SC Public Works RC1631 Howard Creek Bridge #496 Replacement
Publication Date: February 21, 2016
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2. Call the Senior Planner assigned to the project; OR
3. Review the project file at Snohomish County Public Works (PW),3000 Rockefeller Avenue, Robert
J.DrewelBuilding, 2nd Floor,CustomerServiceCenter,Everett,Washington; Office Hours: M-F 8-5
except legal holidays. Please call the Senior Planner in advance to be certain the project file is available.
To comment on a project:
1. A public comment period for this DNS and LDA Permit was provided on October 19, 2014 with an end
date of November 10, 2014. This public notice is being revised for the sole purpose of correcting the
appeal language in the public notice dated October 19, 2014.
To appeal a SEPA decision:
There is no opportunity for appeal at this time. Pursuant to SCC 30.61.300(10), SEPA appeals related
to a shoreline substantial development permit shall be submitted to the state shorelines hearings board
together with appeal of the underlying shoreline permit.
How to reach us:
The Snohomish County Public Works Customer Service Center is located on the 2nd Floor of the Robert
J.DrewelBuildingat3000 Rockefeller Ave.,Everett,Washington.
3000 Rockefeller Avenue, M/S 607
Phone: 425-388-3700 TTY: 711
REVISED NOTICE OF LAND DISTURBING ACTIVITY
AND SEPA THRESHOLD DETERMINATION
(Pursuant to the provisions of Chapters 30.70.050(2) and 30.61 SCC)
Project Name:HowardCreekBridge#496 Replacement
Project Number: RC1631
Project Description:SnohomishCountyPublic Works proposes to replaceHowardCreekBridge#496
located onIndex-Galena Roadat Milepost 9.014. The bridge crossing provides vehicular access to the
Skyko 3 & 4 rural residential communities located north of the project in the upper North Fork Skykomish
River valley, and to land areas within the Mt. Baker-Snoqualmie National Forest. The project would replace
the existing 61-foot structurally deficient log stringer bridge that was constructed in 1976 with a longer 80foot
single span steel girder structure. The replacement bridge would span the stream with no intermediate
in-stream piers. The bridge width would increase from 26.5 feet to 28 feet, including two 11-foot wide travel
lanes with 3-foot wide shoulders.
The proposed work would occur in an existing roadway easement onIndex-Galena Roadlocated onU.S.
Forest Service land in the Mt. Baker-Snoqualmie National Forest. With no detour bridge proposed due to
site constraints, the bridge would be closed to traffic during construction.
The bridge has been determined to be structurally deficient, with a current sufficiency rating of 14.04 out of
100. The bridge is currently load limited to 5 tons, and has been restricted to single-lane access in an effort
to prolong structure functionality until replacement. The structural deficiency of the timber structure is due
to the deteriorating log stringer girders.
The bridge approach roadway work on both sides of the stream would extend for approximately 400
feet. The project would permanently impact an estimated 1,762 square feet (0.04 acres) to construct the
modified approach roadway and replacement bridge. The existing roadway would be used as a staging
area to accommodate construction machinery access. Large riprap rock would be removed from the stream
banks in proximity to the existing bridge abutments. The replacement bridge abutments would be located
further landward for the replacement span. A deep pile foundation would be designed to address the
potential for future scour erosion.
SCPW proposes mitigation and conservation measures to address impacts associated with the bridge
replacement construction. The mitigation includes restoring disturbed areas on site, restoring the land area
where the existing bridge and approach roadway is located, and increasing the hydraulic opening under
the bridge to promote more natural, unconstricted flows. The larger hydraulic opening would be created by
the installation of a longer bridge with a bridge foundation located landward of the ordinary high water mark
on both sides of the stream and by removing existing large riprap that has been placed near the existing
The proposed project including proposed mitigation measures also requires U.S. Forest Service approval.
The U.S. Forest Service proposes to grant the County an easement for the bridge replacement project
and issue a Special Use Permit for mitigation activities associated with the project. The easement and
special use permit would be issued by the Mt. Baker-Snoqualmie National Forest after review to determine
consistency with its adoptedForestplan.
Project Location: The project site is located onIndex-Galena Roadat Milepost 9.014 east of Index, in
unincorporatedSnohomishCounty. The project area is located in Section 30 Township 28 North, Range
11 East, W.M. of Snohomish.
Type of Project: Public Works Project – Bridge Replacement
Completeness Date: September 30, 2014
Permits/Approvals Required: Land disturbing activity permit; other applicable federal, state and local
SEPA Decision: October 5, 2014
Project Comment Period: A public comment period for this DNS and LDA Permit was provided on October
19, 2014 with an end date of November 10, 2014. This public notice is being revised for the sole purpose of
correcting the appeal language in the public notice dated October 19, 2014.
SEPA Appeal Period: There is no opportunity for appeal at this time. Pursuant to SCC 30.61.300(10), SEPA
appeals related to a shoreline substantial development permit shall be submitted to the state shorelines
hearings board together with appeal of the underlying shoreline permit.
Senior Planner: Crilly Ritz 425-388-3488, ext. 4586
Senior Planner e-mail: email@example.com
See PDF at: http://188.8.131.52/classified/legals/pdf/2016/1539563.pdf
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