Engineering Design & Development Standards (EDDS)
EDDS viewing options:
Many of the documents are in pdf format. To read these files you'll need to have Adobe Acrobat Reader installed on your computer.
Note: To save a CAD drawing to your computer, click on the link to open the drawing in your browser, then right click with your mouse and choose "save target as" and type in the .dwg extension after the file name if its not there already. Next choose the destination on your computer where you want to save the CAD file to. Then you can open the file with your AutoCAD application.
Notice of Rule Adoption: Bridge Design Standards
The County Engineer has adopted certain revisions to EDDS Chapter 6 (Bridges) for consistency with current industry standards. These revisions take effect on September 18, 2009.
Notice of Rule Adoption: Urban Residential Design Standards
After reviewing public comments, the County Engineer and DPW Director have revised and adopted certain urban road standards and text in the EDDS to implement the urban residential design standards ordinance. These final revisions (rules), provided below and on the "DPW Rules" webpage, take effect on April 21, 2009 for development applications deemed complete on or after that date.
County Council Review: Per SCC 30.82.065, these rules may be reviewed by the County Council upon written request by an interested person, if such request is submitted to the DPW Director within 120 days of the approval date (by October 6, 2009). Council review is limited to whether the adopted rules are consistent with the scope of DPW's rulemaking authority per SCC 30.82.010(1).
Notice of Rule Adoption: Rural Cluster Subdivision
After reviewing public comments, the County Engineer and DPW Director have revised and adopted certain rural road standards and text in the EDDS to implement the rural cluster subdivisions ordinance. These final revisions (rules), provided below and on the "DPW Rules" webpage, take effect on April 5, 2009 for development applications deemed complete on or after that date.
County Council Review: Per SCC 30.82.065, these rules may be reviewed by the County Council upon written request by an interested person, if such request is submitted to the DPW Director within 120 days of the approval date (by August 3, 2009). Council review is limited to whether the adopted rules are consistent with the scope of DPW's rulemaking authority per SCC 30.82.010(1).
The following links are provided to useful forms and information.
Appendix A: Comment/Change Request Form (pdf)
Deviation Request Form (pdf)
Deviation Request Form (for computer entry)
Appendix B: Detention Facility Landscaping (pdf)
Appendix C: Utility Pre-Design Conference Checklist (pdf)
(To be completed at meeting with PDS Traffic/Drainage Engineering staff)
Interim EDDS Administrative Interpretations: Pursuant to EDDS Section 1-04, the County Engineer has approved the following “Interim EDDS Administrative Interpretations.” Formerly known as “EDDS Blanket Deviations,” these interpretations are intended to clarify the meaning and use of certain EDDS provisions. The interpretations will be implemented by the PDS Traffic/Drainage Engineering staff; prior discussion with the staff is recommended. The interpretations are not considered EDDS deviation requests and will not be charged the deviation review fee applicable on July 1, 2008. They are considered “interim” until they have been incorporated in the next EDDS revision.
To purchase an EDDS CD ($10 plus postage) or paper copy ($25 plus postage), please contact Snohomish County Public Works, Customer Service Counter,
(425) 388-6453.
Please address any questions to: Bob McEwen, (425) 388-3488, ext. 4578