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<br />STREAMFLOW
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<br />Rio Grande near Del NOTte. Colo.
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<br />LOcation.--Water-stage recorder, lat. 37041'22", long 106027'38". in NW\ sec. 29, T. 40 N.,
<br />R. 5 E.. on right bank, 20 ft downstream from county highway bridge, 5 miles upstream
<br />from Pinos Creek, and 6 miles west of Del NOTte. Datum of gage is 7,980.25 it above
<br />mean sea level, datum of 1929. Prior to May 16, 1908, staff gage at site 4 miles down-
<br />stream. Records are equivalent.
<br />
<br />Draina~e area.--I,320 sq mi, approximately.
<br />
<br />Avera,ge dischar~e.--8S years (1890-1974),901 cis (652,800 acre-it per year).
<br />Extremes.--1889-1974: Maximum discharge, 18,000 cis Oct. 5, 1911 (gage height, 6.80 it),
<br />from rating curve extended above 6,000 cis; minimum daily, 69 cis Aug. 21, 1902.
<br />Remarks.~-Records excellent except for some winter months, which are fair. Flow regulated by
<br />tour reservoirs, total capacity 126,100 acre-ft, and by several smaller ones. Six
<br />transmountain diversions import water into basin above station.
<br />
<br />Monthly and yearly discharge, in cubic feet per second
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<br /> Second- Maximum Minimum Runoff in
<br />Month foot-days daily daily Mean Acre-feet
<br />January 5,320 205 125 172 10,550
<br />February 4,875 200 140 174 9,670
<br />March 8,332 449 180 269 16,530
<br />April 10,924 822 198 364 21,670
<br />~[ay 59,044 2,810 762 1,905 117,100
<br />June 39,774 2,460 520 1,326 78,890
<br />July 11,595 554 258 374 23,000
<br />August 9,792 500 189 316 19,420
<br />September 5,469 237 147 182 10,850
<br />October 6,11 7 231 162 197 12.130
<br />November 4.895 212 100 163 9, no,
<br />December 4.029 175 105 130 7,990
<br />Calendar year 1974 170,166 2.810 100 466 337,500
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<br />Conejos River below Platoro Reservoir, Colo.
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<br />Location. --Nater-stage recorder and concrete control, lat 37021 t 18". long 106032 r 37", in
<br />NW~NW% sec. 22. T. 36 N., R. 4 E.. on left bank 1,100 ft downstream from valve house for
<br />Platoro Reservoir. and 0.7 mile northwest of Platoro. Datum of gage is 9,866.60 ft above
<br />mean sea level (levels by Bureau of ReClamation).
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<br />DrainaRe area.--40 sq mi, apprOXimately.
<br />
<br />Avera~e discharRe.--22 years (1953-74), 87.3 cfs (63,250 acre-ft per year).
<br />Extremes.--1952_74: Maximum discharge, 1,160 cis Nov. I, 1957; maximum gage height, 4.29
<br />tt June 15. 1958; no flow Oct. 16-20, 1955.
<br />
<br />Remarks.~-Records good except those for winter months, which are poor. No diversions
<br />above station. Flow completely regulated by P1atoro Reservoir (capacity. 60.000 acre-ft).
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<br />Monthly and yearly discharge, in cubic feet per second
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<br /> Second- Maximum Minimum Runoff in
<br />Month foot-days daily daily Mean Acre-feet
<br />January 450 15 14 14.5 893
<br />February 420 15 15 15.0 833
<br />March 465 15 15 15.0 922
<br />April 1,054 133 15 35.1 2,090
<br />May 15,258 830 64 492 30,260
<br />June 8, S80 470 167 286 17,020
<br />July 2,159 206 27 69.6 4,280
<br />Au gus t 1,502.4 194 5.1 48.5 2,980
<br />September 240.9 9.6 5.1 8.03 478
<br />October 271. 0 9.6 7.8 8.74 538
<br />November 300 10 10 10.0 595
<br />December 310 10 10 10,0 615
<br />Calendar year 1974 31,010.3 830 5.1 85,0 61,510
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