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In 2011, project engineers and environmental specialists assessed the environmental impacts that could result from the implementation of the I-285 top end alternatives that were developed and are currently under consideration. As a result of this effort, many historic houses and historic districts, as well as parkland were identified within the potential area of impact for the build alternatives under consideration. Because this project is being sponsored with state and federal funds, the historic resources, districts and parkland are considered Section 4(f) resources under the National Environmental Policy Act (NEPA). The Federal Highway Administration (FHWA) is required by law to protect these areas. As a result, design engineers worked to reduce the footprints of the build alternatives affecting Section 4(f) properties including elevating the alignment, tunneling the alignment, or reducing the right-of-way or lane width. All of these avoidance and minimization changes to the alignment of the alternatives result in changes to the overall project cost. So in addition to assessing alternatives to avoid adverse impacts on Section 4(f) resources, the project team also worked to update project costs.
The three areas identified in the I-285 top end corridor were Allen Park in Sandy Springs, Carver Hill Historic District/Happy Valley Historic District located on both sides of I-285 near Peachtree Industrial Boulevard, and the GM Plant.
You can view the updated alternatives here or via the interactive mapping tool.
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