All entities of local government and agencies thereof are authorized to take action as follows to facilitate recovery from the devastation of the eruption of Mt. St. Helens:
(1) Cooperate with the state, state agencies, and the United States Army Corps of Engineers and other agencies of the federal government in planning dredge site selection and dredge spoils removal;
(2) Counties and cities may re-zone areas and sites as necessary to facilitate recovery operations;
(3) Counties may manage and maintain lands involved and the deposited dredge spoils; and
(4) Local governments may assist the Army Corps of Engineers in the dredging and dredge spoils deposit operations.