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Agenda
- Project Overview
- Bridge Construction Process
- Project Challenges
- Project Successes
- Upcoming Project Activities
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Milton Madison Bridge: Construction Update Aaron L. Stover, PE, SE - - PowerPoint PPT Presentation
Milton Madison Bridge: Construction Update Aaron L. Stover, PE, SE - - PowerPoint PPT Presentation
2012 KYTC Partnering Conference September 11, 2012 Milton Madison Bridge: Construction Update Aaron L. Stover, PE, SE Michael Baker Jr., Inc. Agenda Project Overview Bridge Construction Process Project Challenges Project
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Markland Dam Project Site I-275 I-65 Cincinnati Louisville
Study Area
One of two Ohio River bridges between Cincinnati and Louisville
I-65 Bridge - 46 miles Markland Dam - 26 miles I-275 Bridge – 65 miles
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Project Overview
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Project Timeline
- June 2008 – Kickoff Environmental Process
- Fall 2009 – Proposed Superstructure Replacement
- February 2010 – TIGER Grant Funding Announced
- September 2010 – Contractor Announced (Walsh)
- January 2011 – Construction Began
- April 25-29th 2012 – First Bridge Closure
- June 25-29th – First Bridge Lift
- Sept 10th– Second Bridge Lift
- 2013 – New bridge Open to Traffic
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Project Purpose and Need
- KYTC Structurally Deficient List
- Weight Restriction
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Structurally Deficient Functionally Obsolete
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- Milton Approach re-construction
- STR 1 replace KY Approaches
- STR 2 Truss replacement
– Pier Strengthening and Scour Mitigation – Superstructure Replacement
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Milton, KY Madison, IN
- STR 3 – Replace IN Approaches
- STR 4 – Pedestrian Access to Park
No Right-of-Way required 1 2 3 4
Selected Alternative: Superstructure Replacement
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12’-0”
LANE
8’-0”
SHOULDER
5’-0” 12’-0”
LANE
8’-0”
SHOULDER 7
Typical Section
- Existing 20 ft curb to curb – Becomes 40 ft
- 5 ft pedestrian walkway
- 8 ft shoulders will accommodate bicyclists
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Selected Alternative
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Existing Bridge Proposed Bridge
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Bridge Construction Process
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Design – Build Letting Summary
- September 22, 2010
- Five Contractors submitted bids
- Formula for Effective Bid Price
- lowest effective bid wins
- [A + B – Adjustment]
- A = construction cost ($102-$127 million)
- B = closure days x $25,000/day. (365 days max)
- Adjustment = $3.75 million for early opening
(Sept 2012 or May 2013)
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Project Partners
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Construction Overview
- Strengthen existing piers
- Innovative construction process:
- Build a new truss on downstream piers while
the existing bridge remains open to traffic
- Remove old truss and slide the new truss
- nto the strengthened existing piers
- Shorten closure periods (approx 10 days)
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Step 1
- Pier strengthening and widening begins
- Detour approach ramps are built on Vaughn Dr and KY 36
- Existing bridge remains open to traffic
Construction Sequence
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Pier Strengthening
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Madison Temporary Access Ramp
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Courtesy Debbie Crawford
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Milton Temporary Access Ramp
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Courtesy Debbie Crawford
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Step 2
- Bridge closed to traffic for 5 days
- Approach ramps are connected to existing bridge
- Existing bridge reopens to traffic using approach ramps
- Pier strengthening work continues
Construction Sequence
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Madison Demolition
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Madison Demolition
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Closure – Started off with a bang…
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Madison Demolition
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Truss Erection on Barges
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Truss Assembly Yard
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Span 2 Nearing Completion
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Step 3
- Downstream bridge piers are constructed
- Truss Erected on Downstream Piers
Construction Sequence
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Temporary Towers - P3 & P4
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Sliding Girders
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Step 3
- Downstream bridge piers are constructed
- Truss Erected on Downstream Piers
Construction Sequence
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Span 2 Truss Float Out
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Span 2 Lift (Animation)
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Span 2
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Truss Float
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Truss Float
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Span 3 Lift – 9/10/12
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Jacking Platform
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Sidewalk Superintendents
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Span 3 Float (Animation)
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Span 3 Lift (Animation)
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Step 4
- Downstream bridge is connected to US 421
- Traffic is rerouted onto downstream bridge
Construction Sequence
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Step 5 Existing bridge is demolished
- Detour approach ramps are removed
- Pier strengthening and widening is completed
Construction Sequence
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Step 6
- bridge closed for 5 days
- new truss superstructure is moved from
downstream piers to its permanent place
- New Milton-Madison Bridge opens to traffic
- Downstream piers are removed
Construction Sequence Bridge Slide
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48 Pulling Strands Bearing Pulling Bracket
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Project Challenges
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8 flood events 131 Flood Days 20 days/yr allowed for in contract Record Rainfall
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Spring 2011 Flooding
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Project Successes
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Temporary Ramps Completed
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Lifts of Span 2 and Span 3
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Peregrine Falcons Hatched
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Next Steps?
Stick Build out the end spans Complete the Approach Spans Cast the Deck Switch Traffic to new Bridge
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