B&N supported the West Virginia Department of Transportation by providing full roadway and structural design for more than five and a half miles of new US Route 33 alignment. The two lane corridor includes truck climbing lanes where required and two bridges over the Middle Fork of Reedy Creek. The US Route 33 Bridge consists of three spans of prestressed concrete I beams supported by integral abutments and hammerhead type piers, while the County Route 10 Bridge is a single span prestressed concrete I beam structure set on integral abutments with a 15 degree skew. Both bridges feature five beam lines to meet structural and hydraulic needs.
The project also includes five four sided precast box culverts ranging from 60 to 325 feet in length, designed to accommodate multiple tributaries and site constraints. Three structures have 20-by 6 foot openings and are classified as bridges, while the remaining structures are 18 by 6 feet. The design accounted for numerous driveway crossings, utility relocations and right of way limitations along the corridor. Construction began in 2020 with significant earthwork and structural activity supporting safety, mobility and long term reliability for Roane County travelers.
Environmental Solutions
To meet regulatory requirements and protect waterways along the new alignment, B&N delivered a comprehensive package of environmental services. This work included NEPA documentation, survey and mapping, alternatives analysis, environmental assessment and preparation of USCOE 404/401 and NPDES SRA permits. The project required stream mitigation at four sites totaling approximately 4,000 linear feet, including relocations along the Left Fork of Reedy Creek, Tucker Run and an unnamed tributary.
B&N completed stream morphology surveys, Rosgen classification and stability assessments to inform the mitigation design. Natural channel design principles guided the solutions, incorporating rock vanes, root wad revetment, bioengineered bank stabilization and targeted plantings to enhance long term stability and habitat. One site also included a pond and wetland system to protect downstream channel integrity. HEC RAS modeling supported flood elevation predictions at the bridge crossings, ensuring structures were designed for future conditions. These combined efforts supported environmental compliance, improved stream resilience and integrated natural function into the overall corridor design.