16.15.055 Determining other protected areas.
(1) Channel migration zones (CMZ) are specified by public rule adopted by the Director. When channel migration zones have not been determined, they shall be the same as the Federal Emergency Management Agency (FEMA) floodway. Waters with no defined floodway or CMZ will be considered exempt from this protected area requirement. An applicant for a development proposal may submit a critical area report to the Department to determine channel migration zone boundaries on a specific property if there is an apparent discrepancy between the site-specific conditions and the adopted channel migration zone. The regulated CMZ includes the channel migration zone boundary and extends 50 feet landward in each direction from the stream.
(2) The riparian buffer zone (RBZ) is the area in the floodplain measured perpendicularly from the OHW line on each side of the watercourse landward. The stream type determines the distance. The RBZ does not extend past the floodplain boundary. The following water typing designations and distances shall be used to determine the applicable riparian buffer zone:
(a) Type S streams that are designated “shorelines of the State”: 250 feet from the OHW line.
(b) Type F streams (fish bearing) greater than five feet wide and marine shorelines: 200 feet from the OHW line.
(c) Type F streams less than five feet wide and lakes: 150 feet from the OHW line.
(d) Type N (nonsalmonid-bearing) perennial and seasonal streams with unstable slopes: 225 feet from the OHW line.
(e) All other Type N (nonsalmonid-bearing) perennial and seasonal streams: 150 feet from the OHW line. (Ord. 12-20 § 2 (Exh. A); Ord. 06-17 § 3 (Exh. A))