Site work and new construction of a bridge / tunnel in Helena, Montana. Completed plans call for the construction of a bridge / tunnel; and for site work for a bridge / tunnel.

Installation of two precast concrete box culverts, including clearing, grubbing, topsoil stripping, road crossing reconstruction, inlet and outlet protection (riprap), topsoil placement, and revegetation. The project is a continuation of the Lower D2 Ditch Flood Mitigation Project from the Helena Valley Flood Mitigation Master Plan Update 2022. Work consists of supplying and installing two 12'x6' reinforced concrete box culverts (RCB) with sloped end sections and cutoff walls. Two individual construction sites, but in close proximity to each other. Work items include, but are not limited to: clearing and grubbing, topsoil stripping, installation of the box RCB's, installation of cutoff walls, installation of sloped end sections, installation of inlet and outlet protection (riprap), placement of salvaged topsoil, revegetation of work areas. RCB's i. Two RCB's at 12'x6' ii. Glass # 1 is a full removal and restoration, and an installation downstream to a new adjacent location. iii. Glass #2 is a removal and replacement essentially in-place. Construction drawings by RESPEC Engineering, with revisions. Bonds: 10% Bid Bond, 100% Performance Bond, 100% Payment Bond. QA date - 10/19/2026 at 4:00 PM MT All questions about the meaning or intent of the Bidding documents are to be submitted to the designated point of contact in writing and must be received no later than 4:00 p.m. local time on the date listed in Section 00100 Invitation to Bid . Written comments may be submitted to Audra Zacherl by mail at: 3402 Cooney Dr, Helena, MT 59602 or email at: azacherl@lccountymt.gov, Interpretations or clarifications considered necessary by Engineer in response to such questions will be issued by Addenda delivered to all registered plan holders. Questions received less than seven days prior to the date for opening of Bids may not be answered.