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Route 20 over Skaneateles CreekWinter Bridge Replacement Project
Presented by:
With NYSDOT Region 3Slate Hill Constructors
Project Location
Project Objectives
• To replace a one-span bridge in a historically sensitive area
• However, the nature of the location presented many challenges…
Village of Skaneateles
• There is always something happening (Winter, Spring, Summer, Fall)
Winter in Skaneateles
Spring in Skaneateles
Summer in Skaneateles
Fall in Skaneateles
And of course……
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
Where’s the Bridge?
Where’s the Foundation?
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
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
• So, how were the goals achieved?
Proposed Plan
Details
• Bored in piles through existing stone abutments
• Integral abutments• Inverset superstructure
Elevation
Winter in Skaneateles
Construction – Stage 1
Construction – Stage 1
Construction – Stage 1
Construction – Stage 1
Construction – Stage 1
Construction – Stage 1
Construction – Stage 2
Construction – Stage 2
Construction – Stage 2
Construction – Stage 2
Field Changes
• Village requested more historically sensitive guide railing
Four Rail with Pickets
Ceremonial Grand Opening
Completed Project
Completed Project
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.
Questions?