MDOT: navigation study for Thomas Johnson Bridge done; life-cycle and permitting work next
State highway officials said navigation and riverbed mapping are complete for the Thomas Johnson Bridge replacement study; next steps include USCG preliminary determination and permit sequencing, and MDOT will seek funding for a life‑cycle cost assessment to inform timing and funding options.
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State Highway Administration staff told the commission that the navigation and riverbed mapping work for the Thomas Johnson Bridge replacement study is complete and that equipment has been installed to inform potential replacement-span height. Those studies will support a preliminary determination to the U.S. Coast Guard on horizontal and vertical clearances and are necessary before subsequent permitting (404/Army Corps, MDE) and a potential Section 9 Coast Guard permit.
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