If the authority determines the operation of the navigational system is no longer feasible, the authority shall submit a plan to the department of administration and to the department of natural resources describing the steps the authority will take in abandoning the navigational system. The navigational system may not be abandoned unless both the department of administration and the department of natural resources determine that the plan for abandonment will preserve the public rights in the Fox River, will ensure safety, and will protect life, health, and property.