1. Generally. The department has maintenance responsibility and capital responsibility for all bridges on state aid highways and town ways except as provided in subsection 2 or unless provided otherwise pursuant to section 566, subsection 5.
2. Low use or redundant bridges on town ways. A municipality has maintenance responsibility for all low use bridges on town ways and all redundant bridges on town ways.
For the capital improvement of a low use bridge on a town way or a redundant bridge on a town way located wholly within one municipality, the municipality shall pay 50% of the cost or 1% of its property valuation, whichever is less. For a bridge located on a town line, each municipality shall pay 25% of the cost of the capital improvement or 1% of its property valuation, whichever is less, unless the municipalities and the department agree otherwise. The department shall pay the remaining portion of the cost of the capital improvement.