Montana Title 76. Land Resources and Use § 76-5-202. Designation of flood plains and floodways

(1) When sufficient data has been acquired by the department, the department shall establish, by order after a public hearing, the designated flood plain within which a political subdivision may establish land use regulation.

(2) When sufficient data has been acquired, the department shall establish, by order after a public hearing, the designated floodway within which a political subdivision may establish land use regulation.

(3) These designations must be based upon reasonable hydrological certainty. Designations made according to a flood hazard boundary map prepared by the federal emergency management agency have a rebuttable presumption of reasonable hydrological certainty.

(4) The department shall record all designated flood plains or designated floodways in the office of the county clerk and recorder of each county in which those flood plains or floodways are found.