15.78.020 Developments must drain properly.
A. All developments must be provided with a drainage system that is adequate to prevent the undue detention or retention of surface water on the development site. Surface water will not be regarded as unduly detained or retained if:
1. The detention or retention results from a technique, practice or device deliberately installed as part of an approved sedimentation or storm water runoff control plan; or
2. The detention or retention is not substantially different in location or degree than that experienced by the development site in its pre-development state, unless such detention or retention presents a danger to health or safety.
B. No surface water may be channeled or directed into a sewer line.
C. Whenever practicable, the drainage system of a development must coordinate with and connect to the drainage systems or drainage ways on surrounding properties or streets.
D. Construction specifications for drainage swales are contained in the most recent edition of the Pierce County Road Standards. [Ord. 378 § 2 (Exh. 1), 1999.]