Standard Specifications & Details 2018

Additions / Modifications After Publication

Date Added/Modified
323 Added 6/1/2018
DG 14 Modified 6/1/2018
DG 15
DG 16 Modified
DG 18
Added 6/13/2018
DG 19
Added 6/13/2018
DG 20 Added 6/13/2018
426A Modified 6/13/2018

ATTENTION: New Updates March 1, 2018

The Standard Specifications and Details have been updated by the Public Works Department. This document supplements and in some cases supersedes the 2018 WSDOT / APWA Standard Specifications for Road, Bridge, and Municipal Construction. The updates are effective March 1, 2018.

If you would like to receive notification of future updates to this document, please send an email request to with your preferred email address and contact name.

The document is available:

The 2018 Table of Contents highlights the updates to the 2018 Standard Details. Each Standard Detail is coded as follows:

White-no change

(Please Note: Many details were updated with a signature only; these details are not highlighted as revised.)

Table of Contents / Deleted Details 2018

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Standard Specs