2.1.1
Project boundaries, nearby structures, and other related issues can directly affect stormwater runoff and BMP designs. The following must be addressed before selecting a stormwater management BMP:
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Project Boundaries: The project boundaries typically define the limits of disturbance and can affect the thresholds and applicable minimum requirements. Project boundaries generally coincide with the right of way and/or property line.
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Setbacks: Property lines, adjacent right of way boundaries, and setbacks required from each must be identified and considered to evaluate siting of structures.
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Location of Buildings: All existing and proposed buildings must be identified, including all existing and proposed temporary and permanent structures (such as retaining walls) and impervious surfaces (driveways, patios, etc.). Structures on neighboring properties can also affect stormwater BMP selection, and shall be identified on plans as appropriate.
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Foundations and Footing Drains: The type of proposed foundations and footing drains, including location and extent, must be determined. These features can include:
- Conventional spread footings
- Pile shaft
- Basement
- Footing drains and their associated point of discharge, if applicable
- Water-tight foundation without footing drains