Systems

Green Street Systems follow the principals of Low Impact Development (LID) which rely on less intrusive means to manage and treat stormwater runoff. GSS systems are best suited to urban retrofit situations where existing stormwater conveyance is inefficient, ineffective, aged, or faulty. Particularly well adapted to commercial parking lots and other large paved areas, GSS systems provide better control of surface runoff laden with pollutants, such as gasoline, oil, fertilizers, pesticides, pet waste, soil, and metals. Currently we offer two systems:

The Tree Filter System
The Urban Rain Garden System

Tree Filter System

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The tree filter system consists of a granite or concrete curb frame with a choice of hardscapes or grating, such as brick, granite, concrete, pervious pavers, or metal/HDPE grating, which surrounds the tree. Stormwater enters the system along a curb opening and flows into a sediment collection sump beneath the curb. Floatable trash, sand, and sediment collect within the sump. Water then flows to the opposite side of the sediment collection sump, over a weir, and onto a three inch thick mulch layer surrounding the tree. Smaller sediment particles adhere to the mulch layer. Water moves downward through an engineered soil media and through a layer of double washed stone within a high density polyethylene (HDPE) holding chamber. The water then infiltrates through the open-bottomed holding chamber into the native soil and eventually to groundwater. During extremely heavy storm events (greater than 1 inch per hour), excess water is channeled through an overflow PVC pipe.

Urban Rain Garden

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“Urban” Rain Gardens are suitable for residential, commercial and industrial areas where efficient stormwater management is required to service drainage areas of one acre and greater. These cost effective systems are suitable for highly impervious areas where direct infiltration, coupled with traditional centralized stormwater conveyance is necessary to achieve treatment goals. These systems can also be fitted with a storage chamber and piping to allow for stormwater collection, recycling, and surface irrigation.