§ 2.4.2. Erosion and sediment control plan.

a.

Plans must be prepared to meet the erosion and sedimentation control requirements of Section 6 of this Development Code or through the use of more stringent, alternate design criteria which conform to sound conservation and engineering practices. Conformance with the minimum requirements may be attained through the use of design criteria in the current issue of the Manual for Erosion and Sediment Control in Georgia; or through the use of alternate design criteria that conform to sound conservation and engineering practices. The erosion and sediment control plan shall consider the interrelationship of the soil types, geological and hydrological characteristics, topography, watershed, vegetation, proposed permanent structures including roadways, constructed waterways, sediment control and storm water management facilities, local ordinances and state laws.

b.

Data Required for Erosion and Sediment Control Plan:

(1)

Narrative or notes, and other information: Notes or narrative to be located on the site plan in general notes or in erosion and sediment control notes.

(2)

Description of existing land use at project site and description of proposed project.

(3)

Name, address, and phone number of the property owner and the developer.

(4)

Name and phone number of 24-hour local contact who is responsible for erosion and sediment controls.

(5)

Size of project, or phase under construction, in acres.

(6)

Activity schedule showing anticipated starting and completion dates for the project. Include the statement in bold letters that "the installation of erosion and sediment control measures shall occur prior to or concurrent with land-disturbing activities."

(7)

Stormwater and sedimentation management systems storage capacity, hydrologic study, and calculations, including off-site drainage areas.

(8)

Vegetative plan for all temporary and permanent vegetative practices, including species, planting dates, and seeding, fertilizer, lime and mulching rates. The vegetative plan should show options for year-round seeding.

(9)

Detail drawings for all structural practices. Specifications may follow guidelines set forth in the Manual for Erosion and Sediment Control in Georgia.

(10)

Maintenance statement: "Erosion and sediment control measures will be maintained at all times. Additional erosion and sediment control measures will be installed if deemed necessary by on-site inspection."

c.

Maps, drawings and supportive computations shall bear the signature/seal of a registered or certified professional in engineering, architecture, landscape architecture, land surveying or erosion and sediment control. The certified plans shall contain:

(1)

Graphic scale and north point or arrow indicating magnetic north.

(2)

Vicinity map showing location of project and existing streets.

(3)

Boundary line survey.

(4)

Delineation of disturbed areas within project boundary.

(5)

Existing and planed contours, with contour lines drawn with an interval in accordance with the following:

Map Scale	Ground Slope	Contour Interval
1 inch = 50 ft. or larger scale	Flat 0—2%	Every 2 feet
	Rolling 2—8%	Every 5 feet
	Steep 8% +	Every 10 feet

 

(6)

Spot elevations:

(a)

For sites smaller than one acre in size, show the direction of drainage and spot elevations at all breaks in grade and along drainage channels or swales at selected points not more than 100 feet apart.

(b)

For sites of 1 acre and larger with slopes of less than two percent, show contours at intervals of not more than two feet and spot elevations at all breaks in grade along drainage channels and swales at selected points not more than 100 feet apart.

(7)

Adjacent areas and features such as streams, lakes, residential areas, etc. which might be affected should be indicated on the plan.

(8)

The limits of the 100-year flood plain and the floodway.

(9)

Proposed structures or additions to existing structures and paved areas.

(10)

The limits of any required greenway adjacent to state waters.

(11)

Delineate the 100-foot horizontal greenway along designated trout streams, where applicable.

(12)

Location of erosion and sediment control measures using coding symbols from the Manual for Erosion and Sediment Control in Georgia.

d.

Maintenance of all soil erosion and sediment control measures, whether temporary or permanent, shall be at all times the responsibility of the property owner.