T.F. Green Airport Improvement Program - FEIS Chapters - PVD

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) Evaluationmitigated by providing compensatory flood storage in areas outside of the existing base flood limits whichwould also be consistent with RIDEM regulations. Under RIDEM regulations, floodplain compensation isrequired to be replaced in an incremental manner meaning that flood storage volumes lost between discreteelevations within the floodplain, such as between elevation 12 feet and 13 feet and between elevation 13 feet and14 feet, are matched by creating new floodplain storage with the same volumes between these same elevationintervals. For unavoidable floodplain impacts, RIAC will provide compensatory flood storage and may replacethe undersized Buckeye Brook culvert which causes flooding of Lakeshore Drive.Mitigation for floodplain impacts associated with Runway 34 safety enhancements would be achieved throughthe addition of floodplain storage in the upland area south of Runway 34 adjacent to Wetland A13, as describedin Section 6.9, Wetlands and Waterways, for Mitigation Site 1. This 3.0-acre wetland mitigation site will alsorestore the flood storage function associated with the floodplain area lost due to filling.6.14 Coastal ResourcesBased on the impact analysis presented in Chapter 5, Environmental Consequences, there would be no significantimpacts to coastal resources as a result of the Improvement Program and, therefore, no mitigation is required.While there is no established significance threshold for coastal resources, Alternative B4 would be designed tocomply with applicable performance standards of the Rhode Island Coastal Resources Management Plan(RICRMP), Rhode Island Soil Erosion and Sediment Control Handbook, and Rhode Island Stormwater Design andInstallation Standards Manual, and the Special Area Management Plan (SAMP) goals and objectives.6.15 FarmlandsBased on the impact analysis presented in Chapter 5, Environmental Consequences, there would be no significantimpacts to farmlands as a result of the Improvement Program. Alternative B4 would not directly, indirectly, orcumulatively impact Farmland of Statewide Importance or other regulated farmland and, therefore, nomitigation is required. The Natural Resource Conservation Service (NRCS) Farmland Conversion ImpactRating, as reported on Form AD-1006, is 74. This is well below the significance threshold identified in the FAAOrder 1050.1E, which identifies significant impacts to farmlands, as impacts to existing, intact farmland unitsthat receive a score between 200 and 260 points using Form AD 1006. Form AD-1006 has been completed by theNRCS and is included in Appendix C, Federal, State, City, and Tribal Coordination.6.16 Hazardous Materials, Pollution Prevention, and Solid WasteBased on the impact analysis presented in Chapter 5, Environmental Consequences, there would be no significantimpacts to hazardous materials, solid waste, or pollution prevention and, therefore, no mitigation is required.Alternative B4 would be designed and constructed in compliance with applicable local, state, and federal lawsand regulations concerning hazardous or solid waste management. Refer to Section 5.17.1, Regulatory Context ofChapter 5, Environmental Consequences, for the applicable local, state, and federal laws and regulations thatgovern hazardous materials and solid waste.Chapter 6 – Mitigation 6-38 July 2011\\Mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH06_Mitigation_JUL_2011.doc