Section 12A-67 Site grading and drainage plan.

a. A drainage area map showing topography of the entire drainage basin(s) contributing to the site. The scale of the map shall be no smaller than 1 inch = 200 feet for drainage areas up to five hundred (500) acres. A topographic map of appropriate scale shall be provided for larger areas upstream from the design area. The drainage map is to show total acreage of the site and the acreage of all drainage areas contributing to the site.

b. A site plan having a scale no smaller than 1 inch = 100 feet and existing contour intervals of not more than five (5) feet. The plan shall show topographic features such as highways, utilities, natural watercourses, existing drainage facilities and structures, adjacent property lines, north arrow, scale, and vicinity map. The site plan is to also show the limits of the adopted 100 year flood plain on the site and any critical environmental areas such as streams, lakes, ponds and wetlands. Area and geological types of predominant soils as well as the nature and extent of existing vegetation shall also be shown on the plan.

a. A plan drawing that shows the limits of clearing and grading, cuts and fills, and final contours at not more than two (2) feet intervals. The plan shall identify the phasing of the grading, showing the area(s) to be denuded and the maximum time those areas will remain disturbed (not to exceed the lessor of thirty (30) working days or one hundred twenty (120) calendar days after completion of the work). The plan shall show areas to be used for storage of topsoil and excavated subsoil and plans for access to the site during wet weather. The requirements of section 12A-71 shall apply to stored stockpiles of soil.

b. A final site plan showing the location or relocation of all utilities, planned streets, roads, buildings, parking lots, and structures, and all permanent storm water management facilities.

(3) Temporary erosion and sediment control measures during active construction. a.Drawings shall be provided showing types of measures and facilities needed and the location of those measures and facilities with dimensional details. All permanent deviations in overland flow drainage patterns and the location of ingress and egress points with the planned protection provisions are to be indicated. § 12A-69

a. Drawings shall be provided showing types of measures and facilities needed and the location of those measures and facilities with dimensional details. All permanent deviations in overland flow drainage patterns are to be indicated.