The general requirements established in this section and the Design Manual are as follows:
(A) The planning techniques, nonstructural practices, and design methods contained in the Design Manual shall be used to implement ESD to the MEP. Stormwater management plans shall be developed using ESD sizing criteria, recharge volume, water quality volume, and channel protection storage volume criteria from the Design Manual.
(B) The use of ESD planning techniques and treatment practices must be exhausted before any structural BMP is implemented. The MEP standard is met when channel stability is maintained, predeveloped groundwater recharge is replicated, nonpoint source pollution is minimized, and structural stormwater management practices are used only if determined to be absolutely necessary.
(C) Development shall comply with flood management plans as approved by the administration in accordance with the Flood Hazard Management Act of 1976 (Md. Code Ann., Environment Article, Title 5, Subtitle 8). Carroll Creek and its tributaries are designated as an interjurisdictional flood hazard watershed.
(D) The 10-year frequency storm event (QP) and the 100-year frequency storm event (Qf) must be analyzed by the applicant.
(E) Stormwater management and development plans where applicable, shall be consistent with adopted and approved watershed management plans or flood management plans as approved by the Maryland Department of the Environment (MDE) in accordance with the Flood Hazard Management Act of 1976.
(F) Alternate minimum control requirements may be adopted subject to administration approval. The administration shall require a demonstration that alternative requirements will implement ESD to the MEP and control flood damages, accelerated stream erosion, water quality, and sedimentation. Comprehensive watershed studies may also be required.
(Ord. 10-09-544, 5-20-2010; Ord. 14-23-678, 11-13-2014)