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<br />1,' <br />f <br /> <br />~ <br />J'; <br /> <br />~'. <br /> <br />~ <br /> <br />. <br /> <br />~: <br /> <br /> <br />~~. <br /> <br />'i< <br />-,':" <br /> <br />':{i <br />~.. <br />'v. <br /> <br />^ <br />3~. <br />:~~ <br />;~ <br /> <br />j: <br /> <br />'~ <br /> <br />i <br />:r;.; <br /> <br /> <br />. <br /> <br />DOLORES RIVER BASIN <br /> <br />. <br /> <br />259 <br /> <br />'II <br /> <br />I, <br /> <br />09172500 SAN MIGUEL RIVER NEAR PLACERVILLE, CO <br />LOCATIQN,'-Lat 38"02'33". lonq 108007'54", in NW1/4NEI/4 sec.25, T.44 N., R.12 W., San Miguel County, Hydroloqic <br />Unit 14030003. on riqht bank 1.5 mi downstream from Specie Creek in vicinity of mile marker 88.68 on State <br />Highway 145 and 4.5 mi northwest of Placerville, CO. <br />DRAINAGE AREA. -- 310 mi;l. <br />PERIOD OF RECORD.--January to December 1909, September 1910 to December 1912, April 1930 to September 1934. April <br />1942 to current year. 'Monthly discharge only for some periods. published in W$P 1313. published as "at <br />placerville." 1910,12. Statistical summary computed for 1911 to current year. <br />GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 7,030 ft above sea level, from <br />topographic map. See WSP 1713 or 1733 for history of changes prior to Oct. 21, 1958. Oct. 22, 1958 to Mar. <br />4, 1986, gage located 0.8 mi upstream from present site, at different datum. Mar. 5, 1986, gage moved to <br />present site, at present datum. <br />REMARKS. - -Estimated daily discharges: Nov. 24 to Jan. 12 and Ja.n. 17 to Feb. 21. Records good except for estimated <br />daily discharges, which are poor. Diversions for irrigation of about 1,700 acres upstream from station. One <br />diversion from Fall Creek for irrigation of about 2.000 acres in Beaver and Saltado Creek basins. One small <br />ditch diverts water from Leopard Creek to uncompahgre River basin. Slight regulation by Lake Hope and Trout <br />Lake operated by the City of Telluride, Public Service of Colorado, Pacific Light and Power Company, and Tri <br />State Power Company, combined capacity, 5.040 acre-ft. Several measurements of specific conductance and water <br />temperature were obtained and are published elsewhere in this report. <br /> <br />DAY <br /> <br />TOTAL <br />MEAN <br />MAl( <br />MIN <br />AC-FT <br /> <br />OCT <br /> <br />1 <br />2 <br />] <br />4 <br />5 <br /> <br />184 <br />145 <br />127 <br />124 <br />124 <br /> <br />NDV <br /> <br />DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995 <br />D~I~Y MEAN VALUES <br /> <br />JUL <br /> <br />106 <br />96 <br />82 <br />79 <br />95 <br /> <br />B6 <br />83 <br />B7 <br />9. <br />120 <br /> <br />10. <br />121 <br />102 <br />95 <br />.2 <br /> <br />82 <br />102 <br />96 <br />100 <br />100 <br /> <br />100 <br />101 <br />BB <br />BB <br />90 <br /> <br />2827 <br />94.2 <br />121 <br />79 <br />5610 <br /> <br />DEC <br /> <br />90 <br />BB <br />B6 <br />BB <br />B6 <br /> <br />BB <br />'0 <br />BB <br />" <br />64 <br /> <br />90 <br />88 <br />86 <br />17 <br />68 <br /> <br />62 <br />6B <br />74 <br />76 <br />72 <br /> <br />76 <br />74 <br />74 <br />76 <br />78 <br /> <br />76 <br />76 <br />76 <br />78 <br />78 <br /> <br />78 <br />76 <br />76 <br />76 <br />78 <br />78 <br /> <br />2423 <br />78.2 <br />90 <br />62 <br />4810 <br /> <br />JAN <br /> <br />2431 <br />76.4 <br />BB <br />71 <br />4820 <br /> <br />FEE <br /> <br />76 <br />74 <br />.0 <br />75 <br />75 <br /> <br />76 <br />75 <br />75 <br />7. <br />80 <br /> <br />80 <br />78 <br />71 <br />76 <br />78 <br /> <br />80 <br />.0 <br />78 <br />BB <br />'6 <br /> <br />78 <br />7' <br />.2 <br />'2 <br />78 <br /> <br />.0 <br />'0 <br />.0 <br />.0 <br />7' <br />76 <br /> <br />2325 <br />63.0 <br />92 <br />75 <br />4610 <br /> <br />78 <br />.2 <br />.2 <br />eo <br />B2 <br /> <br />64 <br />B6 <br />B6 <br />" <br />.2 <br /> <br />'0 <br />78 <br />.0 <br />64 <br />7B <br /> <br />75 <br />75 <br />76 <br />7B <br />.0 <br /> <br />B5 <br />BB <br />B6 <br />90 <br />92 <br /> <br />92 <br />90 <br />92 <br /> <br />MAl( <br /> <br />APR <br /> <br />MAY <br /> <br />450 <br />5]4 <br />52. <br />526 <br />561 <br /> <br />496 <br />435 <br />421 <br />474 <br />495 <br /> <br />562 <br />66] <br />569 <br />617 <br />.01 <br /> <br />779 <br />765 <br />745 <br />687 <br />692 <br /> <br />751 <br />851 <br />645 <br />739 <br />682 <br /> <br />597 <br />5.0 <br />543 <br />551 <br />539 <br />494 <br /> <br />18992 <br />61] <br />851 <br />421 <br />37670 <br /> <br />STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1911 1995. BY WATER YEAR (WY) <br /> <br />MEAN <br />MAl( <br />IWY) <br />MIM <br />IWY) <br /> <br />6 <br />7 <br />. <br />9 <br />10 <br /> <br />11 <br />12 <br />13 <br />14 <br />15 <br /> <br />131 <br />12] <br />120 <br />149 <br />151 <br /> <br />148 <br />139 <br />124 <br />124 <br />131 <br /> <br />126 <br />127 <br />126 <br />127 <br />123 <br /> <br />104 <br />100 <br />99 <br />114 <br />115 <br /> <br />82.8 <br />138 <br />1985 <br />51.4 <br />1990 <br /> <br />SUMMARY STATISTICS <br />ANNUAL TOTAL <br />ANNUAL MEAN <br />HIGHEST ANNUAL MEAN <br />LqwEST ANNUAL MEAN <br />HIGHEST DAILY MEAN <br />LOWEST DAILY MEAN <br />ANNUAL SEVEN-DAY MINIMUM <br />INSTANTANEOUS PEAK FLOW <br />INSTANTANEOUS PEAK STAGE <br />ANNUAL RUNOFF {AC-FT} <br />10 PERCENT EXCEEDS <br />50 PERCENT EXCEEDS <br />90 PERCENT EXCEEDS <br /> <br />16 <br />17 <br />18 <br />19 <br />2Q <br /> <br />21 <br />22 <br />2) <br />24 <br />25 <br /> <br />26 <br />27 <br />2' <br />29 <br />30 <br />31 <br /> <br />116 <br />111 <br />110 <br />109 <br />109 <br />101 <br /> <br />67.9 <br />104 <br />1987 <br />40.8 <br />1977 <br /> <br />62.2 <br />92.1 <br />1943 <br />38.3 <br />1977 <br /> <br />62.2 <br />94.2 <br />1987 <br />37.1 <br />1990 <br /> <br />FOR 1994 CALENDAR YEAR <br />74329 <br />204 <br /> <br />1160 <br />'58 <br />59 <br /> <br />147400 <br />57) <br />10] <br />62 <br /> <br />Jun 1 <br />Feb 13 <br />Feb 22 <br /> <br />89 <br />85 <br />85 <br />84 <br />.2 <br /> <br />90 <br />63 <br />70 <br />eo <br />85 <br /> <br />96 <br />109 <br />98 <br />95 <br />101 <br /> <br />110 <br />111 <br />109 <br />118 <br />146 <br /> <br />176 <br />215 <br />261 <br />296 <br />219 <br /> <br />195 <br />188 <br />226 <br />276 <br />256 <br /> <br />226 <br />236 <br />208 <br />206 <br />194 <br /> <br />16) <br />174 <br />17] <br />178 <br />161 <br /> <br />226 <br />282 <br />345 <br />404 <br />510 <br /> <br />564 <br />1515 <br />1958 <br />136 <br />1977 <br /> <br />FOR 1995 WATER YEAR <br />135541 <br />]71 <br /> <br />111 <br />124 <br />12] <br />136 <br />139 <br /> <br />152 <br />17] <br />155 <br />151 <br />137 <br /> <br />129 <br />115 <br />122 <br />116 <br />109 <br />109 <br /> <br />3413 <br />110 <br />17) <br />63 <br />6770 <br /> <br />6630 <br />221 <br />510 <br />109 <br />13150 <br /> <br />Jun 17 <br />Dec 11 <br />Dec 10 <br />Jun 17 <br />Jun 17 <br /> <br />1070 <br />1070 <br />965 <br />930 <br />94' <br /> <br />1070 <br />1280 <br />1460 <br />1530 <br />1630 <br /> <br />1730 <br />1740 <br />1650 <br />1380 <br />1460 <br /> <br />1560 <br />1560 <br />1680 <br />1640 <br />1660 <br /> <br />1650 <br />1560 <br />1310 <br />1420 <br />1440 <br /> <br />39036 <br />1301 <br />1740 <br />505 <br />77430 <br /> <br />JON <br /> <br />505 <br />614 <br />736 <br />8]] <br />935 <br /> <br />1620 <br />1390 <br />1350 <br />1120 <br />939 <br /> <br />1050 <br />1190 <br />1230 <br />1370 <br />1490 <br /> <br />1440 <br />1480 <br />1340 <br />1480 <br />1250 <br /> <br />AUC <br /> <br />615 <br />576 <br />530 <br />507 <br />517 <br /> <br />491 <br />452 <br />442 <br />447 <br />411 <br /> <br />436 <br />435 <br />444 <br />40) <br />362 <br /> <br />342 <br />]26 <br />)]2 <br />314 <br />442 <br /> <br />425 <br />421 <br />417 <br />362 <br />365 <br /> <br />376 <br />]98 <br />)57 <br />]51 <br />]21 <br />294 <br /> <br />12931 <br />417 <br />615 <br />294 <br />25650 <br /> <br />214 <br />484 <br />1983 <br />83.4 <br />1972 <br /> <br />WATER YEARS 1911 <br /> <br />I' <br /> <br />'I <br />I <br /> <br />SEP <br /> <br />276 <br />264 <br />263 <br />248 <br />234 <br /> <br />234 <br />241 <br />273 <br />287 <br />270 <br /> <br />245 <br />219 <br />201 <br />194 <br />187 <br /> <br />i <br />" <br /> <br />I' <br />., <br /> <br />:1 <br /> <br />, <br />., <br />'I' <br />,I <br />'\ <br />i <br />I! <br /> <br />3861 <br />125 <br />184 <br />99 <br />7660 <br /> <br />110 <br />]99 <br />1912 <br />50.9 <br />1957 <br /> <br />74.8 <br />129 <br />1971 <br />46.4 <br />1980 <br /> <br />230 <br />593 <br />1942 <br />79.6 <br />1951 <br /> <br />1350 <br />125.0., <br />G170, <br />1-100 <br />1120 <br />1030 <br />978 <br />932 <br />.16 <br />8]0 <br /> <br />783 <br />775 <br />756 <br />733 <br />69] <br />647 <br /> <br />34702 <br />1119 <br />1620 <br />647 <br />68830 <br /> <br />BOO <br />1528 <br />1983 <br />186 <br />1934 <br /> <br />451 <br />1197 <br />1983 <br />104 <br />1977 <br /> <br />179 <br />179 <br />167 <br />174 <br />162 <br /> <br />156 <br />149 <br />132 <br />132 <br />129 <br /> <br />128 <br />127 <br />131 <br />183 <br />166 <br /> <br />5970 <br />199 <br />287 <br />127 <br />11840 <br /> <br />139 <br />342 <br />1970 <br />63.8 <br />1956 <br />1995 <br /> <br />1983 <br />1977 <br />Jun 21 1983 <br />Jan 5 1960 <br />Dec 25 1976 <br />Jun 24 1983 <br />Jun 24 1983 <br /> <br />a-Also occurred Feb 14, 23-27. <br />b-Maximum discharge for period of record, 10000 ftlls, Sep 5, 1909, qage height not determined; result of failure <br />of Trout and Middle Reservoir Dams. <br />c-Maximum gage height far statistical period, and period of record, 8.06 ft, Jun 6, 1985. <br /> <br />1740 <br />62 <br />71 <br />2110 <br />5.28 <br />268800 <br />1110 <br />139 <br />78 <br /> <br />237 <br />414 <br />88.8 <br />2740 <br />26 <br />31 <br />b3830 <br />c6.20 <br />171500 <br />648 <br />104 <br />55 <br />