Indiana Code Title 8. Utilities and Transportation § 8-16-2-1

Sec. 1. The department is hereby authorized and empowered, in its discretion, to construct a highway bridge over and across any river or other stream forming the boundary-line between the state of Indiana and any state adjoining the state of Indiana, notwithstanding the waters of such rivers or streams may not at all times extend to or reach such boundary-line, whenever such bridge or any part thereof, including the approaches thereto as a part thereof, will be within the state of Indiana and will directly connect any state or interstate highway in existence or to be constructed within the state of Indiana with any interstate or other public highway in existence or to be constructed in such adjoining state, and although such river or stream may be located either partially or wholly within the territorial limits of such adjoining state; and that, in constructing and maintaining any such bridge, including the approaches thereto as a part thereof, and in providing the necessary personal and real property and easements in real property which may be required for the proper, effective and convenient location, construction and operation of any such bridge, the department is hereby authorized and empowered to use and expend so much of the funds provided, or to be provided, by law for its use as may be found by it to be reasonably necessary for such purposes.