HomeMy WebLinkAboutTIS 2021-05-24 Item 2F - Update - 42nd Avenue South Bridge ReplacementCitv of Tukwila
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INFORMATIONAL MEMORANDUM
TO: Transportation and Infrastructure Services Committee
FROM: Hari Ponnekanti, Public Works Director/City Engineer
BY: Adam Cox, Transportation Program Manager
CC: Mayor Allan Ekberg
DATE: May 21, 2021
SUBJECT: 42nd Ave South Bridge Replacement Project
Project No. 91810404
Project Update and Next Steps
ISSUE
Provide a quarterly update and information regarding the 42nd Ave South Bridge Replacement Project
and next steps moving forward.
BACKGROUND
City Infrastructure Priority Project
The 42' Ave S Bridge was built in 1949 and is reaching the end of its useful life. Built to last 75 years, it
turned 72 years old in 2021. The 42nd Ave S. bridge is a critical bridge and infrastructure link that serves
an important residential community, Allentown, key community assets such as the Tukwila Community
Center (TCC), several businesses and is a key link to other nearby communities such as Skyway. The
Bridge currently is used by approximately 10,000 vehicles per day.
The current need to replace the 42nd Ave South Bridge has been listed as the City's top state and
federal priority due to its low sufficiency rating (currently at 7.56 out of 100) and concerns of failure. The
City applied for state and federal grant funds in 2017 and 2019 for bridge replacement and was
unsuccessful. To be more competitive in the next round of the state two-year grant cycle as well as
other state and federal grants, the City approved a 30% design contract with TranTech Engineering,
LLC in November 2020 for $1.1 million. Based on the initial work from this design contract, the City
applied for the next round of state grant funding for 42nd Ave S Bridge Replacement Project in February
2021. The state is expected to do an on-site review in August 2021 and make a grant determination by
fall 2021. City and TranTech representative have been working closely with the state and federal
delegations to secure the full $2.5 million to replace this critical bridge.
Historical Perspective 42nd Ave S Bridge Replacement Timeline
Shown below are activities associated with replacing the 42nd Ave S Bridge due to end -of -life concerns:
Date
Activity
May 2013
•
Skagit Bridge Collapse on 1-5. Similar bridge design as 42nd Ave S Bridge
2015
•
City receives updated rating of bridge with a sufficiency rate of 17.29 (see
section below on history of inspections and sufficiency ratings)
March 2017
•
City Engineer's Bridge Inspection Report stated 42nd Ave S Bridge has
Sufficiency Rating of 19.44 and recommended replacement or rehabilitation.
April 2017
•
City applies for state and federal grant funding (BRAC) for 42nd Ave S Bridge
Replacement
https://tukwilawa.sharepoint.com/sites/publicworks/engineering/PW Drop Box/01 TIC Agenda/2021 Agenda Items/TIC 05-24-21/f. 42nd Ave S Bridge Rplcmnt Update/Info Memo_42nd Ave S Bridge Design Update_202184712,docx
Info Memo
42nd Ave S Bridge
Date
Activity
December 2017
•
City receives notification that 42nd Ave S Bridge did not receive state and
federal grant funding (BRAC)
February 2018
•
Council adopts Ordinance No. 2566 restricting speeds on 42nd Ave S Bridge
April 2019
•
City applied for state and federal grant funding (BRAC ) for 42nd Ave S Bridge
July 2019
•
City receives updated rating of bridge with a sufficiency rate of 7.56
September 2019
•
Transportation & Infrastructure Services (TIS) Committee discussed State of
the Bridges Report, which Chair Idan reported on to the full Council
November 2019
•
City receives notification that 42nd Ave S Bridge did not receive state grant
funding (BRAC)
November 2019
•
Council Adopts Legislative Priorities with 42nd Ave S Bridge Replacement as a
top capital priority
December 2019
•
TIS Committee requested additional analysis to weigh options
February 2020
•
TIS Committee discussed next steps for 42nd Avenue South, including need to
fund design to make shovel -ready project
Finance Committee discussed funding
April 2020
•
Surface Transportation Program (STP) funding pursued through Puget Sound
Regional Council (PSRC)
July 2020
•
42nd Avenue South Bridge in-depth inspection and closure
September 2020
•
42nd Avenue South Bridge in-depth inspection confirmed bridge is approaching
