(1) The following artificial obstructions are prohibited
within the designated floodway except as allowed by permit under ARM 36.15.602
through 36.15.604 and ARM 36.15.606:
(a) a building for living purposes or place of assembly or permanent use by human
beings;
(b) a structure or excavation that will cause water to be diverted from the
established floodway, cause erosion, obstruct the natural flow of water, or
reduce the carrying capacity of the floodway;
(c) the construction or permanent storage of any object subject to floatation or
movement during flood level periods.
(2) The following artificial obstructions are also prohibited within the designated
floodway:
(a) mobile homes and manufactured homes;
(b) commercial buildings;
(c) solid and hazardous waste disposal and individual or multiple family sewage disposal
systems;
(d) storage of toxic, flammable, hazardous, or explosive materials.