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<br />Locatlon.--water_stage recorder, lat 37041'22", long ID6'27'3B", in NW, sec. 29, T. 40 N., R. 5 E.,
<br />on right bank, 20 ft downstream from county highway bridge, 6 miles West of Del Norte, and
<br />6.B miles upstream from Pinos Creek. Datum of gage Is 7,9BD.25 ft above mean sea level, datum
<br />of 1929. Prior to May 16, 19DB, staff gage at site 4 miles downstream. Records are equivalent.
<br />
<br />Rio Grande near Del Norte, Colo.
<br />
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<br />
<br />Drainaqe area.--l,320 sq mi, approximately.
<br />Average dlscharge.-_92 years (IB9D-19Bl), B95 ft3/s (64B,4DD acre-ft per year).
<br />Extremes.--lBB9-19B1, Maximum disCharge, IB,DDO ft3/s Oct. 5, 1911 (gage height, 6.BO ft), from
<br />rating CUrve extended above 12,900 ft Is, minimum dally, 69 ft3/s Aug. 21, 1902.
<br />
<br />'.',".
<br />
<br />RemarkS.--Records good except thOse for winter months, which are fair. Flow regulated by four
<br />reservoirs, total capacity 126,100 acre-ft, and by several smaller ones. Six transmountain
<br />diversions import water into basin above station.
<br />
<br /> Month Se cond- Maximl.ll1l. f.linimum Mean RUnoff in
<br /> foot-days daily daily acre-feet
<br />January 5,175 IB5 155 167 10,260
<br />February 4,657 IB5 145 166 9,240
<br />March 5,364 2DB 15B 173 10,640
<br />April 15,888 1,390 155 530 31,510
<br />May 45,198 2,590 B04 1,458 89,650
<br />June 52,029 3,270 4BB 1,734 103,200
<br />July 18,695 974 340 603 37,080
<br />August 13,271 745 320 428 26,320
<br />September 11,685 494 290 390 23,180
<br />October 18,627 1,010 335 601 36,950
<br />Novembe r 9,426 455 195 314 18,700
<br />December 6,457 268 150 'DB 12,810
<br />Calendar year 1981 206,472 3,270 145 566 409,500
<br />
<br />Monthly and yearly diSCharge, in cubic feet per second
<br />
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<br />LOcation.--Water_stage recorder and Concrete control, lat 37021'lB", long 106'32'37", in NW,NW,
<br />sec. 22, T. 36 N., R. 4 E., on left bank 1,100 ft downstream from valve house for Platoro
<br />Reservoir, and 0.7 mile northwest of Platoro. Datum of gage Is 9,B66.6D ft abOve mean sea
<br />level (levels by BUreau of Reclamation).
<br />
<br />Conejos River below Platoro ReserVOir, Colo.
<br />
<br />Drainage area.--40 sq mi, apprOXimately.
<br />Averaqe discharqe.-_29 years (1953-Bl), BB.3 ft3/s (63,970 acre-ft per year).
<br />
<br />Extremes.--1952_81:
<br />June 15, 1958; no
<br />
<br />Maximum diSCharge, 1,160 ft3js Nov. 1, 1957;' maximum gage
<br />flow Oct. 16-20, 1955.
<br />
<br />height, 4.29 ft
<br />
<br />Remarks.--Records good except those for winter months, which are fair. No diversions abOve
<br />station. Flow completely regulated by Platoro Reservoir (capaCity, 59,570 acre-ft).
<br />
<br /> Month Second- Maximum Minimum Mean Runoff In
<br /> foot-days daily daily acre-feet
<br />January 160.0 7.5 4.0 5.16 317
<br />Feburary 163.0 7.0 5.0 5.82 323
<br />March 256.5 10 5.0 8.27 509
<br />April 1,929.5 442 B.D 64.3 3,830
<br />May 5,489 3B6 69 177 10,890
<br />June 8,451 636 B2 2B2 16,760
<br />July 1,617 104 13 52.2 3,210
<br />August 851. 3 54 7.4 27.5 1,690
<br />September 1,197 85 22 39.9 2,370
<br />October 2,089 182 18 67.4 4,140
<br />November 776 37 14 25.9 1,540
<br />December 434 14 14 14.0 B61
<br />Calendar year 1981 23,413.3 636 4.0 64.1 46,440
<br />
<br />Monthly and yearly diSCharge, in cubic feet per second
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