Subsoil Drainage - Detailed Design

Document No:  D09#90695
Revision:  4
Date amended:  28-Jul-2015

The information below is intended to reflect the preferred practice of Main Roads Western Australia ("Main Roads"). Main Roads reserves the right to update this information at any time without notice. If you have any questions or comments please contact Zahirul Baten by e-mail or on (08) 9323 4160.

To the extent permitted by law, Main Roads, its employees, agents, authors and contributors are not liable for any loss resulting from any action taken or reliance made by you on the information herein displayed.


Revision Register

Ed/Version Number Clause Number Description of Revision Date
1 All Guideline Developed 13-May-2002 
1A 1.6 Main Roads Technical Specifications updated. 10-Oct-2006 
1B 1.6 Relinked to Updated Specification 403. 11-Sep-2007
2 All Guideline Revised and Approved. 08-May-2009
3 Header Contact updated. 11-Nov-2011
3A Header Telephone number of contact person updated. 25-Apr-2012
​3B​Header​Contact updated.13-May-2015
​4​All​Document Deleted.​28-Jul-2015


Document deleted. Refer to Main Roads Supplement to Austroads Part 5A and Austroads Guide to Road Design (GRD) Part 5A.