Defensible Space Flyer.

Jun 09, Minimum horizontal and vertical clearances between overhead power distribution and buildings or other structures: The Seattle City Light (SCL) Overhead Power Distribution requires a minimum horizontal and vertical clearance from buildings and structures. The purpose of this clearance is to keep the general public and workers without high voltage electrical expertise out of harms way.

Planting strip dimensions and clearances: Maintain 5 feet 0 inches clearance between the back of the sidewalk and inside edge of the curb (5 feet 6 inches to the curb face) to allow a setback for street trees measuring 3 feet 6 inches from the centerline of the tree to the curb face and 2 feet 0 inches from the centerline of the tree and sidewalk edge.

Minimum horizontal and vertical clearances between overhead power distribution and buildings or other structures: The Seattle City Light (SCL) Overhead Power Distribution requires a minimum horizontal and vertical clearance from buildings and structures. The purpose of this clearance is to keep the general public and workers without high voltage electrical expertise out of harms way.

1 This standard covers only clearances from structures/objects. For working clearances for qualified workers, see WAC For working clearances for unqualified workers, see WAC and WAC 2 For transmission lines, in addition to the additional clearance required by NESC Rule C1, Seattle City Light. New street trees shall not be located within a lined bioretention cell. If the bioretention cell is lined, provide the following horizontal clearances between the root ball of the new tree seattle tree clearances from structures the outside of the liner: Small trees: 3-foot horizontal clearance; All other trees: 5-foot horizontal clearance unless otherwise approved.