Credit may be received on the reforestation requirement by preserving existing trees, except for the perimeter tree planting requirements as provided in Sections 1224.05 and 1224. 06, unless the location of the preserved tree is within the perimeter area.
(a) Exchange Rate. The reforestation requirement shall be credited for preserved trees at the following rate*:
Existing Crown Spread of Preserved Tree (diameter) | or | Diameter** of Tree Trunk of Preserved Tree | Number of Trees Credited |
90 ft. or greater | 36 inches or greater | 7 | |
60 - 89 ft. | 30 - 35 inches | 6 | |
50 - 59 ft. | 26 - 29 inches | 5 | |
40 - 49 ft. | 20 - 25 inches | 4 | |
30 - 39 ft. | 13 - 19 inches | 3 | |
20 - 29 ft. | 8 - 12 inches | 2 | |
16 - 19 ft. | 4 - 7 inches | 1 | |
**Measured at a height of four and one-half feet above the natural grade. Maintenance of Trees.
(b) *Crown spread measurement shall be rounded off to the nearest whole foot and the tree trunk diameter measurement shall be rounded off to the nearest whole inch. Preserved trees deemed eligible for credit shall be healthy and of such quality as is acceptable to the City Engineer. In order to maintain the tree, fifty percent of the ground area under and within the drip line of the tree shall be preserved from the tree trunk out to the edge of the drip line and shall be maintained in either vegetative landscape material or pervious surface cover, except when the City Engineer determines that lesser areas and other ground cover treatment will provide sufficient nourishment for the continued growth of the preserved tree.
(Ord. 78-27. Passed 4-25-78. )