HomeMy WebLinkAboutPre-app_ Mtg _Summary_ 230406_v1.pdf1
PRE-APPLICATION MEETING FOR
Boeing South Bridge Seismic Retrofit
PRE23-000079
CITY OF RENTON
Department of Community & Economic Development
Planning Division
April 6, 2023
Contact Information:
Planner: Alex Morganroth, 425-430-7219, amorganroth@rentonwa.gov
Public Works Plan Reviewer: Mike Sippo, 425-430-7298, msippo@rentonwa.gov
Fire Prevention Reviewer: Corey Thomas, 425-276-9582, cthomas@rentonrfa.org
Building Official: Rob Shuey, 425-430-7290, rshuey@rentonwa.gov
Please retain this packet throughout the course of your project as a reference. Consider
giving copies of it to any engineers, architects, and contractors who work on the
project. You will need to submit a copy of this packet when you apply for land use
and/or environmental permits.
Pre-screening: When you have the project application ready for submittal, call and
schedule an appointment with the project manager to have it pre-screened before
making all of the required copies.
The pre-application meeting is informal and non-binding. The comments provided on
the proposal are based on the codes and policies in effect at the time of review. The
applicant is cautioned that the development regulations are regularly amended and the
proposal will be formally reviewed under the regulations in effect at the time of project
submittal. The information contained in this summary is subject to modification and/or
concurrence by official decision-makers (e.g., Hearing Examiner, Planning Director,
Development Services Director, Department of Community & Economic Development
Administrator, Public Works Administrator and City Council).
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DEPARTMENT OF COMMUNITY
& ECONOMIC DEVELOPMENT
M E M O R A N D U M
DATE: April 5, 2023
TO: Michael Sippo, Development Engineering
FROM: Alex Morganroth, Planning
SUBJECT: Boeing South Bridge Seismic Retrofit – 737
Logan Ave N (Parcel number 072305-9001)
PRE23-000079
NOTE: The applicant is cautioned that information contained in this summary is preliminary and non-binding and
may be subject to modification and/or concurrence by official City decision-makers. Review comments may also
need to be revised based on site planning and other design changes required by City staff or made by the
applicant.
I have completed a preliminary review for the above-referenced proposal located at parcel(s) 072305-9001. The
following comments are based on the pre-application submittal made to the City of Renton by the applicant.
WATER
1. The proposed bridge retrofit straddles the Cedar River is located between the City Airport’s E Perimeter Rd
to the west, the City owned trail and park on the east side of Cedar River, and the Boeing property to the
east. There is an existing 12” D.I. City owned water main in E Perimeter Rd that dead ends adjacent to the
10” privately owned water main that crosses beneath the bridge and onto the Boeing property (see City
water plan W-061102).
2. Retrofit work to the bridge abutments and micropile driving will need to be mindful of the existing system
during construction to ensure that the existing mains are not damaged.
SEWER
1. There is an existing 8” City-owned sewer main that crosses beneath the east bridge approach on the Boeing
property east of the Cedar River Trail (see City sewer plan WWP-2700086).
2. Retrofit work to the bridge abutments and micropile driving will need to be mindful of the existing system
during construction to ensure that the existing mains are not damaged.
SURFACE WATER
1. The City is currently in the process of preparing for a levee project that may be constructed in the same
time-frame as this retrofit project. The City Stormwater department has been in contact with Boeing
regarding the City’s recertification project and does not have any concerns that the work proposed will
interfere or conflict with the levee prism and will not change/affect the inspection of the levee.
2. Temporary Erosion and sediment control will need to be implemented for this project to ensure that the
construction does not contribute to erosion or pollutants in the nearby drainage systems and within the
Cedar River itself.
TRANSPORTATION
Construction staging and work will need to be coordinated with the airport prior to and during construction to
ensure that airport operations are not hindered or interrupted.
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DEPARTMENT OF COMMUNITY
& ECONOMIC DEVELOPMENT
M E M O R A N D U M
DATE: April 6, 2023
TO: Pre-Application File No. 23-000079
FROM: Alex Morganroth, Senior Planner
SUBJECT: Boeing South Bridge Retrofit
737 Logan Ave N (Boeing Plant) and 600 W
Perimeter Rd (Renton Municipal Airport) -
APN 0723059007, 0723059001, and Cedar
River Reach A - 072305HYDR
General: We have completed a preliminary review of the pre-application for the above-referenced development
proposal. The following comments on development and permitting issues are based on the pre-application
submittals made to the City of Renton by the applicant and the codes in effect on the date of review. The applicant
is cautioned that information contained in this summary may be subject to modification and/or concurrence by
official decision-makers (e.g., Hearing Examiner, Community & Economic Development Administrator, Public Works
Administrator, Planning Director, and City Council). Review comments may also need to be revised based on site
planning and other design changes required by City staff or made by the applicant. The applicant is encouraged to
review all applicable sections of the Renton Municipal Code. The Development Regulations are available online at
www.rentonwa.gov.
