A. Three (3) copies of a report signed and sealed by a registered engineer shall be submitted with the preliminary plat, which shall present a study of the following items as pertaining to the proposed subdivision development:
1. Stormwater drainage.
2. Drainage basin map showing site boundary, on-site drainage areas and upstream off-site drainage areas.
3. Drainage area and estimated peak flow for each off-site area draining onto the site. Peak flows shall be estimated assuming fully developed conditions in the drainage basin.
4. Map showing soil types and indicating the hydrologic soil type.
5. Schematic layout of the proposed stormwater drainage system.
6. Schematic layout of the proposed sediment and erosion control measures.
7. Sufficient information to demonstrate that proposed drainage easements and street rights-of-way are wide enough to contain runoff from a one-percent (1%) AEP (one-hundred-year) storm.
8. If applicable, location and size of drainage structures or constrictions located within five hundred (500) feet downstream of the site.
9. If detention facilities are proposed, identify location of proposed detention facilities, location of discharge points and preliminary storage volume computations.
B. Wastewater Disposal.
1. Wastewater disposal systems shall meet the requirements of the rules and regulations of the Stone County Health Department. The engineering report shall include, at a minimum:
a. Lot sizes.
b. Soil limitations based on soil type, depth.
c. Topography.
d. Geologic setting.
e. Proximity to property line, stream, lake, impoundment, spring, sinkholes, caves, wells.
f. Any other information as may be required by the Stone County Health Department, or other agencies with applicable jurisdiction in review of the wastewater disposal system.
2. Subdivisions that are fifteen (15) lots or greater in size are also subject to review by the Missouri Department of Natural Resources.
C. Traffic Analysis and Street Capacity.
1. Traffic counts for each outlet from the proposed subdivision in vehicles per day.
2. Description of the types of traffic expected and the effects on existing roads.
3. The traffic analysis must extend from the proposed subdivision to the nearest arterial. Existing traffic counts may be estimated from a study of the area served by the subject road, or by actually counting vehicles consistent with good engineering practice.
4. Evaluation of the capacity of the proposed and existing road system.
5. A listing of each proposed street by name and classification. Proposed right-of-way and design specifications must be listed.
D. General Planning Information.
1. Area of development utilized by road right-of-way.
2. Area of development dedicated to open space.
3. Area of the smallest lot.
4. Area of the largest lot.
5. Schematic diagram showing significant natural features such as stands of trees, sinkholes, rock outcroppings, etc.
