Specifications include, but are not limited to: The proposed Project includes two segments of the Nebraska Highway 12 (N-12) roadway east and west of the Village of Niobrara, in Knox County, Nebraska. The west segment starts just east of Verdel and extends east approximately 6.2 miles. The east segment starts just east of Niobrara and extends east approximately six (6) miles. The highway experiences flooding and damage due to high water levels associated with the Missouri River. The purpose of the proposed project is to rehabilitate the existing roadway to maximize utilization, improve the safety and reliability, and bring the roadway up to current NDOT design standards for a major arterial highway between Verdel, Nebraska and Santee Spur (S-54D). The project is needed due to ongoing risk of flooding, unreliable operations, and interruptions to regional connectivity. The ultimate configuration will be a two-lane roadway with paved shoulders. The new alignment will be shifted north or south and elevated approximately six (6) to eight (8) feet higher than the existing to meet the design year flood elevation. Traffic will be maintained throughout construction on either the existing lanes or temporarily constructed lane(s) by the use of appropriate traffic control devices and practices. It is anticipated that there will be five bridges, six bridge-sized box culverts, along with multiple box culverts and pipe culverts that will be constructed where necessary. Right-of-Way (ROW), wetland, and stream impacts are anticipated to occur with the proposed project.
