HomeMy WebLinkAboutContractCAG -05-030
Congestion Relief & Bus Rapid Transit Projects
600 — 108th Ave NE, Suite 405
Bellevue, WA 98004
Main 425-456-8500
Fax 425-456-8600
January 7, 2005
Gregg Zimmerman, Public Works Director
City of Renton
1055 South Grady Way
Renton, WA 98055
Dear Mr. Zimmerman:
Re: I-405 Mainline Alignment — Renton Western City Limit to SR 169
Concurrence Letter
This letter documents that the City of Renton and the Washington State Department of
Transportation (WSDOT) concur with the I-405 mainline alignment from the western Renton
city limit to SR 169.
How are I-405 Projects Defined, Funded and Phased?
As you know, the I-405 Corridor Environmental Impact Statement was approved by the FHWA
and FTA in October 2002 with a Record of Decision (ROD). The ROD identified the Selected
Alternative (the I-405 Master Plan) which provided transportation improvements throughout the
I-405 study area including a conceptual mainline alignment. The design detail provided in the
Selected Alternative is conceptual design, or approximately one percent design. In spring 2003,
the Washington State Legislature approved a Nickel Funding Package providing more than $4
billion over 10 years for a variety of highway improvements throughout the state. One of these
"Nickel Projects" is on I-405 and SR 167 in the City of Renton. The $136 million Renton Nickel
Project is the first step toward achieving the I-405 Master Plan. The NEPA Environmental
Assessment (EA) for the Renton Nickel Project will begin January 2005, and project
construction is scheduled to begin in 2007.
Part of the Renton Nickel Project funds work to advance the I-405 Master Plan "footprint"
through the City of Renton. Footprint design ensures that the Renton Nickel Project is consistent
with the Master Plan and that it does not unintentionally constrain the Master Plan Projects.
What is the I-405 Mainline Alignment?
A mainline alignment concept is provided in the I-405 ROD. To improve upon the alignment
concept, WSDOT and the City closely examined alignment options: widen to the left, widen to
the right, symmetrical, and combination. The combination alignment incorporates alignment
choices from the left, right and symmetrical options. The alignment screening matrix is attached.
The combination alignment was advanced for 5% design. The combination alignment was
further evaluated by two options: minimize business impacts and minimize residential
neighborhood impacts.
Gregg Zimmerman, Public'..�ks Director
City of Renton
Page 2
January 7, 2005
The resulting mainline alignment, combination minimizing business impacts, was put forth to the
City's Executive/Administrators Committee in May 2004 and again November 2004. The
Executive/Administrators Committee recommended the alignment on December 6, 2004. The
Renton City Council confirmed the mainline alignment on December 20, 2004.
The Benson Structure — Why is there a need for Footprint Certainty?
The project team needs to understand the location of the Benson over crossing structure, which is
an improvement common to both the Renton Nickel Project and the I-405 Master Plan. Funding
has been authorized to construct the Benson structure as part of the Renton Nickel Project;
funding to construct the Master Plan is uncertain.
Two future Master Plan components influence the location and design of the Benson structure:
the I-405 mainline alignment and the proposed reconstructed I-405 / SR 167 interchange. These
Master Plan components need to be understood at a footprint level to ensure that the Renton
Nickel Project does not unintentionally constrain these future projects. The I-405 / SR 167
interchange is covered in a separate concurrence letter dated January 7, 2005.
What are the I-405 Mainline Alignment Next Steps?
The Renton Nickel Project Environmental Assessment will kick off January 25, 2005 with an
agency scoping meeting. The public open house is scheduled for January 7, 2005. The Nickel
Project's 15% design has recently begun. WSDOT will work closely with City staff to refine the
mainline alignment as the engineering progresses from 5% to 15% design. The project team will
consider the I-405 mainline alignment as they progress the Benson structure design. The Benson
structure design and location will be evaluated in the Renton Nickel EA.
Gregg Zimmerman, Public mks Director
City of Renton
Page 3
January 7, 2005
Concurrence
I am anticipating a project that will set a high standard of cooperation between the City and
WSDOT. By signing below, the City and WSDOT concur with the I-405 mainline alignment
from the western Renton city limit to SR 169 as we move into the Renton Nickel Project EA.
Sincerely,
Oe
Craig J. o , PE
I-405 Project Director
City of Renton Concurrence:
lw��0
Kathy keolker - Wheeler Date
Mayor, City of Renton
cc: Administrators Executive Committee members
City Design Team members
City Traffic Analysis Task Force members
I-405 Project Files
Attachments
CJS: sct
Attest:
Bonnie I. Walton, City Clerk
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