Technical Note: Subsoil Drains

Andrew Shirley

Abstract

This technical note has been prepared to assist in the understanding of subsoil drainage design and the related geotechnical issues. Subsoil drains are also sometimes referred to as ‘seepage drains’, ‘subsurface drains’, ‘trench drains’, ‘rubble drains’, ‘Ag drains’ or ‘agricultural drains’.