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<br />FJCHIBIT 8 <br />BOWIE NO.2 fiAINE <br />PROTECTION OF THE HYDROLOGIC BALANCE <br />STORM EVENTS <br />10 YEAR 24 HOUR EVENT <br />25 YEAR 24 HOUR EVENT <br />100 YEAR 24 HOUR EVENT <br />1.8 INCHES <br />2.1 INCHES <br />2.6 INCHES <br />The information presented for peak flow calculations is developed with the use of the <br />computer program STORM ver 6.21 The output data from the STORM program <br />computer run follows this section. <br />The upland run-off areas are shown on Map No. 20. The run-off curve numbers are <br />developed based upon vegetation and soil types. Vegetation data is presented in <br />Exhibit 5 and shown Map 3. Soils data is presented in Exhibit 7 and shown on <br />Map 4. Drainage plans are shown on Maps 21 1/4 through 21 4/4. <br /> <br />Juniper Woodland Community <br />Baseline Reference <br />Vegetative Cover % 46.0 51.4 Veg Rep. Table B-1 <br />Litter % 29.8 43.1 Ve Re Table B-1 <br />9 P <br />Ground Cover <br />------75.8---- -- <br />----94.5 <br />Table 2-2d-Runoff curve numbers for arid and semiarid rangelands <br />Cover Type -Pinyon-juniper, juniper or both, grass understory <br />Hydrologic Condition Good <br />Soil Type -Absarokee C <br />Curve Number 61 <br />1dirxed Shrub wttrtrn;r'rtcy <br />Baseline Reference <br />Vegetative Cover % 70.1 68.8 Veg Rep. Table B-2 <br />Litter % 23.5 22.8 Veg Rep. Table B-2 <br /> <br />Ground Cover% --------------- <br />93.6 ------ <br />91.6 - <br />Table 2-2d-Runoff curve numbers for avid and semiarid rangelands <br />Cover Type -Oak-aspen-mountain brush mixture <br />Hydrologic Condition Good <br />Soil Type -Absarokee C <br />Curve Number 41 <br />PR-07 EXH-8 -2 <br />2/03 <br />