§ 9.6.7. Stormwater Concept Plan

A.

Discussion of post-development stormwater management. Before any stormwater management permit application is submitted, it is recommended that the landowner or developer shall meet with the Department for a consultation meeting on a concept plan for the post-development stormwater management system to be utilized in the proposed land development project. This consultation meeting shall take place at the time of the preliminary plan of subdivision or other early step in the development process. The purpose of this meeting is to discuss the post-development stormwater management measures necessary for the proposed project, as well as to discuss and assess constraints, opportunities and potential ideas for stormwater management designs before the formal site design engineering is commenced.

B.

Information to be submitted. To accomplish this goal, the following information is included in the concept plan that is submitted in advance of the meeting:

1.

Existing Conditions Proposed site plans. Existing conditions and proposed site layout sketch plans which illustrate, at a minimum, existing and proposed topography; perennial and intermittent streams; mapping of predominant soils from soil surveys (when available); boundaries of existing predominant vegetation and proposed limits of clearing and grading; and location of existing and proposed roads, buildings, parking areas and other impervious surfaces.

2.

Natural Resources Inventory A written or graphic inventory of the natural resources at the site and surrounding area as it exists prior to the commencement of the project. This description should include a discussion of soil conditions, forest cover, topography, wetlands, and other native vegetative areas on the site, as well as the location and boundaries of other natural feature protection and conservation areas such as wetlands, lakes, ponds, floodplains, stream buffers and other setbacks (e.g., drinking water well setbacks, septic setbacks, etc.). Particular attention should be paid to environmentally sensitive features that provide particular opportunities or constraints for development.

3.

Stormwater Management System Concept Plan A written or graphic concept plan of the proposed post-development stormwater management system including: preliminary selection and location of proposed structural stormwater controls; location of existing and proposed conveyance systems such as grass channels, swales, and storm drains; flow paths; location of floodplain/floodway limits; relationship of site to upstream and downstream properties and drainages; and preliminary location of proposed stream channel modifications, such as bridge or culvert crossings. Local watershed plans, the City greenspace protection plan (if applicable), and any relevant resource protection plans will be consulted in the discussion of the concept plan.

( Ord. of 4-17-2018(7) , § 9-67)