b'STORMWATERCATALOGD R A I N A GE124 MANHOLES 127 HEADWALLSBelow ground round or square structure that To deflect water away from the soil and toallows piping connections and access to the help prevent erosion and to terminate a pipe.stormsewer system. 174 CANAL VALVES125 CATCH BASINS Provides control of water for drainage/flood A precast concrete box that is strategically control, irrigation, wastewater treatment,placed underground to prevent flooding of environmental management.pavement, landscaping and property. 194 FLUMES125 SAFETY END TREATMENTS A flume is a specially shaped engineeredPrecast concrete retaining wall that is used structure that is used to measure flowalong roadways to terminate piping installed in an open channel.under roadways or driveways. 196 STORMWATER WEIRS126 DRAINAGE PIPES Designed to restrict outlet flow rates based onConveying wastewater and stormwater the level of the fluid, or head pressure.through underground systems; they willnot rust, burn, tear, buckle or deflect.126 CURB INLETSPart of a stormwater management systemthat allows stormwater to flow directly frompaved surfaces to a storm sewer. 126 TRENCH DRAINSFor the rapid evacuation of surface water,containment of utility lines or chemical spills.'