Subsurface Drainage Manual for Pavements in Minnesota

A guide for evaluation of highway subsurface drainage needs and design of subsurface drainage systems for \nhighways has been developed for application to Minnesota highways. The guide provides background information \non the benefits of subsurface drainage, methods for evaluating the need for subsurface drainage at a given location, \nselection of the type of drainage system to use, design of the drainage system, guidelines on how to \nconstruct/install the subsurface drainage systems for roads, and guidance on the value of maintenance and how to \nmaintain such drainage systems.