I-81 Atkins Bridge Replacement Project. Smyth County, Virginia.
As part of the design-build team, WRA developed an approach and conceptual design that met or exceeded the technical requirements set forth in the RFP and implemented several design improvements resulting in value-added benefits to the project. Some of these design improvements included minimizing impacts to the traveling public by condensing the project limits; avoiding utility impacts by eliminating lowering US Route 11; and simplifying constructability by eliminating drainage features.
WRA’s design resulted in shorter roadway connections to I-81 on both sides of the replacement bridges, eliminating the widening of I-81 NB to the outside and significantly simplifying construction and maintenance of traffic. The refined I-81 profile improved the bridge cross slope and increased vertical clearance to easily meet the requirements over Route 11 and the railroad eliminating unnecessary reconstruction of Route 11 saving an estimated $2 million.
WRA’s design met or exceeded all RFP requirements and resulted in roadway improvements that fell completely within the existing right-of-way. The roadway geometrics assume future outside widening of I-81 and the vertical alignment facilitates this widening without any future impacts to US Route 11.
The WRA design reflected innovative drainage and stormwater management design techniques that reduced initial project cost and long-term maintenance considerations. The final project design combined multiple culverts into a single crossing of I-81 on both approaches to the bridge and eliminated eleven proposed cross pipes (directional bores) beneath I-81 and/or outlet pipes beyond the I-81 NB and SB shoulders.
WRA provided the Quality Control Manager and inspection/testing staff to perform all required QC inspection and testing to full VDOT Design-Build standards. WRA developed and implemented the Inspection and Testing Plans, maintained all QC documentation including test reports, diaries, and checklists, and coordinated with the Design-Builder, QA Team, and VDOT IA/IV to ensure compliance with the plans, specifications and all quality standards. WRA also performed scheduling services for the Design-Builder, assisting with schedule maintenance and performing monthly schedule updates.