Moving ForwardMAASTO Conference
July 17, 2013
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Welcome/Introductions
David Solberg - WisDOT, Project Manager
Jon Chiglo - MnDOT, Project Director
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Where is Stillwater, Minn.?
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Project Area
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
MinnesotaWisconsin
Project Overview
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Project Need
• Traffic congestion• Mobility• Safety• Delays from Lift Bridge
operation• Physical restrictions• Needs of pedestrians• Lift Bridge condition
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Act of Congress126 STAT. 268 PUBLIC LAW 112–100—MAR. 14, 2012
Public Law 112–100 112th Congress
An Act To authorize the St. Croix River Crossing Project with appropriate mitigation measures to promote river values.
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Protected Resources
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
• 50+ permits/approvals
• Almost 30 different agencies/entities
Extradosed Bridge Type
• Composite of Cable Stay and Segmental Box Girder bridge types.
• Load shared by Beam Action (i.e. deck stiffness) and Cables to Towers
• 40+ Extradosed Bridges in Japan plus more in France, Korea, and Canada.
• Pearl Harbor Bridge, CT (1st U.S. Extradosed Bridge)
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Extradosed Bridge Type
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Organic Style
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
St. Croix Crossing Main Bridge
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Multi-State Coordination• Design Review
– Over the shoulder reviews
• Development of Specifications
• Risk Management
• Split Project Management
• Wisconsin Approach
• Minnesota Approach and Bridge
• Partnering meetings
• Public Outreach in Wisconsin and Minnesota
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Extradosed Bridge Contract
• June, 2012 - Selected HDR/B&T to Design Bridge
• July, 2012 - Selected HNTB as Peer Reviewer
• Completed Design Optimization Study
• Span lengths
• Reduce water piers
• Implement foundation results of load test
• Identify most effective method to construct bridge
• CIP vs. Precast segmental
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Design Refinement Analysis• Lengthened spans from 475’ to 600’
• Reduced number of water piers from 6 to 5
• Reduced number of tower piers from 7 to 5
• Foundations Load Test
• 20% reduction in number of shafts
• 20% reduction in shaft area
• 50% reduction in rock socket length
• Identify method to construct bridge
• Less impact on shore (reduce footprint)
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Specialty Studies and Reports
• Design and Load Rating Criteria
• Bridge Maintenance and Inspection Manual
• Quality Management Plan
• Bridge Fixity Study Report
• Wind Engineering Study Report
• Redundancy Analysis Report
– Cable stay system; struts between box girders
• Bridge Security
Bridge Data
• Total bridge length 5060 feet
• Out-to-out width on deck
• 98 feet on main spans; 43 feet on approaches
• Precast Segmental Areas
• 18 feet deep on main span (650 segments)
• 10 to 14 feet deep on approach (375 segments)
• Cast-in-place Areas
• Gore area, 14 to 18 feet deep
• On Ramp, 10 to 14 feet deep
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Typical Extradosed Span
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Double Box Girder Size
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Early Foundations Contract
• Separate contract for all pier foundations in river
– 10 pier towers, 4 drilled shafts per tower
• Risk management strategy
• Let in March of 2013
• Completion by July 1, 2014
– Three foundations must be complete by end of 2013
– Incentive to complete all piers by January of 2014
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Superstructure Contract
• Plans and Specifications Ad Date of July 19, 2013.
• Project Letting of October 11, 2013.
• Pre-qualification of Key Contractor Personnel.
• Provide CPM schedule and 4D model to bidders.
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Schedule Management
• CPM schedule for design and construction – Cost and resource loaded schedules
• Design completed in 12 months
• Design and Construction Quality Management
• Co-Housed with HDR– Expedite decisions, issue resolutions
– Commitment to schedule
• Fourth dimension of 4D model
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
4D Model
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Cost Management• Lump Sum Design Contract
– Payment made on earned revenue
• Active Risk Management of Contract
• Independent Cost Estimator
• Design Refinement Analysis
• Constructability Reviews
• Locked Incentive (no excuse clause)
• Design and Construction Quality Management
• Early contracts (Foundations, Piling, Mn Approach)
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin
Keys to Continued Project Success
• Communication and Public Outreach
• Aggressive Cost/Schedule Management
• Proactive Risk Management
• Partnering
Connecting Oak Park Heights and Stillwater, Minnesota with Houlton, Wisconsin
Successful Completion
Connecting Oak Park Heights & Stillwater, Minnesota with Houlton, Wisconsin