Maintenance Manual

Publication Number
M 51-01
Publication Version
M 51-01.13
Manual Manager
Kelly Shields
Maintenance and Operations Programs
Maintenance of highways.

The Maintenance Manual provides maintenance personnel with procedures and guidelines for maintaining the highway system in Washington State. It focuses on equipment, materials, facilities, techniques, and other information to carry out maintenance activities of the department. This manual does not establish absolute standards but provides uniform operating procedures and performance guidelines.

Individual Chapters

Foreword (PDF 173KB)

Contents (PDF 250KB)

Chapter 1 Emergency Procedures (PDF 107KB)

Chapter 2 Work Zone Traffic Control and Safety (PDF 334KB)

Chapter 3 Pavement Patching & Repair (PDF 452KB)

Chapter 4 Drainage (PDF 181KB)

Chapter 5 Maintenance of Structures (PDF 268KB)

Chapter 6 Roadside Management (PDF 1.6MB)

Chapter 7 Snow and Ice Control (PDF 276KB)

Chapter 8 Traffic Services (PDF 285KB)

Chapter 9 Electrical System Maintenance (PDF 172KB)

Chapter 10 Miscellaneous (PDF 252KB)

Chapter 11 Maintenance and Design Coordination (PDF 252KB)


Appendix A (PDF 2.3MB)
Appendix B (PDF 293KB)

Revision History

May 2023

March 2021

September 2020

March 2020

March 2020

April 2019

June 2017

April 2017

August 2013

October 2010

February 2008

July 2007

January 2007

February 2005

September 2004

March 2002

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.