In event the board of supervisors and the owners of such bridges cannot agree upon the price to be paid therefor, then the board of supervisors may condemn such bridge as a necessary part of the public road or highway of which said bridge connects and forms a part, and the amount to be paid for such bridge by the county shall be ascertained and determined in the manner now provided by law for the owners of land obtaining compensation for land taken for a public county road. All proceedings of the board of supervisors in assessing the amount to be paid the owners of such bridges may be reviewed by the circuit court; and the owner of such bridge so condemned by the county may appeal from the action of the board to the circuit court, where all questions of damages may be tried anew in the same respect as provided by law for appeals from action of the board of supervisors in assessing damages to the owners of land where land is taken for public county roads.