Project Proposal: The applicant, the Boeing Company, is proposing seismically retrofit the existing bridge (aka south
bridge), one of two bridges across the Cedar River which serve as connections between the Boeing plant site to the
Renton Municipal Airport for 737 aircraft. The south bridge is located approximately two thirds of a mile upstream
from rivers outflow into Lake Washington. The Boeing plant site is located in the UC-2 zoning designation and
Commercial Mixed Use Comprehensive Plan Land Use Designation. The Renton Municipal Airport is located in the
Industrial, Medium zoning district and Employment Area Comprehensive Plan Land Use Designation. According to
the applicant the south bridge is a 170-foot long, three-span, steel girder bridge. The bridge width is 50 feet from
face-to-face of curb, and the span configuration consists of a 120-foot long main span with two 25-foot long
approach pans. The bridge is founded on timber piles with cast-in-place concrete pile cap footings at both the
abutments and intermediate piers. To seismically retrofit the bridge, the applicant would perform work including
but not limited to, installation of micropiles at each corner of the bridge, installation of pile caps to abutment
connections in order to accommodate vertical settlement during a seismic event, and the provision of bolstering to
the abutments using cast-in-place reinforced concrete. The intent of the work is to improve the likelihood of the
bridge’s continued functionality after a seismic event. According to the applicant, the project would not result in
impacts to existing parking, trees, or public rights-of-way. Riparian vegetation may be impacted by installation of
the proposed pile caps, but no aquatic vegetation would be impacted as no in-water work is proposed. A high
seismic hazard area, Special Flood Hazard Area, and Wellhead Protection Area Zone 2 are mapped on the site
according to COR Maps. In addition, the proposed improvements are located within Reach A of the Cedar River with
an Environmental Designation of Shoreline High Intensity. The Cedar River is a Shoreline of the State.
Current Use: The existing south bridge is utilized by Boeing as a means of transporting aircraft from the
manufacturing facility to the Renton Municipal Airport.
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Zoning: The Boeing plant site is located in the UC-2 zoning designation and Commercial Mixed Use Comprehensive
Plan Land Use Designation. The Renton Municipal Airport is located in the Industrial, Medium zoning district and
Employment Area Comprehensive Plan Land Use Designation. The existing use on the Boeing Plant site (zoned UC-
2) is subject to a development agreement approved by the Renton City Council in 2003 (Development Agreement
for Renton Plant Redevelopment). Airplane manufacturing accessory functions are permitted as accessory uses on
the Renton Municipal Airport site (zoned IM).
Development Standards: The project would be subject to RMC 4-2-130A, “Development Standards for Industrial
Zoning Designations” effective at the time of the 2003 development agreement. In addition, the project would be
subject to RMC 4-2-120A, “Development Standards for Commercial Zoning Designations” currently in effect. Due to
the nature of the subject project, certain standards as density, setbacks, and lot size are not applicable. As such,
the following report addresses only those development standards that appear to be applicable at this time.
Critical Areas: The subject project is located adjacent to and over the Cedar River, a Shoreline of the State. As
such, the project is required to comply with the City of Renton’s Shoreline Master Program (SMP). The associated
improvements would be located in Reach A of the Cedar River with a Shoreline High Intensity designation. The
subject project may result in impacts to the Cedar River or the shoreline, as such a stream study and a mitigation
plan identifying “no net loss” would be required with the project application.
COR maps indicates the site is located in a high seismic hazard area with the potential for sensitive or steep sloeps.
The seismic hazard is related to potential liquefaction of soils during an earthquake event. A geotechnical analysis
for the site is required. The analysis needs to assess soil conditions, stability, and detail construction measures to
assure stability.
The site is located within the Wellhead Protection Area Zone 2. A fill source statement will be required for any
offsite soils brought to the site.
According to City of Renton (COR) Maps the subject site is mapped with High Seismic Hazard Areas, and Special
Flood Hazard Area (100 year flood) FEMA Zone –AE. Development proposals and other alterations shall not reduce
the effective base flood storage volume of the floodplain. If grading or other activity will reduce the effective storage
volume, compensatory storage shall be created on the site or off the site if legal arrangements can be made to
assure that the effective compensatory storage volume will be preserved over time. Future improvements would
be required to comply with Flood Hazard Area standards related to flood proofing, compensatory storage, and
construction techniques capable of resisting hydrostatic and hydrodynamic loads. In addition, work may be
proposed in the identified floodway (separate from Special Flood Hazard Area). If work is proposed in the floodway
or floodplain, a Floodplain Biological Assessment shall be provided with the land use application.
