Inlet Types

Inlets used for the drainage of highway surfaces into four major classes:
  • Curb opening inlets - See
    Figure 10-2
    .
  • Grate inlets - See
    Figure 10‑4
    .
  • Linear drains - May be slotted drains (
    Figure 10-5
    ) or trench drains (
    Figure 10-6
    ).
  • Combination inlets -- Combination inlets usually consist of some combination of a curb-opening inlet and a grate inlet. In a curb and grate combination, the curb opening may extend upstream of the grate.