KRS 181.040: Tolls may be charged -- Use of tolls to retire bonds.

In lieu of levying a tax for the retirement of such bonds any such county may, in its

discretion, collect tolls for the use of the bridge or tunnel, and all tolls collected, after

payment of the necessary cost of collection and maintenance, shall be paid t o the county

treasurer, and shall be kept in a separate fund and used solely for paying the principal and

interest on the bonds.