No lands, rights-of-way, easements, or any interests in real or personal property which have been, or may be acquired for schools, churches, graveyards, municipal corporations, or subdivisions of them, or for the construction or use of any highway, railroad, railway, canal, telegraph, power line, telephone, or other public service use are exempt from condemnation. In any condemnation actions affecting properties of railroad, canal, telephone, telegraph, electric power, and other public service companies, where the companies have placed their structures across navigable streams, or canals and waterways built or to be built for purposes of navigation and hydroelectric purposes, the question of compensation and special damages, including the costs of removing, rebuilding, or relocating structures of any kind belonging to the companies on the properties, must be determined in accordance with principles of law now prevailing. No public electric utility property may be condemned unless it is located within the proposed area of any reservoir, or is needed in connection therewith for flowage purposes, or essential for the construction of any dam or reservoir or tail race or navigation channel.