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<br />36
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<br />RIO GRANDE COMPACT COMMISSION REPORT
<br />
<br />Rio Grande near Lobatoa, Colo.
<br />Location.--Water-stage recorder, lat 37oa4142lf, long 105045'22", in sec. 22, T. 33 N.,
<br />R. 11 Eo, on right bank just downstream from highway bridge, 6 miles north of Colorado-
<br />New Mexico State line, 10 miles east of Lobatos, and 14 miles east of Antonito. Datum
<br />of gage is 7,427.63 ft above mean sea level, datum of 1929.
<br />Drainage area.--7,700 sq mi, approximately (includes 2,940 sq ro1 In closed basin 1n San Luis
<br />Valley),
<br />Avera~e dlschar~e.--73 years (1900-72), 593 crs (429,600 acre-ft per year).
<br />Extremes.--1899-1972: Maximum di'scharge observed, 13,200 ef's June 8, 1905, (gage height,
<br />9,1 ft), from rating curve extended above 8,000 era; no flow at times in 1950-51, 1956.
<br />
<br />Remarks.--Records good except those ror winter months, which are fair. Natural flow of
<br />streams affected by transffiountain diversions, storage reservoirs, ground-water withdrawals
<br />and diversions for irrigation, and return flow from irrigated areas.
<br />
<br /> Monthlv and vearl dlacharcre in cubic feet ner second
<br /> Second- Maximum Minimum Runoff in
<br />Month foot-da"s dail" dall" !'<tean Acre-feet
<br />January 8,740 3"5 235 282 17,3"0
<br />February 9,899 520 255 3U 19,630
<br />March 15,669 8"0 181 505 31,080
<br />April ",633 25" 88 154 9,190
<br />May 2,176 102 55 70,2 4,320
<br />June 3,190 154 50 106 6,330
<br />July 1,265 95 21 40.8 2,510
<br />August 3,066 139 41 98.9 6,080
<br />September ",145 157 108 138 8,220
<br />October 5,587 435 67 180 11,080
<br />November llJ,041 ~~6 280 ~~~ 27,850
<br />December 9 395 260 18 630
<br />Calendar year 1972 81,806 8"0 21 224 162,300
<br />
<br />Willow Creek above Azotea Creek, near Park View, N. Mex.
<br />
<br />Lccation.--Water-stage recorder,
<br />on right bank 200 ft upstream
<br />8.3 miles southwest of Chama.
<br />
<br />lat 36048'15", long 106039'3011, in Tlerra Amarilla Grant,
<br />from Azotea Creek, 7.1 miles northwest of Park View, and
<br />Datum or gage is 7,404.00 ft above mean sea level.
<br />
<br />Draina~e area.--42 sq mi.
<br />Extrenes.--1971-72: Maximum daily disct.arge, 47 cfs Oct. 20, 1972; no rlow at times.
<br />
<br />Remarks.--Nonrecording gage prior to Nov. 18, 1971. Six-inch Parshall flume Apr. 21 to
<br />t{cv. 18.
<br />
<br /> Monthl" and "'earl dlschar"'€ in cubic feet ner second
<br /> Second- Maximum Minimum Runoff in
<br />Month foot-davs dallv dall v Mean Acre-feet
<br />January 3.73 0.55 0.08 0.12 7.4
<br />February 316.36 41 0 10.9 627
<br />March 239.54 29 ,81 7.73 "75
<br />April 12,3 1.0 .03 .41 24
<br />May 80.94 6.3 0 2.61 161
<br />June 65.20 7.9 .18 2.17 129
<br />July 13.97 2.4 .03 .45 28
<br />August 2.56 .46 0 .083 5.1
<br />September 57,78 19. 0 1. 93 115
<br />October 189.73 47 0 6.12 376
<br />November 87,"6 11 .20 2.92 173
<br />December 0 0 0 0 0
<br />Calendar year 1972 1,069.57 47 0 2.92 2,120
<br />
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