If the communications company proposes to build a tower (as opposed to mounting the antenna on an existing structure), it is required to demonstrate that it contacted the owners of tall structures within a one-quarter-mile radius of the site proposed, asked for permission to install the antenna on those structures, and was denied for reasons other than economic ones. This would include smokestacks, water towers, tall buildings, antenna support structures of other communications companies, other communications towers (fire, police, etc.), and other tall structures. Slippery Rock Borough may deny the application to construct a new tower if the applicant has not made a good faith effort to mount the antenna on an existing structure.