 
	Laboratory Report LR 346 Selection of materials for sub surface drains
Publication Year
1970
Document Status
Current
Abstract
Discusses the part played by the various components of a sub surface drain in achieving adequate permeability and in preventing clogging of the drain by silt. Presents criteria for the grading limits of the backfill and reviews the porosity of the pipes in a drain. Finally, conclusions are presented.
Author
Spalding, R.
Publisher Information
Transport Research Laboratory
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