Design Standards / EDDS

Rule Making Action 


Pursuant to Snohomish County Code (SCC) 30.82.040 (Rulemaking) on April 18, 2018 the Department of Public Works (DPW) proposed amendments to the Snohomish County Engineering Design and Development Standards (EDDS) and a Revision Rule 4220.070. Effective August 6, 2018, the Snohomish County DPW is adopting the amendments to the Snohomish County EDDS and Rule 4220.070.

Review Process: Pursuant to Snohomish County Code (SCC) 30.82.040 (Rulemaking) on April 18, 2018 the Department of Public Works (DPW) proposed amendments to the Snohomish County Engineering Design and Development Standards (EDDS) and a Revision Rule 4220.070. Effective August 6, 2018 the Snohomish County DPW is adopting the amendments to the Snohomish County EDDS and Rule 4220.070.
Request for County Council Review: Pursuant to SCC 30.82.065, within 120 days of rule adoption (by December 5, 2018) an interested person may request a review of the adopted rules by the County Council. A request for Council review should be sent to the contact person listed below or to the County Council at [email protected] or mailed to Snohomish County Council, 3000 Rockefeller MS 609, Everett WA 98201. Council review shall only determine whether the adopted rule is consistent with the scope of the department’s rule making authority as specified in SCC 30.82.010(1). No other formal appeal opportunity is available.

Current Edition (effective August 6, 2018)

  • Complete Text
  • Standard Details/Drawings (included with the text at the end of each chapter)
Previous EDDS Editions
Helpful Forms & Information
The following links are provided to useful forms and information:

Interim EDDS Administrative Interpretations


Pursuant to EDDS Section 1-04, the county engineer has the authority to approve Administrative Interpretations of the EDDS.

There are no Administrative Interpretations pending incorporation into the EDDS at this time.
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