Work to widen N.C. 150 – from the N.C. 16 Bypass in Catawba County to just west of the U.S. 21/N.C. 150 interchange in Iredell County – would be divided into two sections:
- Section A, which involves only widening N.C. 150 in Catawba County
- Section B, which involves widening N.C. 150 in Iredell County as well as improvements to both the intersection at Williamson and Bluefield roads and the I-77/N.C. 150 interchange – both in Mooresville
Following state and federal agencies reviewing the proposed project and evaluating its potential effects on the Terrell Historic District, the N.C. Department of Transportation project team selected a design option, referred to in the Environmental Assessment as Alternative 2, that would widen N.C. 150 in Catawba County and also incorporate a northern bypass around the historic district, which is protected under federal law. Another design option that was studied – Alternative 1 – would have widened N.C. 150, but would have had adverse effects on the historic district.
In addition to widening N.C. 150 in Iredell County, NCDOT also proposes building a "continuous flow intersection" in Mooresville, at the intersection of Williamson and Bluefield roads. In a continuous flow intersection, vehicles turning left cross opposing lanes of traffic at a signal-controlled crossover, before reaching the intersection.
I-77/N.C. 150 Interchange Improvements
Improvements to the I-77/N.C. 150 interchange in Mooresville would involve reconfiguring the interchange by adding lanes to N.C. 150 and to the existing on- and off-ramps as well as building overpass bridges.
Finding of No Significant Impact Approved
State and federal agencies determined in the Finding of No Significant Impact – the final environmental document approved in June 2017– that the project would not cause a significant adverse impact to the natural and human environments.