seepage bed

seepage bed

seepage bed
A trench usually exceeding 36 in. (approx. 1 m) in width containing clean, coarse aggregate and a system of distribution piping through which treated sewage may seep into the surrounding soil.
References in periodicals archive ?
Tenders are invited for Constructing 5~ concrete sidewalks, 5~ asphalt pathways and a pedestrian hybrid beacon with associated paving, curb, gutter, pedestrian curb ramps, seepage bed and sand windows.