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UNI V ERSITY OF MINNESOTA <br /> Mound Design Worksheet <br /> 1. SYSTEM SIZING: ... �� <br /> A. Design Flow: 600 GPD <br /> B. Soil Loading Rate: 0.60 ft2/GPD <br /> Table I <br /> C. Depth to Limiting Layer: 1.0 ft MOUND CONTOUR LOADING RATES: <br /> E. Percent Land Slope: 3.0 Measured Texture-derived Contour <br /> Perc Rate mound absorption ratio Loading <br /> F. Design Media Loading Rate: 1.2 GPD/ft2 Rate: <br /> G. Mound Absorption Ratio (1.F:1.B): 2.00 -.120 mpi . 1.0, 1.3. 2.0, 2.4, 2.6 s12 <br /> OR <br /> H. Design Contour Loading Rate: 12.0 GPD/ft =120 mpi • 5.0 s6 <br /> (From table I) <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Required Dispersal Media Area: Design Flow (1.A) :Design Media Loading Rate (1.F)=ft2 <br /> 600 GPD: 1.20 GPD/ft2= 500.0 ft2 <br /> If a larger dispersal media <br /> area is desired, enter size: ft2 <br /> B. Calculate Media Width: Contour Loading Rate (1.H) :Design Media Loading Rate (1.F)=Media Width <br /> 12.0 ft 1.2 gpd/ft2 = 10.0 ft <br /> C. Calculate Media Length: Dispersal Media Area (2.A):Media Width (2.B)=Media Length <br /> 500.0 ft2 : 10.0 ft = 50.0 ft <br /> D. Select Dispersal Media: 13 Rock ❑Chambers <br /> 0 Other Approved Media <br /> 3. ABSORPTION AREA SIZING <br /> Note:Mound setbacks are measured from the Absorption Area. <br /> A. Calculate Absorption Width:Media Width (2.B)X Mound Absorption Ratio (1.D)=Absorption Width <br /> 10.0 ft X 2.0 = 20.0 ft <br /> B. For slopes from 0 to 1%, the Absorption Width is measured from the media equally in both directions. <br /> Calculate Absorption Width Beyond the Media:Absorption Width -Media Width +2= Width beyond Media <br /> ( ft - ft) + = ft <br /> C. For slopes>1%, the Absorption Width is measured downhill from the upslope edge of the Media. <br /> Calculate Downslope Absorption Width: Absorption Width (3.A) -Media Width (2.B)=ft <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> 4. MOUND SIZING <br />