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HERITAGE TREE FORMULA <br /> Location x Condition x Basal Area x Historic Factor = Point Value <br /> Minimum point value for a bigleaf maple tree = 38,200 <br /> LOCATION <br /> 5 = street adjacent yard <br /> CONDITION <br /> Condition rating given by project arborist = 50% on a scale of 1 -100. On the Heritage Tree Formula <br /> condition scale of 0 -5, 50% = rating of 2.5 <br /> 5 x 2.5 =12.5 <br /> BASAL AREA <br /> Area = 7E r dbh = 55" => radius = 27.5" A= 7E (27.5) 2 => Area = 2,376 square inches <br /> 12.5 x 2376 = 29,700 <br /> HISTORIC FACTOR <br /> (Definitions to be determined with assistance of the Historic Review Board) <br /> 1 = not significant <br /> 29,700 x 1 = 29,700 [less than minimum 38,200; Heritage tree] <br /> 2 = marginally significant <br /> 29,700 x 2 = 59.400 [greater than minimum 38,200; = Heritage tree] <br />