Draft Environmental Assessment FIVE MILE CREEK FLOOD MITIGATION PROJECT - PHASE II City of Tarrant, Jefferson County, Alabama September 2013
Draft Environmental Assessment FIVE MILE CREEK FLOOD MITIGATION PROJECT - PHASE II City of Tarrant, Jefferson County, Alabama September 2013///The City of Tarrant, Alabama has a long history of flooding from Five Mile Creek having experienced events as recently as 2008. The floods, while increasing in frequency over past years due to development, are similar in that the same streets and buildings continue to flood. Development in the upper Five-Mile Creek watershed near Center Point and along the Barton Branch portion of the watershed influences the magnitude of stormwater runoff in the upper portion of the watershed. The relatively low porosity of soils and the shallow depth to bedrock limit the infiltration capacity of this area. When combined with extensive development and little stormwater management construction, flooding has become a serious and frequent problem./The proposed Five Mile Creek flood mitigation project would attenuate flood waters on Five Mile Creek, to lessen the depth and extent of flooding downstream throughout the City of Tarrant. The project consists of an earthen berm constructed across Five Mile Creek at a location about 330 feet upstream of Lawson Road. The structure would retain flood waters during storm events, thereby lowering downstream water surface elevations during and after those events. The structure will be built with a trapezoidal concrete emergency spillway designed for the probable maximum flood./This Draft EA has been prepared to analyze the potential consequences to the natural and human environment associated with the Proposed Action, the No Action Alternative, and other potential alternatives per the National Environmental Policy Act (NEPA) (42 United States Code [USC] 55 parts 4321 et seq., 2000), the President’s Council on Environmental Quality (CEQ) implementing regulations (40 Code of Federal Regulations [CFR] 30 parts 1500 et seq., 2004), and 44 CFR Emergency Management and Assistance Ch. I Part 10.
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