Construction Manual
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 41-01.39
M 41-01.38
M 41-01.37
M 41-01.36
M 41-01.35
M 41-01.34
M 41-01.33
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M 41-01.24
14 fish passage projects were completed in 2020
improving access to 54.2 miles of upstream habitat.
11,959 incidents responded to
by WSDOT’s incident Response teams during second quarter of 2021, 15% more than same quarter in 2020.
41 Pre-existing Funds Projects Advertised
during the eighth quarter of the 2019-2021 biennium.