All new construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral
movement of the structure resulting from hydrodynamic and hydrostatic loads including the effects of buoyancy.
It is the applicant’s responsibility to ascertain if any other critical areas or environmental concerns are present on
the site during site development or building construction.
Shoreline Regulations (RMC 4-3-090): The objective of the High Intensity Overlay is to provide opportunities for
large-scale office and commercial employment centers as well as multi-family residential use and public services.
This district provides opportunities for water-dependent and water-oriented uses while protecting existing
ecological functions and restoring ecological functions in areas that have been previously degraded. Development
may also provide for public use and/or community use, especially access to and along the water's edge.
Roads are a permitted use in the Shoreline High Intensity overlay, the following standards apply to new roads within
the Shoreline Jurisdiction:
General Standards: New and expanded transportation facilities shall be designed to achieve no net loss of ecological
functions within the shoreline. To the maximum extent feasible the following standards shall be applied to all
transportation projects and facilities:
i. Facilities shall be located outside of the shoreline jurisdiction and as far from the land/water interface as
possible. Expansion of existing transportation facilities shall include analysis of system options that assess
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the potential for alternative routes outside shoreline jurisdiction or set back further from the land/water
interface.
ii. Facilities shall be located and designed to avoid significant natural, historical, archaeological, or cultural
sites, and mitigate unavoidable impacts.
iii. Facilities shall be designed and maintained to prevent soil erosion, to permit natural movement of
groundwater, and not adversely affect water quality or aquatic plants and animals over the life of the
facility.
iv. All debris and other waste materials from construction shall be disposed of in such a way as to prevent
their entry by erosion into any water body and shall be specified in submittal materials.
v. Facilities shall avoid the need for shoreline protection.
vi. Facilities shall allow passage of flood waters, fish passage, and wildlife movement by using bridges with
the longest span feasible or when bridges are not feasible, culverts and other features that provide for these
functions.
vii. Facilities shall be designed to accommodate as many compatible uses as feasible, including, but not
limited to: utilities, viewpoint, public access, or trails.
Roads:
i. New public or private roads and driveways shall be located inland from the land/water interface,
preferably out of the shoreline, unless:
(a) Perpendicular water crossings are required for access to authorized uses consistent with the
Shoreline Master Program; or
(b) Facilities are primarily oriented to pedestrian and nonmotorized use and provide an opportunity for
a substantial number of people to enjoy shoreline areas, and are consistent with policies and
regulations for ecological protection.
ii. Road locations shall be planned to fit the topography, where possible, in order that minimum alteration
of existing natural conditions will be necessary.
iii. RCW 36.87.130 prohibits vacation of any right-of-way that abuts freshwater except for port, recreational,
educational or industrial purposes. Therefore, development, abandonment, or alteration of undeveloped
road ends within Shoreline Master Program jurisdiction is prohibited unless an alternate use is approved in
accordance with the Shoreline Master Program.
Environmental Review: The proposal appears to fall under the City’s adopted categorical exemption thresholds
(RMC 4-9-070G) and is therefore is exempt from State Environmental Policy Act (SEPA) Review in accordance with
WAC 197-11-800(3), repair, remodeling, and maintenance activites.
Permit Requirements: The proposal would be required to a Shoreline Exemption The application would be reviewed
concurrently in an estimated time frame of eight (8) weeks following acceptance of a complete application. There
is no fee for a Shoreline Exemption application.
Detailed information regarding the land use application submittal can be found on the City’s permitting webpage
and other informational applications and handouts can be found on the City’s Digital Records Library. The City
requires electronic plan submittal for all applications. Please refer to the City’s Electronic File Standards.
In addition to the required land use permits, separate construction and building permits may be required.
Public Information Sign: Public Information Signs are required for all Type II and Type III Land Use Permits as
classified by RMC 4-8-080. Public Information Signs are intended to inform the public of potential land development,
specific permits/actions being considered by the City, and to facilitate timely and effective public participation in
the review process. The applicant must follow the specifications provided in the public information sign handout.
The applicant is solely responsible for the construction, installation, maintenance, removal, and any costs associated
with the sign.
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Next Steps: When the formal application materials are complete, the applicant shall have the materials pre-
screened virtually prior to submitting the complete application package. Please contact Alex Morganroth, Senior
Planner at 425-430-7219 or amorganroth@rentonwa.gov to schedule a virtual prescreen appointment.
Expiration: Shoreline exemptions do not expire.
Building Official Comments