Section 3-850 Mitigation for Soil Disturbance in the Wetland Setback
3-850.A. Mitigation Measures. The following is a list of potential mitigation measures that may be required by the Town. Notwithstanding the foregoing, other mitigation may be considered and required by the Town to mitigate the impacts to wetland setbacks:
3-850.A.1. Wetland setback area disturbance should be mitigated at a 1:1 ratio, with plantings of equal or higher value, maintaining the function and value of the impacted wetland setback area. For example, if 10,000 square feet of soil disturbance is proposed in the wetland setback, 10,000 square feet of plantings should occur to mitigate the adverse impacts.
3-850.A.2. Where less than a 25-foot setback is proposed, provide an intensively landscaped buffer of deciduous trees, coniferous trees and shrubs to mitigate the effects to the wetland area.
3-850.A.3. Where practical, dig up the existing wetland setback area vegetation, place in burlap balls and retain and preserve on the site for replanting.
3-850.A.4. Retain natural, existing topsoil of the wetland setback area to reuse in revegetation and replanting.
3-850.A.5. Time grading and construction to minimize soil exposure during periods of snowmelt and rainy periods.
3-850.A.6. Retain and protect natural vegetation; strip only the area required for construction in stages.
3-850.A.7. Infiltrate runoff from impervious surfaces by locating infiltration trenches below driplines, walkways, parking areas and driveways.
3-850.A.8. Minimize length and steepness of exposed slopes by designing with the natural topography; prevent erosion on exposed slopes by placing barriers, such as waddles.
3-850.A.9. Keep runoff velocities low to prevent high erosive powers by using flow barriers (vegetation, rip-rap, etc.).
3-850.A.10. Protect drainageways and outlets from increased flows by using appropriate materials, such as vegetation, geofabric or rip rap.
3-850.A.12. Trap sediment on-site by using waddles, filter fences and sand bags.
3-850.A.13. Any disturbed areas must be replanted with native vegetation.
3-850.A.14. Natural hydrologic flows will be maintained through the site.
3-850.A.15. Minimize earth movement by avoiding cut and fill slopes.
3-850.A.16. Any structure or fill authorized shall be properly maintained, including maintenance to ensure public safety.
3-850.A.17. Appropriate erosion and siltation controls must be used and maintained in effective operating condition during construction, and all exposed soil and other fills must be permanently stabilized at the earliest practical date.
3-850.A.18. No activity may substantially disrupt the movement of those species of aquatic life indigenous to the water body, including those species that normally migrate through the area, unless the activities primary purpose is to impound water.
3-850.A.19. Heavy equipment working in wetlands must be placed on mats or other measures must be taken to minimize soil disturbance.
3-850.A.20. Any other appropriate best management practices as deemed necessary by the Town.