D. Trees.

D. Trees.

All lots regulated by this chapter (except those subject to §123-29.C) shall have trees in accordance with Section 1-11 below.

  1. Trees, either newly planted or existing on the lot, shall be provided at the rate of one tree per 500 square feet of disturbed area, provided that, in the case of an expansion of an existing site, credit for existing trees shall be granted only for trees which the applicant demonstrates are in excess of the requirements for the existing site under this Chapter;
  2. To be credited as landscaping, a tree shall have a caliper of at least 3" at a point six inches above the top of the root ball;
  3. Credit for landscaping shall only be given to existing trees within 70 feet of the proposed main structure(s) or parking lots;
  4. For existing trees which will be preserved, those with a caliper of 12" or more may be credited by the Board as two trees, and those with a caliper of 24" or more may be credited by the Board as four trees, provided the applicant complies with the relevant sections "4," "5," "6," "7," "8" and "9" below;
  5. To be credited as landscaping, any tree which is planted within 25 feet of a street right-of-way shall not be of a salt-sensitive species, and appropriate documentation shall be presented with the landscaping plan;
  6. A minimum of 50% of the total number of required trees for the entire site shall be located in islands and along the borders of the required parking lots(s);
  7. Lots which require traffic control islands pursuant to Section 123-23 shall locate at least 10% of the total number of required trees for the entire site within the required traffic control islands;
  8. Street trees are required to be planted as part of the landscaping required herein. Salt tolerant trees are defined in the manuals referenced in subsection 10 below, of at least 3" caliper measured at a point 6" above the root ball, shall be planted within 15 feet of the edge of the pavement of all public rights-of-way, at a rate of at least 1 tree per 50 of right-of-way. 
    Accordingly, trees should be planted 50 feet on center. Trees shall be planted between the road and the sidewalk where pratical. A minimum of 2 street trees shall be required per lot. The Planning Board shall provide guidance as to the planting location of all proposed street trees;
  9. Tree size and planting locations shall be selected so that the tree, upon reaching its mature size, shall not interfere with existing overhead utility lines, unless, as a part of the application, the overhead lines are to be relocated;
  10. Planting and transplanting of trees shall be in accordance with accepted horticultural standards, as specified in "The Planting and Care of Shade trees," (Maine Forest Service and NH Cooperative Extension Service, Bulletin No. 10, June 1985), or an equivalent technical manual approved by the Board; and
  11. Existing trees that are to be credited as landscaping shall be protected during site construction activities. A snow fence shall be erected around the tree to protect the roots from soil compression and to help prevent branches from being broken. No storage of any materials or driving of any vehicles within the fenced-in area shall be permitted. The fence shall be no closer to the trunk of the tree than 8.5 feet, and additional distance may be required if the Board deems it necessary to carry out the purposes of this section. In addition, an undisturbed 8.5-foot radius shall be preserved around each existing tree that is to be credited as landscaping, measured from the trunk.