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66 FLOODS OF SEPT. '970 IN ARIZ., UTAH, COLO., AND N. MEX. (28) 09352900. Vallecito Creek near Bayfield. Colo. " STATION DATA-SAN JUAN RIVER BASIN (29) 09353000. Val1ecito Reservoir near Bayfield. Colo. (Hydrologic bench-mark station) Location. --Lat 37"23'00", long 101'34'30", in swtswt sec. lB, T. 36 N.. R.6 W.. i gatehouse above outlet gates at Vallecito Dam on Los Pinos (Pine) River, 300 It (9000) left of spillway, 0.2 ooi (0. 3 km) upstream from Little Rl:'d Creek, and 11' (18 km) northeast of Bayfield. Location. --Lat 3'1"28'3911, long 107"3213511, in Nwt sec. 16, T. 37 N., R. 6 W., La Plata County, on right bank 60 [t (18 00) upstream from Fall Creek, 0.8 ooi (1.3 km) down- stream from Bear Creek, 6.7 ooi 00. 8 km) north of Vallecito Dam, and 18 mi (29 km) north of Bayfield. Gage-hei~ht record. --Water-stage recorder graph. Datum of gage is 7,580 ft (2,310 m) above mean sea level (Bureau of Reclamation bench mark); gage readir. have been reduced to elevations above mean sea level. Drainage area. --72. 1 mi2 (186.7 km2), Gage.height record. - -Water-stage reCorder graph. Datum of gage is 7,906.08 ft (2,409.773 m) above mean sea level, Maxima. --Sept. 4-18, 1970: Contents, 104,200 acre-ft (128 hm3) 0100 to 0900 hour ~ 16 (elevation, 7,656.64 ft or 2,333.744 m). 1941 to August 1970: Contents, 128,200 acre-ft (158 hm3) July 27, 1957 (elevation, 7,665. 72 ft or 2, 336. 511 m). Discharge record. -.Stage-discharge relation defined by current-meter measurements below 1.400 ft3/s (40 m3/s> and by slope-area measurement at 7,050 ft3/s (200 m3/s>. Cooperation. --Gage-height record furnished by Bureau of Reclamation. Elevation, in feet, and contents, in acre-feet, at indicated tlme, 1970, of Vallecito Reservoir near Bayfield, Colo. Maxima. --Sept. 4-18, 1970: Discharge, 7,050 ft3/s (200 m3/s) 0200 hours Sept. 6 ~ height, 6.51 ft or 1.984 m, from water-stage recorder; 6.76 It or 2.060 m, from floodmarks). 1962 to August 1970: Discharge, 1. 530 ft3/s (43. 3 m3/s) June 19, 1965 (gage height, 3.43 ft or 1. 045 m). Major floods occurred in October 1911 and June 1927. Date Sept. 3 Mean discharge, in cubic feet per second, 1970 Day Discharge Day Discharge Day Discharge Sept. 4 210 Sept. 9 308 Sept. 14 1.,260 5 1. 890 10 245 15 698 , 3,020 11 212 16 445 7 735 12 247 17 320 8 438 13 1,730 18 260 Sept. 4 Sept. Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970, of Vallecito Creek near Bayfield, Colo. Sept. 8 Haul:' Gage Discharge Hour Gage Discharge Hour Gage Discharge height height height Sept. 3 Sept. 6'1<-Con. Sept. 13* 2400 1.27 82 0600 5.19 4,260 0300 2.06 386 Sept. 4" 0730 4. 40 2,880 0600 3,00 1,150 1200 1.27 B2 0800 4.50 3,040 0800 3.70 1,920 1500 1. 40 110 1100 4.05 2,370 1100 4.35 2,800 1700 1.90 308 1130 4. 67 3,320 1200 4.10 2,440 1900 2.23 528 1400 3.60 1,800 1230 4.61 3,220 2\00 2.23 528 1800 3.48 1,570 1300 4.10 2,440 2400 2.13 452 2400 3.00 1. 150 1500 3.85 2,100 Sept. 5* Sept. 7 1800 3.80 2,040 0300 2.02 380 0300 2.83 997 2400 3.35 1,520 0600 2.02 380 0600 2.65 840 Sept. 14* 1200 1. 97 350 1200 2.46 688 0400 3.20 1.350 1400 2.61 832 1800 2.32 576 0730 3.26 1,420 1700 4.28 2,740 2400 2.25 520 1300 3.10 1. 250 1800 4.32 2,800 Sept. 11 1800 2.99 1,140 2000 4.75 3,520 2400 1. 68 192 2400 2.79 961 2200 5.94 5,800 Sept. 12' Sept. 15* 2300 5,70 5.300 1200 1. 65 180 1200 2.46 680 2400 6.04 6,000 1600 I. 64 176 2400 2.27 528 S<.'pt. 6' 1800 1.79 236 0200 6.51 7, 050 2030 2.25 520 0400 5.71 5,300 2400 2.08 398 Sept. 7 Sept. 8 Sl"pt. 12 Hour 2400 1200 1800 2400 1000 1400 1800 2400 1200 2400 1200 2400 1200 2400 2400 7,643.87 Elevation Contents 73,540 Sept. 13 7,643.70 7,643.68 7,643.70 7,643.75 7,643.82 7,644.03 7,645.30 7,648.60 7,649.93 7,650.63 7,651.20 7,651. 65 7,651. 94 7,652.32 Date 73,160 73,120 73,160 Sept. 14 73,270 73.430 73,900 Sept. 15 76,770 84,440 87,610 Sept. 16 ,89,300 90,680 Sept. 17 9],780 92,480 Sept. 18 93,420 Hour 0600 0900 1200 2400 1200 2400 1200 1800 2400 0300 1200 2400 1200 2400 1200 2400 Elevation Conter 7,652.38 7,652.55 7,652,96 7,654.53 93,5 93,S 94, !:: 98,S 7,655.53 7,656.17 101.4 103,( 7,656.50 7,656.61 7,656.63 103, ~ 104,2 104,2 7,656.64 7,656.60 7,656.52 ]04, ~ 104, l 103, f 7,656.35 7,656.17 103, ~ 103, { 7,655.95 7,655.69 102, ~ 101,! (30) 09353500. Los Pinos River near Bayfie1d, Colo. (l.ocally known as Pine River) Location. --Lat 37<'22'58", long 107034'37", in swt sec. 18, T. 36 N., R. 6 W., La County, on left side of outlet flume from Vallecito Reservoit-, 0.2 mi (0. 3 km) u stream from Little Red Creek, 2 mi (3 km) upstream from Red Creek, and 11 m (18 km) north of Bayfield. DrainaRe area. --270 mi2 (700 km2), approximately, Gage-heiRht record. --Water~stage recorder graph. Datum of gage is 7,582.54 ft (2.311. 158 m) above mean sea level (Bureau of aeclamation bench mark). * Daily means computed from data 10 addItion to flgures shown. Qischal:'ge record. --Stage-discharge relation defined by current-meter measureme below 1. 400 ft3{s (40 m3/$).