HomeMy WebLinkAboutCOW 2011-10-10 Item 4A - Report - Tukwila Urban Center Pedestrian / Bicycle BridgeCAS NUMBER:
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C.A lIiGOR1' Discussion
COUNCIL AGENDA SYNOPSIS
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Meeting Date Prepared by Mayor's review Council review
10/10/11 BG ocs 4.A.
10/17/11 BG
ITEM INFORMATION
STAFF SPONSOR: BOB GIBERSON
ORIGINAL AGENDA DATE: 10/10/11
Tukwila Urban Center Pedestrian/ Bicycle Bridge
Options for Bridge Design from Type, Size, and Location Report
Ad/s Dale 10/10/11
Motion Resolution Ordinance .Bid ..Alva7d Pudic .Hearinb 0// er
A4tg Date 10/17/11 All Date tVltg Date 111tg Dale A�Itg Date A2tg Date
SPONSOR Council Mayor HR DCD .Finance .Fire IT P &R Police ®.Plr/
(SPONSOR'S KPFF has completed the Tukwila Urban Center Pedestrian/ Bicycle Bridge Type, Size, and
Location Report. Five bridge styles and three trail alignments are available as well as
options for ADA requirements. Staff was directed to include public input with an on -line
survey and a presentation to the Chamber of Commerce. Council is being asked to give
staff direction on bridge type and future bridge expansion across the West Valley Hwy in
order to proceed with the final bridge design.
cow Mtg. CA &P Cmte F &S Cmte Transportation Cmte
Utilities Cmte Arts Comm. Parks Comm. Planning Comm.
DATE: 0 8/15/11&9/6/11 COMMITTEE CHAIR: JOAN HERNANDEZ
RECOMMENDATIONS:
SPONsoiz /Ai)N11N. Public Works
Coal n I °ITT. Forward to Committee of the Whole for discussion /direction.
COST IMPACT FUND SOURCE
E \P1,NDI'I'URL ;RI',C)UIRI?D AMOUNT BUDGETED APPROPRIATION REQUIRED
$0.00 $9,218,000.00 $0.00
Fund Source: 1 04 BRIDGE /ARTERIAL STREET FUND (PAGE 10, PROPOSED 2012 CIP)
Connnents:
MTG. DATE
10/10/11
10/17/11
MTG. DATE
10/10/11
10/17/11
RECORD OF COUNCIL ACTION
ATTACHMENTS
Informational Memorandum dated 10/4/11 (Revised after 9/6/11 TC)
Draft Type, Size, and Location Report Summary Recommendations
Minutes from the Transportation Committee meetings of 08/15/11
(please bring your binder with the TUC Ped Bridge Type, Size, and Location Report)
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City of Tukwila
Jim Haggerton, Mayor
INFORMATIONAL MEMORANDUM
TO: Mayor Haggerton
Transportation Committee
FROM t
Bob Giberson Public Works Director
DATE: October 4, 2011
SUBJECT: Tukwila Urban Center (TUC) Pedestrian Bicvcle Bridge
Project No. 90510403
Type, Size, and Location Report
ISSUE
Present the TUC Pedestrian /Bicycle Bridge Type, Size, and Location (TS &L) Report and discuss bridge
options.
BACKGROUND
On August 15, 2011 and September 6, 2011, staff presented the history of the TUC Pedestrian /Bicycle
Bridge project and highlighted key aspects of the TS &L Report to the Transportation Committee. On
September 30, 2011, the final draft of the TS &L Report was distributed to the entire Council for review.
DISCUSSION
Several bridge and trail alignments were studied along with several bridge types. Two ADA compliant
options; ramps and an elevator /stairs combination, were also studied. All bridge options can
accommodate any trail alignment as well as a future bridge crossing over W Valley Highway. Council
must decide if the TUC Pedestrian Bridge design should assume the expansion of a future W Valley Hwy
pedestrian bridge. A cost savings of approximately $500,000 can be realized by removing this option.
Cost estimates for the five bridge types are summarized below (details are on pages 78 -79 in the TS &L
Report). The estimates are in 2008 dollars and include a 50% contingency as the level of engineering is
not yet complete enough for a more accurate estimate. The summary and recommendation section from
the TS &L Report are attached.
Subtotal
50% Contingency
Total (2008
$6,012,896 $6,524,547
$3,006,448 $3,262,274
$9,019,344 1 $9,786,821
$6,546,337
$3,273,168
$9,819,505
$5,794,650
$2,897,325
$8,691,975
$5,276,930
$2,638,465
$7,915,395
Preliminary results of an on -line poll asking for public input on the bridge types will be presented during
the October 10 Council meeting.
RECOMMENDATION
Provide direction to staff on bridge type and future W Valley Highway bridge expansion in order to
proceed with final design on the TUC Pedestrian /Bicycle Bridge at the October 10, 2011 Committee of
the Whole and subsequent October 17, 2011 Regular meeting.
