Environmental Assessment for Construction of Radial Arm Spill Gates MacDill Air Force Base, Florida
CIVIL ENGINEER SQUADRON (6TH) MACDILL AFB FL
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Background Pursuant to the Presidents Council on Environmental Quality CEQ regulations, Title 40 Code of Federal Regulations CFR Parts 1500-1508, as they implement the requirements of the National Environment Policy Act NEPA of 1969, 42 U.S.C. statute 4321 , et seq., and the Air Force Environmental Impact Analysis Process, as promulgated in 32 CFR Part 989, the USAF conducted an assessment of the potential environmental consequences associated with implementation of the following Proposed Action the construction of three sspillll control and containment structures Spill Gates. The attached Environmental Assessment EA considered all potential impacts of the proposed action and altematives, both as solitary actions and in conjunction with other proposed activities. This Finding of No Significant Impact FONSI summarizes the results of the evaluation and the conclusions regarding the significance of impacts from the Proposed Action. The Finding of No Practicable Alternative FONPA summarizes the conclusion reached regarding the location of the Proposed Action in a floodplain. Proposed Action The Proposed Action involves the construction of three Spill Gates in three stonnwater drainage ditches, designed to prevent a significant jet propulsion 8 fuel J P8 release on the aircraft apron from reaching Tampa or Hillsborough Bay. Three radial arm gates, also known as Tainter gates with riprap placed up and downstream to prevent scour, would be constructed. The gates would be composed primarily of structural coated mild steel or stainless steel. Various components of the trunnion pivot point assembly and operating equipment may be of forged or cast steel, copper alloys, or stainless steel and will be based on the final design. The Spill gates would be mounted in a reinforced concrete structure. Alternatives The Alternative to the Proposed Action considers the construction of sluice gates at nine airfield stormwater outfalls.
- Civil Engineering