Engineering Details & Specifications

The Engineering Details & Specifications document is published by the Engineering Division of the City’s Public Works Department. This document specifies the minimum criteria for construction, maintenance and alterations outside of building structures on both public and privately controlled property and is intended to assist but not substitute competent work by design professionals and contractors.

The Engineering Division periodically updates the details and specifications provided on this page. The most recent major document update was March 2022 with the previous versions also available. The document is freely available in PDF format viewable to various PDF viewer software programs, through the link below. Please submit any comments or corrections to the City Engineer at jbirchman@mltwa.gov (Jesse Birchman; 425-744-6275).

2022 Engineering Details & Specifications (current)