Projects intended to reestablish the terrestrial and aquatic attributes of a natural stream, and not for protection of a structure or development, provided, in addition to the requirements of § 153.076, that:
(A) The project will not increase velocity or erosion upstream, downstream, across from, or adjacent to the site;
(B) Materials may include, but are not limited to, boulders, rock cobble, gravel, native stream bed materials, root wads, brush mattresses, willow wattles, natural woody debris, or combinations of analogous materials, and that reasonably replicates the bed and bank of the natural stream;
(C) Erosion, sedimentation, and transport of the materials are not more than the amount and rate of existing natural stream banks during the base flood; and
(D) The project may be designed to allow vegetative materials to mature within a period up to five years, or other time as required by the Floodplain Administrator. Once vegetation is mature and established, it should not require substantial yearly maintenance after the initial period.
(Prior Code, § 11-2(9.14))
Statutory reference:
Stream and bank restoration in the floodway, see ARM § 36.15.606(1)(b)