Laserfiche WebLink
UNIVERSITY OF MINNESOTA <br /> • Mound Design Worksheet <br /> 1. SYSTEM SIZING: ---��✓ <br /> A. Design Flow: 750 GPD <br /> B. Soil Loading Rate: 2.00 ft2/GPD <br /> Table I <br /> C. Depth to Limiting Layer: 1.0 ft MOUND CONTOUR LOADING RATES: <br /> E. Percent Land Slope: 7.0 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): 0.60 -120 mpi 1.0, 1.3, 2.0, 2.4, 2.6 _12 <br /> OR <br /> H. Design Contour Loading Rate: 12.0 GPD/ft 1120 mpi 5.0 sb <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 /> 750 GPD : 1.20 GPDIft2= 625.0 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 /> 625.0 ft2 : 10.0 ft = 62.5 ft <br /> D. Select Dispersal Media: 0 Rock 0 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 0.6 = 6.0 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 t 2 = Width beyond Media <br /> ( ft - Jft) _ = 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 (2.8) = ft <br /> 6.0 ft - 10.0 ft = -4 ft <br /> 4. MOUND SIZING <br />