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May 8, 2012 Commission Presentation
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May 8, 2012 Commission Presentation

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  • The Draft EIS in 2003 included 3 river crossing options and 2 interchange configurations at each local service interchange. In January 2005, the DOTs along with the MPO Bi-State, identified at the Preferred Alternative. For each interchange location, the community where the interchange was located was consulted about their preferences for the local access configuration. In 2004, we undertook additional traffic and operational studies in Davenport, Bettendorf and Moline to confirm the interchange operations and gain a consensus on the preferred design. This was a key element and the DOTs and study team took great efforts to work with our local partners so each jurisdiction was in support of the Preferred Alternative. I-74 would be widened and reconstructed to 3 basic lanes in each direction, with auxilliary lanes in much of the corridor. I-74 would be widened and reconstructed to 3 basic lanes in each direction, with auxilliary lanes in much of the corridor.

Transcript

  • 1. I-74 Iowa-Illinois Corridor Presentation to: Iowa DOT Commission May 8, 2012 Ames, IowaMitchell Dillavou– Director, Engineering Bureau
  • 2. 1935 • Original bridge Original bridge opened. • Cost: $1.5 million
  • 3. 1960 • Second bridge opened. • Cost: $6.2 million
  • 4. 1970’s• Iowa and Illinois took over ownership• Toll Booths Removed.• I-74 was connected.
  • 5. Today• 2010 traffic: 61,500 vehicles per day• 2035 estimated traffic: 98,500 VPD• Poor geometrics for an interstate route• The bridges are functionally obsolete
  • 6. 1998 Major Investment Study Needed Improvement Locations
  • 7. I-74 Corridor Study Milestones2000: I-74 Corridor Study began2003: Draft Environmental Impact Study completed2005: Preferred Alternative identified2006: Main Span Bridge Type chosen2007: Preliminary Engineering completed2009: Final Environmental Impact Study, and Federal Highway Admin. Record of Decision
  • 8. Corridor Study Limits
  • 9. Mississippi River Crossing Preferred Alternative
  • 10. Finalist Bridge Types • Scheme 1 - Basket Handle True Arch Twin Bridge•Aerial view •River view •Bettendorf shoreline view•Approach view •Motorist’s view
  • 11. Finalist Bridge Types •Scheme 2 - Modified Basket Handle Tied Arch Twin Bridges with Vertical Pier and Vertical Hangers•Aerial view •River view •Bettendorf shoreline view•Approach view •Motorist’s view
  • 12. Finalist Bridge Types •Scheme 3 - Basket Handle Tied Arch Twin Bridges with Vertical Pier and Vertical Hangers•Aerial view •River view •Bettendorf shoreline view•Approach view •Motorist’s view
  • 13. Finalist Bridge Types • Scheme 4 - Cable Stayed Single Bridge with Semi-Fan Stay Arrangement•Aerial view •River view •Bettendorf shoreline view•Approach view •Motorist’s view
  • 14. Selected Alternative: BasketHandle True Arch Twin Bridge
  • 15. I-74 Project Locations
  • 16. Central Section Cost Estimate (YOE)
  • 17. Central Section DesignPreliminary Design• Completed in April 2009• $9.1 Million in Consultant Services (Iowa share)• $0.3 Million Iowa DOT StaffFinal Design• $9.7 Million expended to date (Iowa Share)• 71% Complete• $13.0 Million Consultant Services funds to be expended (Iowa share)• $5.5 Million Iowa DOT Staff funds to be expended
  • 18. Iowa ROW SummaryROW Purchased (Central & North Sections)• 47 Parcels• $6.9 MillionROW to be Purchased (Central Section)• 79 Parcels• $16.9 Million
  • 19. Illinois ROW SummaryROW Purchased• 7 Parcels• $0.7 MillionROW to be Purchased• 59 Parcels• $3.8 Million
  • 20. Iowa Investment to Date• ROW $ 6.9 Million• Design $19.5 Million• Construction $16.3 Million• Iowa DOT Staff $ 2.1 Million Total $44.8 Million
  • 21. Iowa Cost Estimate Phase I 2013-2017ROW $16.9 MConstruction $13.7 MMaintenance of Existing Bridges $ 2.3 MIowa DOT Staff $ 5.5 MConsultant Engineering (design) $13.0 M $51.4 M
  • 22. Iowa Cost Estimate Phase II – Central Section Beyond 2017, $ in YOEMain Span $118.2 MApproach Span $123.1 MViaducts $128.9 MMainline Roadway $ 40.2 MBridge Demolition $ 15.3 MMaintenance of Existing Bridges $ 3.5 MLighting, Signing, Landscaping, ITS $ 23.5 MConsultant Engineering (Constr.) $ 40.9 MIowa DOT Staff $ 1.0 M $494.6 M
  • 23. Illinois Cost Estimate Phase II – Central Section Beyond 2017, $ in YOEMain Span $118.2 MApproach Span $123.1 MViaducts & Mainline Roadway $356.1 MBridge Demolition $ 17.2 MLighting, Landscaping, ITS $ 10.1 MConsultant Engineering (Constr.) $ 40.9 M $665.6 M
  • 24. Central Section Cost Estimate YOE IOWA ILLINOIS $494.6 M $665.6 M
  • 25. Iowa Cost EstimateTotals• Completed Work $ 44.8 M• Phase I $ 51.4 M• Phase II $494.6 M• Phase III (North Section) $202.5 MTotal Cost $793.3 M
  • 26. Anticipated Maintenance Cost (Iowa Share) Option 1 – In service until 2025 • Main Bridge $ 3.0 M • Approach Bridges $ 2.8 M • Total $ 5.8 M Option 2 – In service until 2035 • Main Bridge $14.2 M • Approach Bridges $ 8.7 M • Total $22.9 M
  • 27. Corridor Federal Funding• Earmarks $74.6 Million• Unobligated Amount $ 7.2 Million
  • 28. Questions?