A. Limitation on Modifications. A stream critical area buffer shall not be modified below the widths set forth in this section, measured from the top-of-bank:

B. Additional Content – Closed Stream Segments. Any critical areas report proposing a modification to the structure setbacks required for closed stream segments shall be based on a consideration of the impact of the modification on the feasibility of reopening the closed stream segment in the future, when compared with the feasibility of reopening the closed stream segment without the proposed modification. Where the proposed modification significantly decreases the feasibility of a future reopening, such modification shall be denied, unless the proposal includes mitigation for the functions and values that could have been achieved by reopening the stream segment. (Ord. 5680, 6-26-06, § 3)