§ 1143. Stormwater concept plan and consultation meeting.

The landowner or developer shall meet with representatives of the department of public development for a consultation meeting on a concept plan for the post-development stormwater management system to be used in the proposed land development project prior to submitting any stormwater management permit application. This consultation meeting shall occur at an 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 and to assess constraints, opportunities and approaches for stormwater management design prior to commencing formal site design engineering. During such consultation meetings, the city and applicant will examine the potential applicability of non-structural stormwater controls (stormwater better site design practices). Local watershed plans, as applicable, and any relevant resource protection plans will be consulted in the discussion of the concept plan.

The following information shall be included in the concept plan that shall be submitted prior to the consultation meeting:

(a)

Existing conditions/proposed site plan. Existing conditions and proposed site plan that at a minimum illustrates: existing and proposed topography; perennial and intermittent streams; predominant soils from soil surveys; boundaries of existing predominant vegetation and proposed limits of clearing and grading; and location of existing and proposed roads, buildings, structures, parking areas and all other impervious surfaces;

(b)

Natural resources inventory. A written or graphic inventory of the natural resources on the site and surrounding area as exists prior to commencement of the project. This description shall include a discussion and map of soil conditions (including erodible soils), forest cover, topography (which must include steep slopes (areas with slopes greater than 15 percent), 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, aquatic buffers and other setbacks (e.g., drinking water well setbacks, septic setbacks, etc.), natural drainage divides and patterns, natural drainage features, groundwater recharge areas, sensitive natural habitat areas, and protected river corridors. Particular attention must be afforded environmentally sensitive features that represent constraints to development;

(c)

Stormwater management system concept plan. A written or graphic concept plan of the proposed post-development stormwater management system that includes the following information: 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.

(Ord. No. 17-003 , § 1, 10-2-2017)