The structural and nonstructural stormwater management measures established in this chapter shall be used, either alone or in combination, in developing a stormwater management plan.
(A) Structural stormwater management practices shall be designed according to the Design Manual to satisfy the applicable minimum control requirements established in § 153.21 of this chapter.
(1) Appropriate structural practices include, but are not limited to:
(a) Detention, retention and extended detention ponds;
(b) Infiltration systems; and
(c) Filtering systems.
(2) The performance criteria specified in the Design Manual with regard to site suitability, pretreatment, geometry, and maintenance shall be considered when selecting structural stormwater management practices.
(3) Structural stormwater management practices shall be selected to accommodate the unique hydrologic conditions of the project site.
(B) Nonstructural stormwater management practices shall be applied to minimize increases in new development runoff or reduce runoff in redevelopment projects.
(1) Appropriate nonstructural practices include:
(a) Natural area conservation;
(b) Disconnection of rooftop runoff;
(c) Sheet flow to buffers;
(d) Grass channels; and
(e) Environmentally sensitive development.
(2) The use of nonstructural stormwater management practices shall be encouraged to minimize the reliance on structural BMPs.
(3) The minimum control requirements listed in § 153.21 of this chapter may be satisfied when nonstructural stormwater management practices are incorporated into site designs in accordance with the Design Manual.
(4) The use of nonstructural stormwater management practices may not conflict with existing state or local laws, ordinances, regulations, or policies.
(5) Nonstructural stormwater management practices used to satisfy the minimum control requirements must be recorded and remain unaltered by subsequent property owners. Prior approval shall be obtained before nonstructural stormwater practices are altered.
(Ord. passed 2-21-06)