Peter Vivian Daniel, West River Bridge Company v. Dix…
“ A franchise, therefore, to erect a bridge, to construct a road, to keep a ferry, and to collect tolls upon them, granted by the authority of the State, we regard as occupying the same position, with respect to the paramount power and duty of the State to promote and protect the public good, as does the right of the citizen to the possession and enjoyment of his land under his patent or contract with the State, and it can no more interpose any obstruction in the way of their just exertion. Such exertion we hold to be not within the inhibition of the Constitution, and no violation of a contract. ”
