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<td>Design Level 2</td> | <td>Design Level 2</td> | ||
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<td><= 1 inch from impervious area</td> | <td><= 1 inch from impervious area</td> | ||
<td>84</td> | <td>84</td> | ||
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<td>Design Level 3</td> | <td>Design Level 3</td> | ||
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<td><= 1.5 inch from impervious area</td> | <td><= 1.5 inch from impervious area</td> | ||
<td>90</td> | <td>90</td> |
MIDS Calculator stormwater pond design level criteria related to pond volume
Link to this table
MIDS Stormwater Pond Design Level1 | Permanent Pool Volume (Vpp), ft3 | Water Quality Volume (Vwq), ft3 | Pollutant reduction (%)2 | |||
---|---|---|---|---|---|---|
TSS | TP | PP | DP | |||
Design Level 1 | ≥ 1,800 ft3 per acre of tributary area | <= 1 inch from impervious area | 60 | 34 | 62 | 0 |
Design Level 2 | <= 1 inch from impervious area | 84 | 50 | 84 | 8 | |
Design Level 3 | <= 1.5 inch from impervious area | 90 | 60 | 90 | 23 |
1From MIDS Calculator documentation for stormwater ponds. Note: the table summarizes design-level criteria related to permanent pool volume and water quality volume. The complete list of criteria for each design level is summarized on the MIDS calculator
website linked above.
2 TSS = total suspended solids; TP = total phosphorus; PP = particulate phosphorus; and DP = dissolved phosphorus. Pollutant
reduction values cited assume no upstream treatment within tributary area to pond (i.e., untreated urban runoff).