
Hydro-Lock
Watertight
Box Culvert
Enhanced Box Culvert System
The Hydro-Lock system is a precast box culvert style system primarily used for underground detention or sand filter structures. Each section comes with a continuous o-ring gasket that provides a seal that is water-tight up to 30' of head pressure (per ASTM C443). Sections come to the jobsite with the gasket already attached to the joint.

Modular Design
Hydro-Lock modules can be used in single, double, or multiple runs to fit within site constraints.


Hydro-Lock modules are readily adapted for underground sand filter BMPs.
Sand Filter Capable

Internal Baffle Walls
Internal baffle walls are installed to separate internal chambers. the baffle walls can be customized to include control orifices and bypass weirs.

Multiple Sizes
The Hydro-Lock system comes in multiple sizes. See the attached chart for a list of available sizes.