The applicant proposes to construct Section IIIB-Phase A of US Highway 121, which overlaps Corridor Q, and will be dual designated as US 460/121. The project involves construction of 2.8 miles of two-lane rural principal arterial highway on new alignment, with truck climbing lanes at some locations, and will cross Poplar Creek with a box culvert over which will be placed excavated material from elsewhere on the project. Proposed permanent impacts are 0.22 acres wetlands, 0.23 acres open water, 3,530 linear feet perennial streams, and 1,160 linear feet intermittent streams.