Attachment: Final Draft Section 14: Summary and Recommendations
WAPW Eng \PROJECTS\A- RW RS Projects \05 -RWO3 TUC Ped Bridge \Info Memo TSL Discussion 10 -4-1 t.docx
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14. Summary and Recommendations
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The proposed pedestrian bridge over the Green River and West Valley Highway is meant to act as a
catalyst between existing and future development. Promoting the use of public transportation and
alternative modes of transport, this vital link will help support densification of the area and a more
walkable lifestyle. It should be easily accessible, ADA compliant, and be aided by understandable and
welcoming wayfinding leading to and from surrounding development. The bridge, its approaches, and
adjacent open space should be safe and inviting at all times of day, providing appropriate lighting at
night and secure storage options for bicycles. In addition, the project should not negatively affect the
existing properties around the site and should in fact benefit and complement those areas so as to
hopefully increase their value.
Of the pathway alignments for the west side of the bridge, Alignment 1 is recommended as the best
option because it evokes the most visually strong link and provides the shortest and most direct route
available.
Bridge Alignment A is recommended for the river crossing because it provides the most direct
connection across the Green River, requires the shortest bridge structure, and can be adapted to
accommodate a future highway crossing. The twin tied arch is recommended for the bridge type
because it provides a functional structure with reasonable cost and fulfills the aesthetic requirements
of the project with its curved members and open design. However, if the City wants to create an iconic
structure and utilize either the inclined arch or single tied arch styles, the premium to the project cost
would be approximately $800,000 or 9 percent more than the twin tied arch project costs.
NEXT STEPS
Following the review and discussion of this report, as the project continues into the final design phase,
it is recommended that the next steps include:
Determine whether the crossing of West Valley Highway should be incorporated into the design
criteria. If so, determine alternatives for crossing the West Valley Highway.
Determine if the City feels that an iconic structure is worth the additional cost to the project.
Refine costs and attempt to define the items included in or reduce the amount of the 50
percent contingency.
Conduct detailed survey of preferred alignment.
City of Tukwila
Pedestrian /Bicycle Bridge
R
Study the ability to shorten ramps by providing adhering to the ADA requirement to provide
landings for every 30 inches of rise for a resulting grade of approximately 7 percent versus
5 percent.
Complete detailed geotechnical study to determine final design level information.
Perform final design of plan and profile for selected trail alignment.
Perform final structural design of preferred bridge structure and approaches.
Explore property acquisition alternatives.
Update environmental study and include costs for permitting and mitigations.
Continue coordination with stakeholders.
Asses parking impact with the property owner.
City of Tukwila
Pedestrian /Bicycle Bridge
83
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Citv of Tukwila
Transportation Committee
TRANSPORTATION COMMITTEE Meeting Minutes
flugust 15, 2011 S: 00 p. m. Conference Room 1
PRESENT
Councilmembers: Joan Hernandez, Chair; Joe Duffle and Verna Seal
Staff: Bob Giberson, Frank h Robin Tischmak, Cyndy Knighton, Peter Lau, Jack Pace, Derek
Speck, Shawn Hunstock, Gail Labanara and Kimberly Matej
CALL TO ORDER: The meeting was called to order at 5:02 p.m.
I. PRESENTATIONS
No presentations.
H. BUSINESS AGENDA
A. Grant Applications: 2011 Transportation Improvement Board Funding Programs
Staff is seeking Committee approval to submit two projects /grant applications to the Washington State
Transportation Improvement Board (TIB) 2011 Funding Program.
Upon approval, staff will submit applications for the Capital Improvement Projects (CIP) listed below:
Andover Park West Tukwila Parkway to Strander Boulevard
Interurban Avenue South— South 143` Street to Fort Dent Way
If awarded, funding will require a minimum 20% match. Fund recipients are expected to be announced in
November. UNANIMOUS APPROVAL. SUBMIT GRANT APPLICATIONS.
B. 2011 Overlav and Repair Program Construction Management: Consultant Selection and Agreement
Staff is seeking full Council approval to enter into a contract with Anchor QEA, LLC in the amount of
$104,708 for construction management services for the 2011 Overlay Program.
Anchor QEA was identified as the best selection of five firms considered from the Municipal Research and
Services Center (MRSC) consultant roster. The 2011 Program will provide roadway and overlay repairs at
four locations, including one additive item (see Transportation Committee minutes dated June 20, 2011).
The City has $150,000 budgeted for construction management services for the 2011 Overlay Program.
Current construction management contracts total $149,554.52 UNANIMOUS APPROVAL. FORWARD
TO AUGUST 22 COW FOR DISCUSSION.
C. Tukwila Urban Center (TUC) Pedestrian/Bicvcle Bridge: Tvue. Size and Location Studv
As an information only item, staff reviewed the processes to date that have resulted in the draft Type, Size
and Location (TSL) Report for the TUC Pedestrian/Bicycle Bridge. This project is being reintroduced to the
Committee and Council due to two recently received grants totaling over $1.2 million that will fund
completion of the bridge design.
Staff highlighted the project history which initially began with the 1995 Comprehensive Plan Urban
Center Goals, and a preview of the draft Type, Size and Location Report (see staff distributed PowerPoint
attached to Committee minutes). Staff will distribute the TSL Report to Committee members next week, and
will return to the Committee on September 6 to discuss this project further. In addition to seeking
Committee direction on next steps after reviewing the TSL Report, staff will ask the Committee if they
would like this item to go forward to a COW.
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