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Page 4 of 6 <br /> Response to Comments from March 6, 2024, DRMS Memorandum April 26, 2024 <br /> Table 1: Upper Wall Input Variables <br /> Variable JF Symbol <br /> Wall Height H= 4 ft <br /> Top Wall Thickness Bt= 2 ft <br /> Front Face Slope Sff= 1.2 vert : 1 horiz <br /> Back Face Slope Sbf= -1.2 vert : 1 horiz <br /> Wall Embedment Depth d = 2 ft <br /> Assumed to be Zero <br /> Bottom Wall Thickness Bb = 2.00 ft <br /> Surcharge Pressure q = 300 psf <br /> Soil Friction Angle — 34 deg <br /> Soil Cohesion c = 0 psf <br /> Soil Backslope Angle (X — 18.4 deg <br /> Soil Unit Weight Yr= 125 pcf <br /> Boulder Unit Weight Yb = 150 pcf <br /> Void Ratio `I= 3% <br /> Boulder Wall Net Unit Weight YW = 145.5 pcf <br /> Wall Backface Batter R — 39 deg <br /> Angle of Wall Friction g — 23 deg <br /> Table 2: Upper Wall Overturning Moment <br /> Variable Columnl Results Units <br /> Active Pressure Pa= 53.1 lb/ft <br /> Horizontal Active Pressure Ph = 51.0 lb/ft <br /> Surcharge PS 63.8 lb/ft <br /> Vertical Active Pressure Pv= -15.0 lb/ft <br /> Overturning Moment Mo= 195.5 ft*lb/ft <br /> Table 3: Upper Wall Resisting Moment Variables <br /> VariabT?mmVaIujw Units <br /> W, = 349.2 lb/ft <br /> d, = 1.3 ft <br /> W2 = 465.6 lb/ft <br /> d2 = 2.7 ft <br /> W3 = 349.2 lb/ft <br /> d3 = 4.0 ft <br /> d4 = 4.2 ft <br /> Mr= 2694.4 ft*lb/ft <br /> o:Iproject120100120119b105 documentslworking fileslwnrlwall design120119b poudre ponds wall design memo 2024-04-26.docx <br />