|
How it works
Highway runoff is washed into the Hydro SwaleGard via the curbside inlet.
Gross debris and litter are screened by the inlet grate and captured between the hinged lid and perforated side walls.
Runoff flows down through the oil absorbent pouches and geotextile filter basket, which removes coarse sediments and petroleum hydrocarbons.
The filtered effluent percolates through the slotted bottom of the SwaleGard basket to an infiltration trench. Flows in excess of the infiltration rate are discharged via the outlet pipe.
Filtered effluent flows down through the base of the filter body and out to a roadside swale.
A built-in high flow bypass ensures that the Hydro SwaleGard will not hydraulically impede peak design flows of highway runoff.
Maintenance
A structured maintenance program is recommended for all Hydro Inlet Control devices. Annual maintenance plans should include:
| • |
3 system inspections |
| • |
3 Hydro SwaleGard cleanings |
| • |
1 change and disposal of filter media and oil absorbent |
Contact  - Drainage Protection Systems, Hydro's certified maintenance partner to inquire about their wide range of maintenance services. |
