North Seattle Lateral Upgrade

Page last updated: March 28, 2019

Project Description 

Northwest Pipeline LLC, a Williams company, is proposing to remove and replace up to 5.85 miles of the existing 8-inch diameter North Seattle mainline lateral and replace it with 20-inch diameter pipe. Subsequent phases of the North Seattle Later Upgrade Project (Project) include: upgrading the existing North Seattle/Everett delivery meter station for the higher capacity line; installing a new mainline valve; and installing a new pig launch/receiver site at the terminus of the 20-inch pipeline.  The project will provide an additional 159,299 dekatherms per day of delivery capacity on the existing North Seattle Delivery Lateral system as request by Puget Sound Energy (PSE).

Project Chronology

01/25/18    Original permit applications submitted to PDS

04/27/18    1st review letter sent to applicant

10/24/18    DNS threshold determination issued

11/14/18    DNS withdrawn

11/30/18    2nd review letter to applicant

01/23/19    Received response from applicant re: 2nd review letter

03/06/19    MDNS issued

03/06/19    Adoption of FERC NEPA documents

03/13/19    New Shoreline and Flood Hazard permit applications for meter station at east end of project on Elliot Rd.

03/13/19    Notice of Applications published on new permits 

03/20/19    MDNS comment/appeal period expires

03/20/19    Comment/Appeal period expired on original LDA, FHZ, and CBP permits - no appeals submitted

04/17/19    Comment Period expires on the new meter station Shoreline and Flood Hazard permit applications 

04/18/19    Meter station flood hazard permit issued (new)

04/18/19    Meter station Shoreline permit approved by PDS and sent to the Department of Ecology (DOE). (new)

05/13/19    DOE deadline for appeals of the meter station Shoreline permit. (new)

Key Project Documents 

County Permit Applications (01/25/19)
Land Disturbing Activity18 121944 LDA
Forest Practices Activity18 121972 FPA
Flood Hazard18 121979 FHZ
Retaining Wall18 121974 CBP
Shoreline 19 103601 SHOR
Flood Hazard19 103602 FHZ
Shoreline Permit Decision19 103601 SHOR

Vicinity map

Pipeline Alignment plan set original (01/25/18)

State Environmental Policy Act (SEPA) Checklist (01/25/18)

1st PDS Review letter (04/27/18)

2nd PDS Review letter (11/30/18)

Combined Notice of Determination of Non-Significance (DNS) and Decision (10/24/18)

DNS  (10/24/18)

Notice withdrawing DNS (11/14/18)

Applicant response to 2nd PDS review letter addressing Greenhouse Gas Emissions & Safety (1/23/19)

Current Pipeline Alignment plan set (02/23/19)

Combined Notice of Mitigated Determination of Non-Significance (MDNS) and Type 1 Decisions (03/06/19)

MDNS (03/06/19)

Notice of adoption of Existing Environmental Documents (03/06/19)

Notice of Application (new) (03/13/19)

Vicinity Map (new) (03/13/19)

Meter Station Site Plan (new) (03/13/19)

Map Area Detail

Environmental Review and Threshold Determination

PDS staff reviewed the applicant's State Environmental Policy Act (SEPA) Environmental Checklist, as well as documents and plans submitted with the application. Based on this information, PDS issued and published a combined Notice of Mitigated Determination of Non-significance (MDNS), SEPA Threshold Determination, and Notice of Decision to approve the applicant’s permits on March 6, 2019





Appeal opportunities 

Appeal of the Shoreline permit can only be made at the time of the Notice of Decision to issue the permit as follows: Pursuant to Section 30.44.250 SCC and RCW 90.58.180, any person aggrieved by the granting or denying of a substantial development permit by the County may seek review by filing a request for review with the Shorelines Hearings board within twenty-one days of the date of filing as defined in RCW 90.58.140(6) and WAC 173-27-130. All requests for review of final permit decisions are governed by the procedures established in RCW 90.58.180, WAC 173-27-220, and WAC 461-08. Please use the county file number on all correspondence with the county regarding this case.

NEW: Appeal of the Shoreline Substantial Development Permit must be submitted to the Washington State Department of Ecology by May 13, 2019. You can find appeal instructions (Chapter 461-08 WAC) at the Washington State Environmental and Land Use Hearings Office website. 

How to Get Involved

To submit comments or become a Party of Record for this project, you can send a letter or email to the Permit Project Manager, Randy Middaugh, at the address below.  Be sure to include the file number, and your name and address in your correspondence.  Read more about what it means to be a Party of Record.

PDS Project Contact

Randy Middaugh | Principal Planner

Snohomish County Planning and Development Services

3000 Rockefeller Ave M/S 604, Everett, Wa. 98201

425-262-2306 | Email Randy