• Stake all property corners and structures, and expose any underground facilities such as pipelines or sewers.
  • Grade all trench routes to within four inches of final grade.
  • Clear all surface and subsurface obstructions to a depth of 42 inches.
  • If you are responsible for your own trench, the trench must be 36 inches deep.
  • Riser Specifications (see diagram below). The riser location will be specified by the Project Designer.
Engineering Other 1