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Underground Outlets

Underground outlets apply where 1) excess surface water needs to be disposed of; 2) a buried outlet is needed for diversions, terraces or similar practices; 3) surface outlets are impracticable due to stability problems, climatic conditions, land use or equipment traffic.

The underground outlet practice considers capacity, inlets, hydraulics, materials, type of pipe, anti-seep collars and outlets.

NRCS FOTG Code 620