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Cities of Dublin and Pleasanton | Disaster Debris Management Plan | 2022 <br /> <br />182 <br /> <br /> Equipment used to perform the work. <br /> <br />STUMP CONVERSION TABLE <br /> <br />Diameter to Volume Capacity <br />FEMA quantifies the number of cubic yards of debris for each size of stump based on the following <br />formula: <br />[(Stump Diameter2 x 0.7854) x Stump Length] + [(Root-Ball Diameter2 x 0.7854) x Root-Ball Height] <br />46,656 <br /> 0.7854 is one-fourth Pi and is a constant. <br /> 46,656 is used to convert cubic inches to cubic yards and is a constant. <br /> <br />The formula used to calculate the cubic yardage used the following factors, based upon findings <br />in the field: <br /> Stump diameter measured 2 feet up from the ground <br /> Stump diameter to root-ball diameter ratio of 1:3.6 <br /> Root-ball height of 31 inches <br /> <br />See the conversion chart on the following page.