end of service life and the cost of repair would exceed the replacement cost
November 2020
•
Council adopts contract for 42nd Ave S. 30% design
February 2021
•
City applied for state and federal grant funding (BRAC) for 42nd Ave S Bridge
2021
•
•
•
•
Administration and staff met with Representative Adam Smith to request a $1.7M
earmark for FY 2022 to finish the design of the bridge; Congressman Smith
indicated he was supportive of the request
Senator Murray's office requested infrastructure funding priority list from
jurisdictions in advance of the coming federal infrastructure package. Staff
requested $17 million for construction; the Port of Seattle has written a letter of
support to the delegation
With the sponsorship of Representative David Hackney and the assistance of
David Foster (State lobbyist), Representative Fey included $17 million in funding
for the construction of the 42nd Ave. Bridge in his proposed House transportation
package. With support from Senator Hasegawa, $17 million is also included in
the Senate transportation package. Both transportation packages were not acted
upon in the 2021 legislative session, but are expected to be taken up in future
sessions
City receives notice of $1.5 million PSRC grant to be used to complete the design
of 42nd Ave. S. Bridge Replacement
42nd Ave S Bridge Sufficiency Rating
The City has been monitoring the Sufficiency Rating (SR) of the bridge through routine and fracture
critical inspections. Sufficiency Ratings were developed by the Federal Highway Administration to serve
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Info Memo
42nd Ave S Bridge
as a prioritization tool to allocate funds. The rating varies from 0 percent (poor) to 100 percent (very
good). The formula considers structural adequacy, whether the bridge is functionally obsolete, and level
of service provided to the public. The SR is calculated, based 55% on the structural evaluation, 30% on
the obsolescence of its design, and 15% on its importance to the public.
The inspection records obtained by the City illustrates that the Sufficiency Rating (SR) of the 42nd Ave
S Bridge began in 1994 and is calculated during the routine and fracture critical inspection. The 1994
inspection report states that the SR of the bridge was 51.04. The SR hovered between 51 to 54 from
1994 to 2009. Then in 2011 through 2013 the SR increased to 72 and then dropped to 17.29 in 2015.
The SR then dropped again in 2019 to the current 7.56. Please refer to the graph below for the SR over
the last 17 years.
ufficiericy Rating 1991 tI rou h 2C.19
Additional research was performed to investigate the drop of 54 points (from 72 to 17) from 2013
through 2015. The City met with current King County bridge inspectors to understand the precipitous
drop in the SR in such a short timeframe. Recognizing the original inspectors from 2013 and 2015 have
since retired, and that the City's former bridge engineer during this time recently passed away, the
following are the stated reasons for this change in rating;
• Rating change from Satisfactory to Fair/Poor: Both the superstructure (steel truss) and
substructure (concrete bridge piers) went from satisfactory condition (6 in the NBI ratings) to Fair
for the superstructure (5 in the NBI ratings) and Poor for the substructure (4 in the NBI ratings)
• Load ratings reduced: The load ratings during the timeframe also reduced the Inventory Rating
or Capacity Rating from 33 tons to 16 tons; then to 14 tons in 2019
• Actual clearance was lowered: Previous inspections had clearance incorrectly rated at 15' 07"
which was lowered to the actual clearance of 15'.
• Weight and Speed Restrictions: In 2017 through 2019 the bridge analysis was performed to
enforce weight and speed restrictions for trucks to ensure that the bridge would remain
operational beyond the designed life expectancy.
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Info Memo
42nd Ave S Bridge
Summary:
The deterioration of sufficiency ratings (SR) shows the bridge is not effectively supporting the capacity
and load requirements needed to be efficient, and its poor structural integrity makes it a hazard. If one
or more of the beams were impacted by a large seismic event or vehicle collision, it could cause the
bridge to collapse into the river.
