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MIDS Calculator stormwater pond design level criteria related to pond volume

MIDS Calculator stormwater pond design level criteria related to pond volume
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).