2024.12.04-Addendum 3 RU Campus Tunnel Repair 2.pdf

This is Addendum No. 3 for Radford University's Campus Tunnel Repair 2 Project (Number 217-B3217-014), dated December 4, 2024, issued by Dewberry Engineers Inc. The addendum addresses several contractor questions regarding technical specifications for the tunnel repair project, including clarifications on base plate leveling approaches, tunnel element demolition requirements, soil undercutting testing criteria, and structural shoring requirements. The document specifies that engineered concrete formwork shop drawings must be submitted for tunnel top replacement in areas 1 and 3, but not for the small patch in area 2.

Key technical clarifications include allowing alternate base plate leveling methods within 1/8" per foot tolerance, requiring protection of all existing tunnel elements during demolition work, and establishing temporary structural shoring requirements for areas 1, 3, and 4 per specific design details. The addendum also notes that if contractors choose to submit alternate shoring schemes, they must provide engineered plans for review. The document emphasizes contractor responsibility for protecting all tunnel items including piping, insulation, electrical devices, and data cabling, with contractors having been given opportunities for site visits to identify these elements.