(A) The perimeter control plan shall include measures to prevent sediment from leaving the site during initial disturbance activities and prior to temporary or permanent erosion prevention and/or sediment control practices.
(B) The perimeter control plan shall address downstream outfall points.
(C) The perimeter control plan shall address prevention of sediment deposition on properties adjacent to the project site. Well vegetated buffer strips along lower perimeters, sediment barriers, filters, diversion berms, sediment basins or other means accepted by the town may all be employed or combined to adequately protect adjacent properties.
(D) Selection of sediment control measures shall consider the type of flow, site terrain, soil type, and other relevant factors. Buffer strips may only be utilized for sheet flow and must be at least, but not limited to, 25 feet in width. If ineffective, a single sediment control device shall be supplemented with additional perimeter controls.
(E) The perimeter control plan shall address stabilizing construction entrances/exits to reduce the amount of sediment transported onto nearby roadways, and potentially into waterways. When crossing into a public right-of-way, alley, sidewalk or parking lot, traffic shall first pass over a stabilized stone pad. This pad shall be at least six inches thick, 100 feet long, and contain two- to three-inch crushed coarse graded stone. If operating under seasonally wet conditions and/or soft soils, filter fabric shall underlie the stabilized stone pad.
(F) The perimeter control plan shall address protection of outlets such as pipes, drains, culverts, conduits or channels and significantly minimize erosion and sedimentation by reducing the velocity of flows from the project site. The placement of rock, grouted rip-rap, or concrete rubble at the outlet of a pipe prevents scour of the soil around the culvert mouth caused by high pipe flow velocities. These BMPs dissipate flow energy to produce non-erosive velocities.
(Ord. 2004-SW-02, passed 11-9-04)