If an improved drainage facility is determined to be necessary for the general use of lot owners in the subdivision or for local neighborhood drainage needs, the subdivider shall dedicate an adequate right-of-way for such facility. (Ord. 3153 § 2 (Exh. C), 2010; Ord. 2100 § 1, 1985; Ord. 1369, 1971; prior code § 28.1102(3)).