Whenever the land so taken possession of, enclosed, filled in, and reclaimed under Section 5a shall lie along property not belonging to such district, and by the taking possession of, enclosing and filling in such submerged land such property shall be shut off from its access to such body of water and shall be injuriously affected thereby, such district shall pay all damages arising to such property therefrom, and in case the same cannot be agreed upon, such damages shall be ascertained in the manner provided for the acquiring of property for such district by condemnation proceedings as provided by law.