I-74 Iowa-Illinois Corridor               Presentation to:     Iowa DOT Commission          May 8, 2012          Ames, Iow...
1935    • Original bridge        Original bridge        opened.      • Cost: $1.5 million
1960       • Second bridge         opened.       • Cost: $6.2 million
1970’s• Iowa and Illinois took  over ownership• Toll Booths Removed.• I-74 was connected.
Today• 2010 traffic: 61,500  vehicles per day• 2035 estimated  traffic: 98,500 VPD• Poor geometrics for  an interstate rou...
1998 Major Investment Study  Needed Improvement Locations
I-74 Corridor Study          Milestones2000: I-74 Corridor Study began2003: Draft Environmental Impact Study completed2...
Corridor Study Limits
Mississippi River Crossing      Preferred Alternative
Finalist Bridge Types                              • Scheme 1 - Basket Handle True Arch Twin Bridge•Aerial view           ...
Finalist Bridge Types  •Scheme 2 - Modified Basket Handle Tied Arch Twin Bridges with Vertical Pier and Vertical Hangers•A...
Finalist Bridge Types        •Scheme 3 - Basket Handle Tied Arch Twin Bridges with Vertical Pier and Vertical Hangers•Aeri...
Finalist Bridge Types                 • Scheme 4 - Cable Stayed Single Bridge with Semi-Fan Stay Arrangement•Aerial view  ...
Selected Alternative: BasketHandle True Arch Twin Bridge
I-74 Project Locations
Central Section Cost Estimate (YOE)
Central Section DesignPreliminary Design• Completed in April 2009• $9.1 Million in Consultant Services (Iowa share)• $0.3 ...
Iowa ROW SummaryROW Purchased (Central & North Sections)• 47 Parcels• $6.9 MillionROW to be Purchased (Central Section)• 7...
Illinois ROW SummaryROW Purchased• 7 Parcels• $0.7 MillionROW to be Purchased• 59 Parcels• $3.8 Million
Iowa Investment to Date•   ROW              $ 6.9 Million•   Design           $19.5 Million•   Construction     $16.3 Mill...
Iowa Cost Estimate                 Phase I                 2013-2017ROW                               $16.9 MConstruction ...
Iowa Cost Estimate            Phase II – Central Section                 Beyond 2017, $ in YOEMain Span                   ...
Illinois Cost Estimate          Phase II – Central Section             Beyond 2017, $ in YOEMain Span                     ...
Central Section Cost Estimate                YOE      IOWA            ILLINOIS     $494.6 M         $665.6 M
Iowa Cost EstimateTotals• Completed Work              $ 44.8 M• Phase I                     $ 51.4 M• Phase II            ...
Anticipated Maintenance Cost (Iowa Share) Option 1 – In service until 2025 • Main Bridge                    $ 3.0 M • Appr...
Corridor Federal Funding• Earmarks             $74.6 Million• Unobligated Amount   $ 7.2 Million
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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 of "May 8, 2012 Commission Presentation"

    1. 1. I-74 Iowa-Illinois Corridor Presentation to: Iowa DOT Commission May 8, 2012 Ames, IowaMitchell Dillavou– Director, Engineering Bureau
    2. 2. 1935 • Original bridge Original bridge opened. • Cost: $1.5 million
    3. 3. 1960 • Second bridge opened. • Cost: $6.2 million
    4. 4. 1970’s• Iowa and Illinois took over ownership• Toll Booths Removed.• I-74 was connected.
    5. 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. 6. 1998 Major Investment Study Needed Improvement Locations
    7. 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. 8. Corridor Study Limits
    9. 9. Mississippi River Crossing Preferred Alternative
    10. 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. 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. 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. 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. 14. Selected Alternative: BasketHandle True Arch Twin Bridge
    15. 15. I-74 Project Locations
    16. 16. Central Section Cost Estimate (YOE)
    17. 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. 18. Iowa ROW SummaryROW Purchased (Central & North Sections)• 47 Parcels• $6.9 MillionROW to be Purchased (Central Section)• 79 Parcels• $16.9 Million
    19. 19. Illinois ROW SummaryROW Purchased• 7 Parcels• $0.7 MillionROW to be Purchased• 59 Parcels• $3.8 Million
    20. 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. 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. 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. 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. 24. Central Section Cost Estimate YOE IOWA ILLINOIS $494.6 M $665.6 M
    25. 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. 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. 27. Corridor Federal Funding• Earmarks $74.6 Million• Unobligated Amount $ 7.2 Million
    28. 28. Questions?
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