A ditch enclosure involves installing a pipe where there was originally an open ditch primarily for irrigation in the western United States. It improves
the safety and aesthetic value of the area, and increases the hydraulic performance from that provided by the ditch. But the primary reason for
enclosures of irrigation channels is to mitigate water loss due to evaporation and infiltration.
Benefits of HDPE corrugated pipe in ditch enclosures
- Convenient installation - HDPE corrugated pipe is lightweight and easy to handle. It installs quickly and economically, sometimes without heavy equipment. Quality joints result from bell-and-spigot or coupling bands; glue is not used for HDPE pipe joints. For irrigation ditch enclosures watertight joints should always be specified.
- Structurally sound - Pipe used in a ditch enclosure is usually shallow and can experience traffic loadings if installed at road crossings. They are often backfilled as if they will be driven over in order to support the vehicle loading. Properly installed HDPE corrugated pipe can withstand AASHTO HS-25 loads with at least 1 ft (0.3m) of cover for pipe 48-in (1200 mm) and smaller, or 2 ft (0.6 m) of cover for larger pipe diameters. For irrigation ditch enclosures only HDPE corrugated pipe specifically designed for this application should be used.