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<br />STREAMFLOW
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<br />Rio Grande near Del Norte, Colo.
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<br />Location.-Water-stage recorder, lat 37041 '22", long l()6027'3S", in NWl/4 sec, 29, T.40N., R. 5 E., on right bank. 20 ft downstream from
<br />county highway bridge, 6 miles west of Del Norte, and 18 miles upstream from Pinos Creek. Datum of gage is 7,980.25 ft above
<br />mean sea level, datum of 1929. Prior to May 16, 1908, staff gage at site 4 miles downstream. Records are equivalent.
<br />DrainaV area.-l,320 sq mt, approximately.
<br />AveralZe discharlZe.-10S years (1890-1994), 902 ft] Is (653,500 acre-ft per year).
<br />Extremes.-1889-1994: Maxirnumdischarge, 18,000 ft3/sOct. 5, 1911 (gage height, 6.80 ft), from rating cu rve extended above 12,900ft3/s;
<br />minimum daily, 69 ft3 Is Aug. 21, 1902.
<br />~.-Records good except those for winter months, which are fair. Flow regulated by four reservoirs, total capacity 126,100 acre-
<br />ft, and by several smaller ones. Six transmountain diversions import water into basin above station.
<br />
<br /> Monthly and yearly discharge, in cubic feet per second
<br /> Second- Maximum Minimum Runoff in
<br />Month foot-days daily daily Mean acre-feet
<br />January 4,750 200 120 153 9,420
<br />February 4,430 210 120 158 8,790
<br />Mc'lfch 7,794 365 200 251 15,460
<br />April 17,298 1,560 2"0 577 34,310
<br />May 78,414 4,240 611 2,529 155,500
<br />June 82,800 4,220 1.790 2,760 164,200
<br />July 24.031 2,030 260 775 47,670
<br />August 8,623 4rJ7 189 278 17,100
<br />September 12,998 718 223 433 25,780
<br />October 15,316 718 416 494 30,380
<br />November 8,495 401 180 283 16,850
<br />December 7,330 300 190 236 14,540
<br />Calendar year 1994 2'n,279 4,240 120 746 540,100
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<br />Conejos River below Platoro Reservoir, Colo.
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<br />l.2QiliQn.-Water-stage recorder and concrete control, lat 37'21'18", long 106032'37', in NW1/4NW1/4 sec. 22, T. 36 N., R. 4 E., on left
<br />bank 1,100 ft downstream from valve house for Platoro Reservoir, and 0.7 mile northwest of Platoro. Datum of gage is 9,866.60 ft
<br />above mean sea level (levels by Bureau of Reclamation).
<br />DrainalZe area.-40 sq mi, approximately.
<br />AveralZe dischaflZe.-42 years (l890-1994), 929 ft3/s (67,310 acre-ft per year).
<br />Extremes.-1952-94: Maximum discharge, 1,1150 ft3 Is Nov. I, 1957; maximum gage height, 4.29 ft June 15, 1958; no flow Ckt. 16-20, 1955.
<br />~.-Records good except those for winter months, which are fair. No diversions above station. Flow completely regulated by
<br />Platoro Reservoir (capacity, 59,570 acre-ft).
<br />
<br /> Monthly and yearly discharge, in cubic feet per second
<br /> Second- Maximum Minimum Runoff in
<br />Month foot-days daily daily Mean acre-feet
<br />January 2633 95 7.3 8.49 522
<br />February 213.4 7.8 7.4 7.62 423
<br />March 248.4 8.2 7.8 8m 493
<br />April 1,040.9 159 6.8 34.7 2,060
<br />May 8,534.0 742 8.0 275 16,930
<br />June 13,342 743 93 445 26,4W
<br />July 6,257 324 126 202 12,410
<br />August 2,957 174 61 95.4 5,870
<br />September 1,635 96 24 545 3,240
<br />October 1,260.3 62 7.1 40.7 2,500
<br />November 213,0 7.1 7.1 7.10 422
<br />December 220.1 7.1 7.1 7.10 437
<br />Calendar year 1994 36,184.4 743 6.8 99.1 71,770
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