Construction Manual

Publication Number
M 41-01
Publication Version
M 41-01.40
Publication Date
Manual Manager
Heidi Jensen; 360-705-7908
State Construction Office, Engineering and Regional Operations Division


This manual provides department construction engineering personnel instruction for fulfilling the objectives, procedures, and methods for construction administration of Washington State transportation projects. The Construction Manual is intended as a reference book.

The Construction Manual can be downloaded in pdf format and printed without charge.

Individual Chapters

Foreword (PDF 168KB)
Contents (PDF 220KB)

Chapter 1 Administration (PDF 1.3MB)
Chapter 2 Earthwork (PDF 3.7MB)
Chapter 3 Production From Quarry and Pit Sites and Stockpiling (PDF 3.1MB)
Chapter 4 Bases (PDF 365KB)
Chapter 5 Surface Treatments and Pavements (PDF 553KB)
Chapter 6 Structures (PDF 4.4MB)
Chapter 7 Drainage Structures, Sewers, and Conduits (PDF 3.2MB)
Chapter 8 Miscellaneous Construction (PDF 2.7KB)
Chapter 9 Materials (PDF 1.7KB)
Chapter 10 Documentation (PDF 1.2KB)
Chapter 11 Forms (PDF 345KB)

Revision History

M 41-01.40

M 41-01.39

M 41-01.38 

M 41-01.37 

M 41-01.36 

M 41-01.35 

M 41-01.34

M 41-01.33

M 41-01.32

M 41-01.31

M 41-01.30

M 41-01.29

M 41-01.28

M 41-01.27

M 41-01.26 

M 41-01.25

M 41-01.24 

Zero emission electric vehicle registrations in Washington

increased 192% between 2017 and 2021.

45 projects to improve freight rail structures and freight movement

were underway as of December 31, 2021.

Washington state leveraged $100,000 to secure $27 million

in funding for airport investments in Fiscal Year 2022.