Update on Final Design & Bridge Types for New Main Span
Kosciuszko Bridge Project – Open HousesNew York State Department of Transportation February 18 & 24, 2010
Agenda
• Welcome
• Recap completion of Environmental Review Process
• Update on Final Design activities
• Review bridge types for a new Main Span of bridge
• Get your input on bridge concepts
Environmental Review Process
• Addressed comments received on Draft EIS
• Completed agency coordination to resolve remaining issues
• Published Final EIS in December 2008
• Bridge Replacement Alternative BR-5 is the preferred alternative
Environmental Review Process
• Record of Decision (ROD) signed by FHWA on March 9, 2009
• Approved Alternative BR-5 as the selected alternative
• Granted NYSDOT authorization to proceed with Final Design
Alternative BR-5
• Replace existing bridge
• New bridge built on E/B side of existing bridge
• Maintain 6 lanes of traffic throughout construction
Alternative BR-5
Construct E/B portion of new structure adjacent to existing bridge
Westbound Eastbound
Existing Bridge Construct New Bridge
Alternative BR-5
Shift traffic onto new structure and demolish existing bridge
Existing Bridge New Bridge
Westbound EastboundWestbound Eastbound
New Bridge
Alternative BR-5
Shift traffic onto new structure and demolish existing bridge
Existing Bridge New Bridge
Westbound EastboundWestbound Eastbound
New Bridge
Alternative BR-5
Construct W/B portion of new structure within footprint of existing bridge
New BridgeConstruct New Bridge
Westbound Eastbound
Alternative BR-5
• Lower elevation – improved roadway grades & sight distances
• Standard lane & shoulder widths
Proposed Roadway
Westbound Eastbound
Alternative BR-5
• Auxiliary lanes in both directions –improved merging & weaving
• New bikeway/walkway
Proposed Roadway
Westbound Eastbound
Field Survey
• Determined locations of physical features & topographic information
• Ensure final design is progressed reflecting accurate field conditions
Geotechnical Investigation
• Collected subsurface information for design & construction of new bridge
• Soil drilling & sampling, rock coring & test pits at locations in Brooklyn and Queens
Environmental Investigation
• Identifying material handling & disposal options during construction
• Collected soil borings to determine soil & groundwater quality
• Performing asbestos field survey of bridge and all buildings to be removed or modified during construction
Right-of-Way AcquisitionsPrivate Property Acquisitions – Brooklyn
Temporary Easement Permanent EasementProposed Structure Fee Acquisition
Right-of-Way AcquisitionsPrivate Property Acquisitions – Queens
Temporary Easement Permanent EasementProposed Structure Fee Acquisition
Right-of-Way Acquisitions
• Initiated process to acquire properties needed for project – Fee Acquisitions, Permanent Easements & Temporary Easements
• Preparing Acquisition Maps
• Making offers & continuing negotiations with affected owners & tenants
Parks & Open Space Planning• Extensive coordination with
NYC Dept. of Parks & Recreation
• Continued input from Stakeholders’Advisory Committee
• New and improved Sgt. Dougherty Playground (Brooklyn)
• New Open Space (Brooklyn/Queens)
Parks & Open Space PlanningProposed Parks - Brooklyn
Proposed Park
Bikeway/Walkway
Enhanced Streetscape
Shoreline Restoration
Possible Boat Launch Area
Pedestrian Underpass
Parks & Open Space PlanningProposed Parks - Queens
Proposed Park
Bikeway/Walkway
Enhanced Streetscape
Shoreline Restoration
Possible Boat Launch Area
Pedestrian Underpass
Bridge Type for New Main Span• Main Span – portion of bridge that crosses Newtown Creek
• Approach Spans – would be the same for any Main Span concept
• 4 Main Span concepts presented tonight
• Obtained SAC input on bridge concepts
Bridge Type for New Main Span• Project Team cannot begin detailed bridge design until a bridge type is selected
• NYSDOT desires public input prior to selection of preferred Main Span type
Following Public Input• Conduct Main Span selection process
• Evaluate potential impacts of bridge types – not included in EIS
• Continue agency coordination• Continue public involvement process
Following Public Input• NYSDOT to select new Main Span (2010)
• Detailed bridge design begins (2010)• Complete ROW acquisitions (2013)• Begin Bridge Construction (2014)
Conceptual Bridge Design
All bridge types under consideration will:
• Provide safety, operational & structural improvements
• Mitigate environmental impacts
• Incorporate environmental enhancements
• Maintain 6 lanes of traffic during construction
Bridge Segments
New Calvary Cemetery
Calvary Cemetery
Newtown Creek
Connectors• Retained Earth and
Steel Girder Spans
ConnectorSteel Girder
Retained Earth
Bridge Segments
New Calvary Cemetery
Calvary Cemetery
Newtown Creek
Approaches• Box Girder
(Steel or Concrete)
Approach Box Girder
Concrete Column
Main Span Options
Main Span – 4 options presented • Box Girder (Steel or Concrete)• Deck Arch (Concrete)*• Through Arch (Steel)*• Cable-Stayed*
*Recommended by SAC
New Main Span Selection Criteria
• Constructability
• Construction Duration
• Safety / Security
• Construction Cost
• Life Cycle (Maintenance) Cost
• Visual Aesthetics
• Other Evaluation Factors
New Main Span Selection Criteria
• Constructability
• Construction Duration
• Safety / Security
Essentially the same for all options
Constructability
All Main Span Options will:• Maintain 6 lanes of traffic during
construction• Maintain navigable waterway during
construction• Remove existing bridge piers• Rebuild bulkhead• Allow material transport by barge• Require the special handling and
disposal of contaminated soils
Construction Duration
All Main Span Options will:• Have an estimated bridge construction
duration of 5 years
• Although time to construct Main Span will vary between options, the overall construction duration will be the same for all options
Safety & Security
All Main Span Options will:• Improve driver’s sight distance • Provide full shoulders to allow disabled
vehicles to pull over• Provide a redundant structure• Meet current seismic design standards• Have a minimum 75-year service life
New Main Span Selection Criteria
• Construction Cost
• Life Cycle (Maintenance) Cost
Some differences between options
Construction Cost
• The difference in total construction cost for all options is within +/- 4%of each other
Main Span
Brooklyn Approach
Brooklyn Connector
Queens Approach
Queens Connector
Life Cycle (Maintenance) Cost
• All options require inspection and maintenance, including roadway resurfacing and re-striping
• Steel options require painting of steel members
• Through Arch and Cable-Stayed options require eventual replacement of cables and anchorages
New Main Span Selection Criteria
• Visual Aesthetics
• Other Evaluation Factors
Differences between options
Visual Aesthetics
Focus of 3D animations & conceptual drawings are on Visual Aesthetics:• Views from various points within the
project area• Driver perspective• Pedestrian/bicyclist perspective
Other Evaluation Factors
Evaluate other factors of new Main Span bridge types:
• Aviation (flight patterns)
• Existing wildlife
What we need from you
• Please visit the information stations
o 4 stations - new bridge types for Main Span
o 1 station - general project information
• Complete the survey and return to a Project Team member
Please share your thoughts and let us know your preferences!