23-50 31st Avenue, Queens, NY 11106 Flood Risk | Flood Form
FLOOD FORM 23-50 31 AVENUE
Queens, 11106
F
Resilience Grade
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Property Summary
High Compound Flood Exposure index.Groundwater flooding is the primary exposure factor for this property.Moderate infiltration potential — standard systems such as drywells and French drains are viable. Estimated groundwater depth of about 5' indicates a persistently shallow water table with elevated seepage potential into below-grade spaces. Property drains to the BB-029 combined sewer outfall. Site overlaps a buried historic stream — groundwater levels may rise rapidly during rain events independent of the resting water table depth; subsurface investigation is recommended before any infiltration work.
Property TypeMulti-Family Residential, Built 1925
Building Footprint1,022 SF
Roof Runoff 1" Rain637 Gallons
Elevation18'
Groundwater Depth5'
SewershedBB-029
Flood Exposure TypeScore
Sewer BackupLow
StormwaterMinimal
GroundwaterHigh
CoastalLow
Infiltration CriteriaValue
Lot Impervious Area1,622 SF
Block Impervious %65%
Soil Infiltration Rate3 IN/HR
Available Area1,657 SF
Infiltration RatingModerate
Flood Exposure TypeScore
Infiltration CriteriaValue
Sewer BackupLow
Lot Impervious Area1,622 SF
StormwaterMinimal
Block Impervious %65%
GroundwaterHigh
Soil Infiltration Rate3 IN/HR
CoastalLow
Available Area1,657 SF
Infiltration RatingModerate
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