Maintenance Manual

Publication Number
M 51-01
Publication Version
M 51-01.12
Publication Date
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

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

We are hiring!

We have a range of positions open across the state - view all current job openings.

Improved access to 98.2 miles of upstream fish habitat

through 15 fish passage projects in 2021.

28% increase in the value of exports and imports 

from $90.2 billion in 2020 to $115.5 billion in 2021.