BT Part 1.2 - Site Drainage. Slope. Pavements

Sub-Surface Drainage

Consists of an underground network of piping for conveying groundwater to a point of disposal, as a storm sewer system or a natural outfall at a lower elevation on the site.

Catch Basins

Receptacles for the runoff of surface water. They have a basin or sump that retains heavy sediment before it can pass into an underground drainpipe

Culverts

They are drains or channels passing under a road or walkway.

Foundation drainage tile or pipe Tile or piping

For the collection of sub-surface water, dispersion of septic tank effluent, and the like.