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SEPA determination of nonsignificance · example

Lower Swamp Creek Bridge Replacement

Replaces a load-restricted 47-foot bridge on NE 175th Street over Swamp Creek with a 74-foot single-span bridge on the same alignment, and restores the stream channel with woody material and boulders and removes 15 creosote piles.1

Facts from City of Kenmore public records, each linked by number to its source; checked November 13, 2026. Section notes by ePlan.

At a glance

Where
NE 175th Street over Swamp Creek, Kenmore, King County, Washington, mostly in city right-of-way with some work on King County and city parks land.2
Size
New bridge 74 feet long and 31 feet wide, replacing a 47-foot by 24-foot bridge; temporary bypass about 60 feet long and 16 feet wide.1
Lead agency
City of Kenmore; decision by the Responsible SEPA Official, Community Development Director3
Review
SEPA determination of nonsignificance, issued as a DNS using the optional DNS process3
Legal citation
WAC 197-11-340 (DNS), with WAC 197-11-355 optional process and WAC 197-11-970 form3
Status
DNS issued November 4, 2026; no further comment period; appeals due November 18, 20263

Timeline

  1. Checklist prepared2
  2. DNS issued3
  3. Last day to appeal3

Documents City of Kenmore published

What the documents say

SEPA DNS SEPA26-0066

Description of Proposal
Describes replacing the 47-foot bridge on NE 175th Street with a 74-foot bridge, a temporary bypass bridge for about six months, and stream restoration.3
Property Owners and Location
Lists the City of Kenmore, private owners and King County Parks as owners, and five subject parcels including 415670-0020 and 122604-9014.3
Determination
The City finds no probable significant adverse impact, requires no added SEPA mitigation, and needs no EIS, with a 14-day wait before acting.3
Appeals
Procedural appeals go to the Kenmore Hearing Examiner with a $125 fee, filed in person at City Hall by November 18, 2026.3

SEPA Checklist SEPA26-0066

A. Background
Gives the applicant as the City of Kenmore, work lasting up to ten months from spring 2028 through winter 2029, and no planned future expansion.2
Related environmental information
Lists studies prepared by Jacobs including a wetland and aquatic delineation, geotechnical, hydraulic and stormwater reports, a biological assessment and a cultural resources inventory.2
Government approvals or permits
Needed permits include a Clean Water Act 404/401 application, WDFW Hydraulic Project Approval, a Shoreline exemption and a King County Special Use Permit.2
Description of proposal
Details the single-span precast girder bridge with deep shaft foundations, temporary stream diversion, and removal of 15 creosote piles.2
Location of the proposal
Places the project in Section 12, Township 26 North, Range 4 East, over Swamp Creek in WRIA 8 Cedar-Sammamish.2

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Sources

  1. Washington SEPA Register, record 202604692apps.ecology.wa.gov
  2. SEPA Checklist SEPA26-0066apps.ecology.wa.gov
  3. SEPA DNS SEPA26-0066apps.ecology.wa.gov