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• <br /> BOWIE N0. I MINE <br /> VOLUME BA -POND VOLUMES <br /> PROTECTION OF THE HYDROLOGIC BALANCE <br /> LOADOUT <br />STORM EVENTS <br />10 YEAR 24 HOUR EVENT 1.7 INCHES <br />25 YEAR 24 HOUR EVENT 2.0 INCHES <br />100 YEAR 2L HOUR EVENT 2.6 INCHES <br />THE RUN-OFF CALCULATIONS PRESENTED BELOW ARE CALCULATED BASED <br />ON THE MANUAL -PROCEDURES FOR DETERMINING PEAK FLOWS IN <br />COLORADO -PUBLISHED BY THE SOIL CONSERVATION SERVICE DATED <br />MARCH 1984. <br />THE INFORMATION PRESENTED FOR PEAK FLOW CALCULATIONS IS <br />DEVELOPED WITH THE USE OF THE COMPUTER PROGRAM SEDCAD VER. 4.0. <br />THE OUTPUT DATA FROM THE SEDCAD COMPUTER PROGRAM ANALYSIS FOLLOWS <br />TH15 SECTION. <br />THE UPLAND RUN-OFF AREAS ARE SHOWN ON MAP N0. 8A-8B. THE RUN-OFF <br />CURVE NUMBERS ARE DEVELOPED BASED UPON VEGETATION AND SOIL <br />TYPES. VEGETATION DATA IS PRESENTED IN VOLUME 9A AND SHOWN ON <br />MAP 9A-. SOILS DATA 15 PRESENTED IN E%HIBIT 9 AND SHOWN ON <br />MAP 9-3. <br />• THERE ARE THREE SOIL TYPES THAT WILL BE DISTURBED. <br />THEY ARE SARATDN, TDRRIDRTHENTS, AND DELSDN. SARATON AND DELSON <br />ARE SOIL TYPE C AND TORRIORTHENTS IS A SOIL TYPE D. <br />THE VEGETATION STUDY FOR THE LOADOUT 15 LOCATED IN VOLUME 9A <br />IN THE VEGETATION TAB. <br />MI%ED SHRUB <br />COVER <br />VEGETATIVE COVER % 68.5 <br />LITTER % II.O <br />GROUND COVER % 79.5 <br />TABLE 2-2D-RUNOFF CURVE NUMBERS FOR ARID AND SEMi4RID RANGELANDS <br />COVER TYPE - 04K-ASPEN -MOUNTAIN BRUSH MI%TURE OF OAK BRUSH, ASPEN. ETC <br />HYDROLOGIC GDNDIT ION FAIR <br />$OIL TYPE - DELSON LOAM C <br />CURVE NUMBER o°p ~ f1E~•~,1~ 60 <br />0 ~ oo aooeeo ~~ <br />~ ~~ ~ S E~ ,S kN~'iRD~R'S CERTIFICATION <br />The calculations and infomtation ~~ep4~}~Sn pages W ~brN0g44v-I2 were prepared by me during the month of September 2001, and the <br />information resented is true an orterFm the best of m ""wle a and belie(. <br />p1923 y ~ q~3/ / <br />. •' _ -~ <br />e ~arxt9E. Stover, P.E. Date <br />~p eee Re~Rt~Pro(esslonal Engineer <br />•~ff eeeeaee eaee~W: o(Colorado No. 19230 <br />•:roraa~ E~'.~ <br />•~4vi0 <br />TR-37 <br />VOI 8A -Tab Pond Volumes W - ~ - To~ 301 9r~1 <br />