15.68.140 Protected area.
A. The Protected Area is comprised of those lands that lie within the boundaries of the floodway, the riparian buffer zone, and the channel migration area.
B. In riverine areas, where a floodway has been designated in accordance with ACC 15.68.130(C), 15.68.130(D) or 15.68.150(E), the Protected Area is comprised of those lands that lie within the boundaries of the riparian buffer zone, the channel migration area, and the SFHA.
C. Riparian Buffer Zone. The riparian buffer zone includes those watercourses within the SFHA and adjacent land areas that are likely to support aquatic and riparian habitat.
1. The size and location of the riparian buffer zone is dependent on the type of water body. The riparian buffer zone includes the water body and adjacent lands, measured perpendicularly from ordinary high water mark on both sides of the water body:
a. Type S streams that are designated “shorelines of the state:” 250 feet.
b. Type F (fish bearing) streams greater than five feet wide and marine shorelines: 200 feet.
c. Type F streams less than five feet wide and lakes: 150 feet.
d. Type N (non-salmonid-bearing) perennial and seasonal streams with unstable slopes: 225 feet.
e. All other Type N (non-salmonid-bearing) perennial and seasonal streams: 150 feet.
2. The riparian buffer zone shall be delineated on the site plan by the applicant at the time of application for subdivision approval or floodplain development permit for all development proposals within 300 feet of any stream or shoreline.
D. Channel Migration Area.
1. The channel migration area shall be the channel migration zone as defined in ACC 15.68.100(K).
2. Where more than one channel migration zone has been delineated, the floodplain administrator or designee shall use the delineation that has been adopted for other local regulatory purposes.
3. Where a channel migration zone has not yet been mapped, the provisions of ACC 15.68.150(D) shall apply at the time of permit application. (Ord. 6761 § 1 (Exh. A), 2020.)