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<br />Rio Grande near Del Norte, Colo,
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<br />Location.-Water-stage recorder, lat 37'41'22", long 106'27'38", in NW1/4 sec. 29, T, 40 N., R 5 E., on right bank, 20 It
<br />downstream Irom county highway bridge, 6 mi west 01 Del Norte, and 18 mi upstream lrom Pinos Creek. Datum 01 gage is
<br />7.980.25 It above mean sea level. datum 01 ]929, Prior to May 16, ]908. stall gage at site 4 mi downstream. Records are
<br />equivalent.
<br />Drainage area.':"1,320 sq mi, approximately.
<br />Averaee discharge,_]1I years (1890-2000), 903 It' Is (654,200 acre-It per year).
<br />Extremes.-1889-20oo, Maximum discharge, 18,000 It' /s Oct. 5, ]911 (gage height, 6.80 It), from rating curve extended above
<br />12,900 tt'ls; minimum daily, 69 It' Is Aug. 21, ]902.
<br />Remarks.--Records good except those lor winter months, which are lair. Flow regulated by lour reservoirs, total capacity
<br />126,100 acre-ft, and by severalsma1Ier ones. Six transmonntain diversions import water into basin above station.
<br />
<br /> Monthly and yearly discharge, in cubic feet per second
<br /> Second- Maximum Minimum Rnnof[ in
<br />Month foot-days daily daily Mean acre-feet
<br />January 5,810 210 160 187 11.520
<br />February 5;826 216 189 20] 11.560
<br />March 7,033 335 ]81 227 13,950
<br />April 24,452 2,090 265 815 48.500
<br />May 73,010 3.400 ],390 2.355 144.800
<br />June 34,34] 2,430 458 ],145 68,120
<br />July 9,791 443 208 316 ]9,420
<br />August 8,27] 367 ]73 267 16,410
<br />September 7,480 339 220 249 14,840
<br />October 10,24] 462 229 330 20,310
<br />November 5,987 356 155 200 11,880
<br />December 5,010 180 ]40 ]62 9,940
<br />Calendar year 2000 197,252 3,400 140 539 391,200
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<br />Conejos River below Platoro Reservoir, Colo.
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<br />Location.-Water_stage recorder and Concrete control, lat 37"21'18", long 106'32'37", inNW]/4NW]/4 sec. 22, T. 36 N., R. 4 E.,
<br />on left bank 1,100 It downstream from valve house lor Plaloro Reservoir. and 0.7 mi northwest 01 Platoro. Datum 01 gage is
<br />9,866.60 ft above mean sea level (levels by Bureau of Reclamation).
<br />Drainave area.-40 sq mi, approximately.
<br />Avera2'e discharge.-48 years (1890-2000), 93.3 ftJ /s (67,600 acre~ft per year).
<br />Extremes.-1952-2000, Maximum discharge, 1.160 It' /s Nov. ], 1957; maximum gage height, 4.29 It June ]5, ]958; no flow Oct.
<br />16-20, ]955.
<br />Remarks..-Records good except those lor winter months, which are lair. No diversions above station. Flow completely
<br />regulated by Platoro Reservoir (capacity, 59,570 acre-ft).
<br />
<br /> Monthly and yearly discharge, in cubic feel per second
<br /> Second- Ma;x:imum- Minimum Rnnoff in
<br />Month foot-days daily daily Mean acre-feet
<br />January 226.3 7.3 7.3 7.30 449
<br />February 208.8 7.2 7.2 7.20 414
<br />March 220.1 7.] 7.1 7.10 437
<br />April 1,730.6 223 7.1 57.7 3,430
<br />May 7,438 594 76 240 ]4,750
<br />June 5,820 422 90 194 11,540
<br />July 3,392 ]53 4] 109 6,730
<br />August 2,680 135 39 86.5 5,320
<br />September 762.4 42 6.7 25.4 1,510
<br />October 995.6 66 7.6 32.1 1,970
<br />November 321.7 23 7.0 10.7 638
<br />December 2]7.0 7.0 7.0 7.00 430
<br />Calel1dar year 2000 24,012.5 594 6.7 65.6 47,630
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