The Supreme Court expanded eminent domain to prevail over contracts the state made with private parties and further established that police power cannot be contracted away.
The state of Vermont had signed a one-hundred-year contract with the West River Bridge Company but later decided to build a free road over the toll bridge. Although the state paid the bridge company for its property and franchise, the bridge company hired the famed Daniel Webster
Contract, freedom of
Contracts clause
Police powers
Takings clause