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I-70 Blanchette Bridge 2020-2021
Rehabilitation Eastbound I-70
- ver the Missouri
Existing Eastbound Bridge
- 3700’ Long
- Bridge Truss (3 spans)
- Steel Plate Girder (16 spans)
I-70 Blanchette Bridge 2020-2021 Rehabilitation Eastbound I-70 - - PowerPoint PPT Presentation
I-70 Blanchette Bridge 2020-2021 Rehabilitation Eastbound I-70 - - PowerPoint PPT Presentation
I-70 Blanchette Bridge 2020-2021 Rehabilitation Eastbound I-70 over the Missouri River Existing Eastbound Bridge 3700 Long Bridge Truss (3 spans) Steel Plate Girder (16 spans) Bridge history Opened in 1978 Provided
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Bridge history
Opened in 1978
− Provided separate eastbound bridge
Major rehab in 2005
− Expansion Joint replacement − Repairs to deck, structural steel, substructure − Full paint overcoated original paint
2005 to present
− Driving surface repair, crack repairs
Current Operations
− 5 lanes on a 68-ft roadway − 77,000 vehicles per day on eastbound bridge
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Upcoming needed Maintenance
Full Paint Replacement Expansion Joints Barrier Wall Repair Structural Repairs Epoxy Overlay
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Why didn’t MoDOT do this in 2012-2013?
Components were not
to end of useful life yet
Required to utilize
companion Bridge to manage traffic
Project accelerated to
2020 from 2021 original start date because of I- 270 North Design Build Project
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Traffic Impacts
Westbound I-70 bridge traffic reduced to 3 WB
Lanes + 2 EB Lanes separated by barrier
Eastbound I-70 bridge traffic reduced to 2 EB
Lanes during peak commuting times
Nighttime closure of the Eastbound bridge and
EB70 on ramps from 5th Street
Closure of S. 5th Street beneath Blanchette for joint
replacement
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I-70 Traffic Configuration for 2020
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Schedule
Construction contract expected to be awarded in
January
Construction starts March 2020 Goal to have major traffic restrictions completed
by Thanksgiving 2020. Closures will continue in
- 2021. Lane restrictions on Eastbound I-70 only (4
lanes open, additional lane closures off-peak)
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Fifth Street Access
Full-duration closure of Eastbound I-70 onramp (VMP) Nighttime closures Eastbound I-70 onramp (5th) Traffic detoured to MO-364 via S. River Road
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South Main Street
Short-term closures for expansion joint rehab &
painting
Traffic detoured to 5th Street Coordination with City of St. Charles
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Katy Trail
Short-term closures to allow overhead rehab work Coordination with Dept. of Natural Resources On-street detour available during long-term closures
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Alternate Routes
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Key Stakeholders
St. Charles County businesses Maryland Heights/North Co businesses Hospitals Emergency responders Attractions/Event facilities Regional major employers St. Charles/St. Louis commuters Regional, state and national trucking companies Interstate travelers
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Key Stakeholder Issues
Access on I-70, at Fifth Street, at Earth City Schedule for the work and its impacts Availability and location of alternate routes Increased commute times Increased congestion on alternate routes Emergency response time to the bridge Increased trucking delivery times
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Initial Public Outreach
Creation of I-70 Blanchette Bridge
Community Advisory Committee
− High level regional issues − Representatives from St. Charles and St.
Louis sides of the project
− Provide information to regions they
represent
Presentations to groups Media Outreach over winter 2019-2020 Web page on https://www.modot.org/i-70-
blanchette-bridge-project
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