by Heron Reservoir.
<br />SUbsequent to May 1971 flow affected by releases of transmountain water from Heron Reservoir.
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<br /> Monthly and yearly diSCharge, In cubic feet per second
<br /> Month Se cond- Maximum Minimum Mean Runoff In
<br /> foot-days daily daily acre-feet
<br />January 3,730 563 16 120 7,400
<br />February 1,618 86 26 57.8 3,210
<br />March 2,558 112 45 82.5 5,070
<br />April 8,013 846 68 267 15,890
<br />May 17,406 1,170 179 561 34,520
<br />June 22,172 1,240 256 739 43,980
<br />July 14,952 1,150 43 482 29,660
<br />August 8,155 1,010 33 263 16.180
<br />September 2,758 425 40 91. 9 5,470
<br />October 3,973 381 43 128 7,880
<br />November 2,326 229 40 77.5 4,610
<br />December 4,105 343 24 132 8,140
<br />Calendar year 1981 91,766 1,240 16 251 182,000
<br /> Rio Chama below Abiquiu Dam, N. Mex.
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<br />Location.--Water-stage recorder, lat 36014'12", long 106024'59", in SE%SE% sec. 8, T. 23 N.,
<br />R. 5 E., on right bank 0.8 mile downstream from Abiquiu Dam and 5.9 miles northwest of Abiquiu.
<br />Altitude of gage is 6,040 ft (from river-profile map and topographic map).
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<br />Drainaqe area.--2,147 sq mi of which about 100 sq mi is probably noncontributing.
<br />Averaqe discharqe.--9 years (1962-70), 376 ft3js (272,400 acre-feet per year), prior to release of
<br />transmountain water; 11 years (1971-81), 442 ft3js (320,200 acre-ft per year).
<br />Extremes.--196l-81: Maximum diSCharge, 2,990 ft3js July 1, 1965 (gage height, 6.69 ft); minimum,
<br />about 0.5 ft3js Mar. 17, 1966.
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<br />Remarks.--Records good. Flow regulated by Heron, El Vado, and Abiquiu Reservoirs. Diversions
<br />above station for irrigation of about 17,600 acres. Subsequent to May 1971 flow affected by the
<br />release of transmountain water from Heron Reservoir.
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<br /> Monthly and yearly discharge, in cubic feet per second
<br /> Month Second- Maximum Minimum Mean Runoff In
<br /> foot-days daily daily acre-feet
<br />January 4,725 642 18 152 9,370
<br />February 2,053 104 28 73.3 4,070
<br />March 3,102 139 66 100 6,150
<br />April 9,189 997 49 306 18,230
<br />May 18,011 1,400 189 581 35,720
<br />June 22,677 1, 190 299 756 44,980
<br />July 15,903 1,190 45 513 31,540
<br />August 10,194 995 47 329 20,220
<br />September 3,853 433 43 128 7,640
<br />October 4,414 358 46 142 8,760
<br />Novembe r 2,506 242 23 83.5 4,970
<br />December 4,103 381 13 132 8,140
<br />Calendar year 1981 100,730 1,400 13 276 199,800
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