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Semelhante a May 8, 2012 Commission Presentation
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May 8, 2012 Commission Presentation
- 1. I-74 Iowa-Illinois Corridor Presentation to: Iowa DOT Commission May 8, 2012 Ames, Iowa Mitchell 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
- 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: Basket Handle True Arch Twin Bridge
- 16. Central Section Cost Estimate (YOE)
- 18. Central Section Design Preliminary Design • Completed in April 2009 • $9.1 Million in Consultant Services (Iowa share) • $0.3 Million Iowa DOT Staff Final 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
- 19. Iowa ROW Summary ROW Purchased (Central & North Sections) • 47 Parcels • $6.9 Million ROW to be Purchased (Central Section) • 79 Parcels • $16.9 Million
- 20. Illinois ROW Summary ROW Purchased • 7 Parcels • $0.7 Million ROW to be Purchased • 59 Parcels • $3.8 Million
- 21. 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
- 22. Iowa Cost Estimate Phase I 2013-2017 ROW $16.9 M Construction $13.7 M Maintenance of Existing Bridges $ 2.3 M Iowa DOT Staff $ 5.5 M Consultant Engineering (design) $13.0 M $51.4 M
- 23. Iowa Cost Estimate Phase II – Central Section Beyond 2017, $ in YOE Main Span $118.2 M Approach Span $123.1 M Viaducts $128.9 M Mainline Roadway $ 40.2 M Bridge Demolition $ 15.3 M Maintenance of Existing Bridges $ 3.5 M Lighting, Signing, Landscaping, ITS $ 23.5 M Consultant Engineering (Constr.) $ 40.9 M Iowa DOT Staff $ 1.0 M $494.6 M
- 24. Illinois Cost Estimate Phase II – Central Section Beyond 2017, $ in YOE Main Span $118.2 M Approach Span $123.1 M Viaducts & Mainline Roadway $356.1 M Bridge Demolition $ 17.2 M Lighting, Landscaping, ITS $ 10.1 M Consultant Engineering (Constr.) $ 40.9 M $665.6 M
- 25. Central Section Cost Estimate YOE IOWA ILLINOIS $494.6 M $665.6 M
- 26. Iowa Cost Estimate Totals • Completed Work $ 44.8 M • Phase I $ 51.4 M • Phase II $494.6 M • Phase III (North Section) $202.5 M Total Cost $793.3 M
- 27. 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
- 28. Corridor Federal Funding • Earmarks $74.6 Million • Unobligated Amount $ 7.2 Million
- 29. Questions?
Notas do Editor
- 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.