BaySeparator Stormwater Treatment System

Efficiently and effectively treat storm water by separating debris and trapping pollutants before they enter the waterways.

The BaySeparator is a unique hydrodynamic storm water treatment device that is an ideal solution for debris and pollutant trapping. The BaySeparator consists of two standard pre–cast manholes and the BaySeparator unit. The two manholes allow for the removal and storage of pollutants, while the BaySeparator directs the flow of water to provide the most efficient treatment possible. Standard manhole units are available in 4-foot (1.22 m), 5-foot (1.52 m), 6-foot (1.83 m) and 10-foot (3.05 m) diameters, however the primary and storage manholes may be tailored to suit any specific site conditions necessary.

  • Removal of TSS, trash, oils and hydrocarbons
  • Dual manhole design limits resuspension
  • High bypass flow rates
  • Short lead times

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Product Information

The BaySeparator offers 80 percent TSS removal, trash capture and hydrocarbon removal by relying on a dual manhole design that limits resuspension by emplying density differences and gravity to remove suspended solids and floatables from stormwater runoff.

BaySeparator Stormwater Treatment System

Model 1/2 K 1 K 3 K 5 K 10 K XK
Maximum Treatment Rate (cfs) 1.1 cfs 2.4 cfs 7.8 cfs 11.1 cfs 21.8 cfs Custom
Maximum Hydraulic Rate (cfs) 8.5 cfs 10 cfs 30 cfs 50 cfs 100 cfs Custom
Manhole Diameter inches (cm) 48 (122) 48 (122) 60 (152) 72 (182) 120 (305) Custom
Manhole Depth feet (m) 6 (1.8) 8 (2.4) 8 (2.4) 8 (2.4) 8 (2.4) Custom


Submittal Packages

1.08 Oil Spill Storage Capacities for BaySeparator Barracuda WQU June18

Case Studies/Approvals



11047 Ag Products Brochure, 07-17