The state road commissioner may, with the approval of the Governor, whenever he shall deem it expedient, purchase or condemn any toll bridge or bridges over and across any navigable river lying wholly or partly within the state, or forming a boundary of the state, or any such toll bridge or bridges wholly or partly constructed of such design or designs, and at such locations as he shall approve, or any franchises, permits, and/or contracts for the construction of any such bridge or bridges, title thereto to be taken in the name of the state; and payment of the consideration therefor, whether acquired by eminent domain or purchase, shall be solely by means of or with the proceeds of the bridge revenue bonds hereinafter authorized. The commissioner may also exercise in this state, and in any adjoining state, such powers of eminent domain as may be conferred upon him by any act of another state, or of the Congress of the United States, now in force or which may hereafter be enacted.