route 20 over skaneateles creek winter bridge replacement ... · route 20 over skaneateles creek...
TRANSCRIPT
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Route 20 over Skaneateles CreekWinter Bridge Replacement Project
Presented by:
With NYSDOT Region 3Slate Hill Constructors
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Project Location
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Project Objectives
• To replace a one-span bridge in a historically sensitive area
• However, the nature of the location presented many challenges…
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Village of Skaneateles
• There is always something happening (Winter, Spring, Summer, Fall)
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Winter in Skaneateles
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Spring in Skaneateles
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Summer in Skaneateles
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Fall in Skaneateles
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And of course……
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Existing Structure
• 33-foot, single-span jack arch • 87 feet wide• Stone abutment on unknown foundation• Four travel lanes with parking• Two 10-foot sidewalks• On National Highway System• AADT = 12,300• Heavy truck traffic • Gas, water, telephone, electric, cable
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Where’s the Bridge?
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Where’s the Foundation?
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Originally Scoped as Rehabilitation
• Superstructure on existing abutments
• Diving inspection determined that foundation support was uncertain
• Wingwall foundations consisted of timber piles with significant undermining
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Replacement Required• Existing stone abutments, poor sub soils
• Location of restaurant and alley
• Construction between Labor Day and Memorial Day, only
• Maintain single lane of traffic in each direction (complete closure not possible)
• Maintain pedestrian traffic
• Maintain aesthetics of historic setting
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• So, how were the goals achieved?
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Proposed Plan
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Details
• Bored in piles through existing stone abutments
• Integral abutments• Inverset superstructure
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Elevation
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Winter in Skaneateles
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Construction – Stage 1
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Construction – Stage 1
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Construction – Stage 1
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Construction – Stage 1
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Construction – Stage 1
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Construction – Stage 1
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Construction – Stage 2
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Construction – Stage 2
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Construction – Stage 2
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Construction – Stage 2
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Field Changes
• Village requested more historically sensitive guide railing
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Four Rail with Pickets
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Ceremonial Grand Opening
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Completed Project
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Completed Project
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Lessons Learned
• Collaborative partnership between NYSDOT, the consultant and the contractor produces the best results.
• Bored-in piles with an integral abutment and inverest superstructure is an economical alternative.
• Allows for staged and/or Winter construction.
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Questions?