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250 . DOLORES RIVER BASIN . 09169500 DOLORES RIVER AT BEDROCK, CO LOCATIQN,--Lat 38"18'37". long 108"53'05", in NWl./4SW1/4 see.2a. T.47 N., R.la W.. Montrose County, Hydrologic Unit 14030002, on right bank at upstream side of bridge, 0.4 mi southeast of Bedrock, and 3.1 mi upstream from East P~radox Creek. DRAINAGE AREA. - - 2,024 mi 2. WATER-DISCHARGE RECORDS PERIOD OF RECORD.--October 1917 to September 1922 (monthly discharge only for some periods, published in WSP 1313). Auqust 1971 to current year. Statistical summary computed for 1985 to current year. GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 4.940 ft above sea level, from topographic map. Prior to Aug. 1. 1971, non recording gage at different datum. REMARKS.--Estimated daily discharqes: Nov. 27 to Dec. 1, Dec. 8-11, 14-16, and Jan. 1-3, 24, 25. Records fair except for estimated daily discharges, which are poor. Diver&ions upstream from station for irrigation of about 5,000 acres upstream from station. and about 74,760 acres in the San Juan River basin. Flow regulated since Mar. 19, 1984, by McPhee Reservoir, capacity 381,000 acre-ft. EXTREMES OUTSIDE PERIOD OF RECORD. '-Flood of Sept. 6, 1910, reached a stage of 7.15 ft, present datum, from floodmarks (discharge not determined) . DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995 DAILY MEAN VALUES DAY OCT NOV 1 2 3 4 5 82 99 66 60 53 6 7 8 9 10 11 12 13 14 15 44 43 92 102 61 48 42 40 40 41 42 49 57 50 45 i\ I 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 45 45 4S 45 45 45 44 44 44 44 44 TOTAL MEAN MAX MIN AC-FT 1646 53.1 102 40 3260 1603 53.4 67 42 3180 45 45 46 50 51 53 56 51 51 51 DEe 45 53 58 61 61 65 60 50 45 42 JAN FEB 53 53 53 58 67 61 56 56 " 61 59 58 57 57 55 " 50 50 45 42 1565 50.5 65 42 3100 38 40 42 43 52 52 53 53 49 49 45 48 48 50 50 50 50 47 48 46 51 51 48 49 49 50 47 44 43 42 47 44 50 54 55 43 42 42 42 45 54 52 49 48 46 44 45 52 53 50 48 47 14.54 46.9 53 38 2880 1471 52.5 72 43 2920 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1985 MEAN 92.7 101 78.8 77 .2 89.9 MAX 257 399 254 198 181 ,'''') 1987 1987 1987 1985 1987 MIN 32.1 34 .3 29.7 31.6 45.4 ,'''') 1992 1991 1991 1991 1991 SUMMARY STATISTICS FOR 1994 CALENDAR YEAR ANNUAL TOTAL 71112 ANNUAL MEAN 211 HIGHEST ANNUAL MEAN LOWEST ANNUAL M~AN b2060 HIGHEST DAILY M~AN May 20 LOWEST DAILY MEAN 33 Feb 2 ANNUAL SEVEN-DAY MINlMUM 37 Jan 8 INSTANTANEOUS PEAK FLOW INSTANTANEOUS PEAK STAGE ANNUAL RUNOFF (AC-FT) 153000 10 PERCENT EXCEEDS 782 50 PERCENT EXCEEDS 62 90 PERCENT EXCEEDS 41 44 43 49 49 48 47 47 49 51 49 49 4' 48 48 51 61 72 62 53 52 52 55 56 56 5. 56 57 60 MAR 63 70 97 95 9l 148 145 151 167 195 366 567 614 672 611 376 321 441 755 939 '77 912 1010 1030 1050 1060 1020 lQ:3.0 1040 113C 1310 1380 1360 1420 1460 APR 1500 1410 1580 1530 1550 1870 1920 2000 2000 1890 1920 2140 2230 2210 2180 2240 255Q 2620 2580 2620 2810 2920 2940 2850 2120 2700 2690 2670 2110 2810 2610 71090 2293 2940 1470 141000 MAY 2240 182Q 1550 1540 156Q 1560 1550 1510 1630 1540 1310 1290 1290 1310 1300 1150 1610 1990 2710 2940 3100 3110 3020 2480 1800 1530 1290 1400 1360 1260 53830 1194 3110 1150 106800 1995, BY WATER YEAR (WY) 131 171 159 106 95 98 119 430 286 229 311 389 513 564 6.7 668 9l' 851 563 492 386 277 219 198 187 161 9624 310 91. 63 19090 23551 7.5 1460 145 46730 293 1064 1412 774 2551 3243 1985 1993 1993 45.2 27.6 29.8 1990 1990 1990 FOR 1995 WATER YEAR 191357 524 3110 38 43 3140 7.56 319600 1840 97 45 1972-83), 497 ft3/s; Jun 22 Jan 1 Jan 18 Jun 22 Jun 22 JUN JUL AUG SEP 1530 1960 2180 1520 1320 .31 788 810 879 '15 907 752 635 570 472 414 ~ '-I.;--' 227 218 210 202 177 162 156 150 147 145 141 141 19411 626 2180 141 38500 140 13. 118 106 106 102 100 95 .2 75 103 103 100 97 9. .8 97 9' 101 102 101 99 97 .. 10. 190 166 142 176 148 112 107 105 107 104 104 3511 115 190 97 7080 71 72 71 191 181 2535 84.5 193 68 5030 819 179 98.7 81.9 1794 626 242 171 1995 1995 1987 1986 16.4 48.0 43.8 51.1 1990 1990 1990 1991 WATER YEARS 1985 1995 a367 724 1993 53.5 1990 469Q May 5 19B6 c4.0 Jun 21 1990 d 8.6 Jun 15 1990 5230 M.y 5 1986 9.23 Apr 27 1993 265700 1220 84 3' 36010Q acre-ft/yr, prior to comp1e- a-Average discharge for 17 years 'water years 1918-22, tion of MCPhee Reservoir. b-Also occurred May 21-22. C-Minimurn daily discharge for periOd of record, no flow, Sep 13, 1974, Aug 15-18, 1978. d-Maximum discharge and stage for period of record, 9280 ft3/s, Apr 30, 1973, gage height, 12.09 ft, from f1ood- marks. 77 79 80 84 90 " 74 73 72 72 71 72 73 75 74 71 6' 6' 69 69