AIRPORTS DESK REFERENCE
occur when the severity of construction impacts cannot be mitigated below FAA’s threshold levels for the affected resource.
b. Mitigation. During the environmental review process, agencies having jurisdiction or special expertise about affected resources normally provide letters addressing impacts on those resources. Often, those letters include recommended measures to mitigate those effects. An appendix to the environmental document should include copies of those letters. The environmental document should summarize the most important information in those letters and accurately cross-reference the appendix and pages in the appendix for further information.
(1) If the FAA or the sponsor does not adopt any recommended mitigation, the environmental document should clearly explain why the recommendation was not adopted. If feasible, provide an estimated schedule for undertaking accepted construction mitigation.
(2) All on-site construction activities must be conducted in accordance with FAA AC 150/5370-10, Standards for Specifying Construction of Airports, and by using best management practices (BMPs). These measures must be considered throughout the preparation of plans and specifications for each construction project. The construction contractor should meet the adopted plans and specifications throughout the project construction period. Implementing these measures will prevent or minimize most potential construction-related impacts to the environment and surrounding community. FAA AC 150/5370-10, Item P-156, provides further information on potential mitigation measures.
ENVIRONMENTAL IMPACT STATEMENT CONTENT.
General. Sometimes, construction impacts alone due to airport construction
may cause a significant impact identified and the impacts cannot be avoided or mitigated below the applicable significance threshold(s) for the affected resource. In those cases, FAA must prepare an EIS addressing the impacts. Where appropriate the EIS should contain a discussion of the concerns resource agencies identified and the reasons why impacts cannot be mitigated below an applicable threshold (e.g., where the Fish and Wildlife Service has prepared a Jeopardy Biological Opinion).
b. Mitigation. The EIS should describe proposed mitigation when expertise agencies provide that information. FAA should fully consider the mitigation and balance its benefits against those of the proposed action. If feasible, the EIS should also provide an estimated schedule for undertaking accepted mitigation and explain why the sponsor or FAA does not adopt any mitigation a resource agency recommends.