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PROTECTION OF THE HYDROLOGIC BALANCE <br />TEMPORARY SEDIMENT BASIN <br />BOWIE LOADOUT <br />STORM EVENTS <br /> 10 YEAR 24 HOUR EVENT 1.8 INCHES <br /> 25 YEAR 24 HOUR EVENT 2.1 INCHES <br />100 YEAR 24 HOUR EVENT 2.6 INCHES <br />The runoff curve numbers are developed based upon vegetation and soil types. Vegetation <br />data is shown in Volume 7, on Map-02, and Soils data are shown on Map-03. <br />CURVE NUMBERS <br />Undisturbed <br />Table 2-2d-Runoff curve numbers for arid and semiarid rangelands <br />Cover Type - Herbaceous-mixture of grass, weeds and brush <br />Hydrologic Condition Good <br />Soil Type - Loam C <br />Curve Number 74 <br />Disturbed-Poor <br />Table 2-2d-Runoff curve numbers for urban areas <br />Cover Type - Impervious, parking lots, roofs, driveways <br />Hydrologic Condition Poor <br />Soil Type - Loam C <br />Curve Number 98 <br />Disturbed-Fair <br />Table 2-2d-Runoff curve numbers for urban areas <br />Cover Type - Herbaceous-mixture of grass, weeds and brush <br />Hydrologic Condition Poor <br />Soil Type - Loam C <br />Curve Number 79 <br />MR-141 SAE-11 10/24