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<br />STREAM FLOW
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<br />Rio Grande near Del Norte, Colo.
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<br />Localion.--Water_s!age recorder, Iat 37041'20", long 106027'30", in NWi sec.29, T.40 N., R.o E., on right bank,
<br />20 ft downstream from county highway bridge, 0 miles upstream from Pinos Creek, and 6 miles west of Del
<br />Norte. Datum of gage is 7,980.25 ft above mean Sea level, datum of 1929. Prior to May 16,1908, slaff gage
<br />at site 4 miles downstream. Records are equivalent.
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<br />Drainage area. - -1, 320 sq mi, approximately.
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<br />Average diSCharge. --75 years (1890-1964), 910 cfs (658,800 acre-ft per year).
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<br />Extremes. --1889-1964: Maximum discharge, 18,000 cis Oct. 5,1911 (gage height, 6.80 it), from rating curve
<br />extended above 6,000 cis; minimum daily, 69 cis Aug. 21, 1902.
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<br />Remarks. --Records excellent except for some winter months, which are fair. Flow regulated by four reservoirs,
<br />total capacity 126,100 acre-ft, and by several smaller ones. Six transmounlain diversions import water into
<br />basin above station.
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<br />Mo thI
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<br /> n ruy an ~ar..!L sc rge m cu lC ee ~r Becon
<br />Month Second- Maximum Minimum Mean Runoff in
<br /> foot-days daily daily Acre-feet
<br />January. 3,335 130 80 108 6,650
<br />February 3,395 135 105 117 6,730
<br />March 5,180 230 130 167 10,270
<br />April. 12,008 688 190 400 23,820
<br />May 65,869 4,140 395 2,125 130,600
<br />June 42,068 2,260 737 1,402 83,440
<br />July 15,727 729 359 507 31,190
<br />August 15,210 754 248 491 30,170
<br />September 8,554 383 208 285 16,970
<br />October. 7,168 330 174 231 14,220
<br />November. 4,604 198 120 153 9,130
<br />December. 3,470 130 95 112 6,880
<br />Calendar year 1964 186,608 4,140 80 510 370,100
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<br />Conejas River below Platoro Reservoir, Colo.
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<br />Location.--Water_slage recorder and concrete control, Iat 37021'20", long 106032'35", in NWiNWi sec.22, T.36 N.,
<br />R.4 E., on left hank 1,500 ft downstream from valVe house for Plaloro Reservoir and half a mile northwest of
<br />Platoro. Datum of gage is 9,866.60 ft above mean sea level (levels by Bureau of Reclamation).
<br />
<br />Drainage area.--40 sq mi, approximately.
<br />
<br />Average discharge.--12 years (1953-64),82.7 cfs (59,970 acre-ft per year).
<br />
<br />Extremes.--1952_64: Maximum diSCharge, 1,160 cfs Nov. 1, 1957; maximum gage height, 4.29 ft June 15,1958; no
<br />flow Oct. 16-20, 1955.
<br />
<br />Remarks.--Records good except those for winter months, which are poor. No diversions above station. Flow
<br />completely regulated by PIatoro Reservoir (capacity, 60,000 acre-it).
<br />
<br />Mo thI
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<br />n yan year~ sc ~e in cu lC ee~er secon
<br />Month Second- Maximum Minimum Mean Runoff in
<br />foot-days daily daily Acre-feet
<br />January. 310 - - 10 615
<br />February 319 - - 11 633
<br />March 341 - - 11 676
<br />April. 360 - - 12 714
<br />May 7,377.4 600 3.8 238 14,630
<br />June 7,416 550 98 247 14,710
<br />July 1,847 100 27 59.6 3,660
<br />August 3,641 322 18 117 7,220
<br />September 762 40 11 25.4 1,510
<br />October 468 32 11 15.1 928
<br />November. 4,429 576 12 148 8,780
<br />December. 372 - - 12 736
<br />Calendar year 1964 27 642.4 600 3.8 75.5 54810
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