SLOPE (BENCH) DRAINS
Drainage devices (including slope or bench drains), located throughout hillside areas, that are poorly maintained are the source of many flooding problems. With few exceptions, maintenance of these drains is the responsibility of the homeowner. KEEP THESE DRAINS CLEARof debris and overgrowth (see Glossary). Blockage may cause undermining and structural failure of the drains or erosion of the hillside (Fig. 22, below).