The bridge has been maintained properly and inspected regularly to make the bridge last the entire
design life. The King County Bridge Inspector inspected the bridge on Tuesday, April 20, 2021. The
preliminary indications illustrated that it is no worse than expected, and the county will provide an
inspection report within the next few months.
Community Outreach Update and Next Steps
Community outreach is a critical component of the 30% design process. City staff, TranTech
Engineering LLC, and Envirolssues, a communications consultant, conducted a Zoom meeting on
March 30th with representatives from Allentown to inform the residents of the next steps for the 42nd Ave
S Bridge Replacement Project design and to receive input from the residents on how to engage the
entire Allentown community for steps moving forward. A follow-up meeting with Allentown
representatives was held on May 4, 2021. A community open house will take place in summer of 2021
to gather community feedback for the Type, Size, & Location (TS&L) report for the 42nd Ave S Bridge.
Findings for the TS&L report will be shared with the public at a virtual meeting in fall of 2021.
TranTech Engineering has progressed the following design items for the 30% plans and estimate and
the type, size, and location study:
• Surveying — Complete
• Geotechnical — Collected enough data for the TS&L
• Aesthetics — Oh hold until the public meeting
• Traffic Engineering — First report completed. Traffic is on -hold until TS&L report
• Roadway/Utilities — Alignments have been created using the surveying data. Utilities will be
investigated more in the TS&L report
• Structural Design — Once roadway alinement is complete, the structural analysis can be
performed for the TS&L report
• Constructability — Constructability study will be performed once the structural analysis is
complete
FISCAL UPDATE
The City applied for $1.5M in federal Surface Transportation Program (STP) funds from the Puget
Sound Regional Council (PSRC) to complete 100% design of the 42nd Ave S Bridge Replacement
Project. This funding has been approved by PSRC and will be brought to Council once the award
letter has been received.
RECOMMENDATION
Discussion only.
Attachments: 2021-2016 CIP Page 9
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CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2021 to 2026
PROJECT: 42nd Ave S Bridge Replacement Project No. 91810404
DESCRIPTION: Design and construct a replacement structure for the existing 42nd Ave S Bridge near the Tukwila Community
Center. Council approved 30% design with City funding of $1 M in 2020, remaining scheduled in 2022.
JUSTIFICATION: The current bridge has a sufficiency rating of 7.6 (out of 100), is load restricted for AASHTO Type 3 trucks
and is structurally deficient. Truck speed was reduced to 15 mph in 2018.
In 2017 and 2019, Bridge Replacement Advisory Committee (BRAC) funding was submitted, but not awarded
STATUS: Staff will apply for future BRAC funding during the next call. Applying for STP funding in 2020 for $1.5m for
design.
MAINT. IMPACT: New bridge.
STP funding has 13.5% match requirement. BRAC funding would be at 80% match for up to $12 million. Project
COMMENT: partners may include FMSIB & BNSF Railroad as they have over 1,800 trips a day on the 42nd Ave S Bridge
and it is the only ingress/egress available for their intermodal yard. Also State TIB for $3M.
FINANCIAL Through Estimated
(in $000's)
2019 2020 2021
2022 2023 2024 2025 2026 BEYOND TOTAL
EXPENSES
Design
19
200
878
1,252
2,349
Land (R/W)
30
30
Const. Mgmt.
250
1,650
1,650
3,550
Construction
7,800
7,800
15,600
TOTAL EXPENSES
19
200
878
0
1,532
9,450
9,450
0
0
21,529
FUND SOURCES
Awarded Grant
0
Proposed BRAC Grant
6,000
6,000
12,000
Proposed STP Grant
1,000
1,000
2,000
Proposed TIB
1,500
1,500
3,000
Proposed FMSIB
500
500
Solid Waste Utility Tax
650
700
700
710
720
549
4,029
City Oper. Revenue
19
200
228
(700)
832
240
0
0
TOTAL SOURCES
19
200
878
0
1,532
9,450
9,450
0
0
21,529
i"rOjeCt L000
2021 - 2026 Capital Improvement Program
9
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