Table 1: Drainage Management Areas* DMA Area Surface (square feet) DMA Name Type DMA 1 Example: asphalt shingle roof DMA 2** Example: asphalt parking lot Total (square feet): * Reference map where DMAs are shown ** Extend table as necessary to list additional DMAs Include map(s) delineating DMAs. Identify, Describe, and Quantify Runoff Reduction and Structural Stormwater Control Measures This section of the SWCP is intended to document the SCMs used to address runoff within each DMA. The selection of SCMs should align with project PCRs (e.g., on-site retention, water quality treatment, peak management). Designs that store, infiltrate, and evapotranspirate stormwater, such as those associated with LID, may be required, where appropriate. Each DMA will use at least one of the following types of SCMs to address runoff: Runoff Reduction Control Measures These are non-engineered techniques – used to disperse stormwater runoff to landscape and other pervious areas within the site such as downspout disconnections that route water to a landscaped area or sloping sidewalks and pathways that direct runoff to landscaped areas. Structural SCMs These are designed and sized to achieve a specific numeric – stormwater control performance (e.g., retention, water quality treatment). Structural SCMs can include bioretention areas, pervious pavements, green roofs, cisterns, retention ponds, and infiltration basins. Small, decentralized Structural SCMs such as those associated with LID are often superior in achieving retention and natural resource protection benefits versus large, centralized conventional designs. Complete information for each applicable Performance Requirement in Tables 2 through 5 below. Note the following: For each DMA, document information related to the SCM including type (e.g., self-retaining or structural stormwater control) and location. For each DMA, document the hydrologic analyses, sizing, and resulting performance (e.g., volume treated by SCM, volume retained by the SCM) of the
Table 1: Drainage Management Areas* DMA Name Surface Type DMA Area (square feet) DMA 1 Example: asphalt shingle roof DMA 2** Example: asphalt parking lot Total (square feet): * Reference map where DMAs are shown ** Extend table as necessary to list additional DMAs Include map(s) delineating DMAs. Identify, Describe, and Quantify Runoff Reduction and Structural Stormwater Control Measures This section of the SWCP is intended to document the SCMs used to address runoff within each DMA. The selection of SCMs should align with project PCRs (e.g., on-site retention, water quality treatment, peak management). Designs that store, infiltrate, and evapotranspirate stormwater, such as those associated with LID, may be required, where appropriate. Each DMA will use at least one of the following types of SCMs to address runoff: Runoff Reduction Control Measures – These are non-engineered techniques used to disperse stormwater runoff to landscape and other pervious areas within the site such as downspout disconnections that route water to a landscaped area or sloping sidewalks and pathways that direct runoff to landscaped areas. Structural SCMs – These are designed and sized to achieve a specific numeric stormwater control performance (e.g., retention, water quality treatment). Structural SCMs can include bioretention areas, pervious pavements, green roofs, cisterns, retention ponds, and infiltration basins. Small, decentralized Structural SCMs such as those associated with LID are often superior in achieving retention and natural resource protection benefits versus large, centralized conventional designs. Complete information for each applicable Performance Requirement in Tables 2 through 5 below. Note the following: For each DMA, document information related to the SCM including type (e.g., self-retaining or structural stormwater control) and location. For each DMA, document the hydrologic analyses, sizing, and resulting performance (e.g., volume treated by SCM, volume retained by the SCM) of the
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