I-90 Mississippi River Bridge & Interchange Project Presentation - - PowerPoint PPT Presentation

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I-90 Mississippi River Bridge & Interchange Project Presentation Outline I. Background: Context & Need for Project II. Preferred Alternative Overview III. Project Development IV. Project Management Tools & Innovation V.

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I-90 Mississippi River Bridge & Interchange Project

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Presentation Outline

I. Background: Context & Need for Project II. Preferred Alternative Overview III. Project Development IV. Project Management Tools & Innovation V. Questions & Answers

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Location: Interstate 90 crossing Mississippi. River near Dresbach, Minn.

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Need for Project – Key Issues:

Structural
Existing deck geometry is deficient
Fatigue Cracking in plate girders
Additional components in poor condition
Non-redundant design
No “back-up” for member failure
Effect of Ch. 152 Legislation (Mn 2008)

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Need for Project – Key Issues (cont.)

Capacity
WB I-90 to SB 61 movement
Traffic volumes heavy during PM commute
Excessive backups onto I90 off-ramp
Safety – higher than average crash rates
I90 Mainline Curve
NB 61 – EB90 On-ramp

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Issues Map

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Project Requirements :

Provide free-flow movements between I-90 and US 14/61
Maintain I-90 WB access to/from Rest Area
Meet 70 mph design speed on I-90
Provide new river bridge with 100-year design life & structural redundancy

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Additional Priorities:

Minimize long-term maintenance costs of river bridge
Allow for future Rest Area reconstruction
Minimize Environmental Impacts

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Bridge Aesthetics

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Project Elements:

9 Bridges total:
2 Concrete Box Girder River Spans
2 curved steel bridges on I-90
2 curved steel bridges @ interchange ramps
2 concrete spans to/from Rest Area
1 steel pedestrian bridge

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Project elements (cont.)

Realignment of I-90 Mainline
70 mph design
Interchange modifications
Addition of “fly-under”
Added movements from Rest Area

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Project elements (cont.)

15,000 lf. + retaining wall construction
Unique tiered wall systems
Storm sewer and Ponds
Rest Area reconstruction NOT included in

project.

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Project Development

Process Overview
Preliminary Design
Final Design

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Project Management - Key Challenges

Early identification of

– Current and future infrastructure needs – Environmental Constraints – Engineering Constraints – Community Needs

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Project Development – Key Challenges

Involvement of many participants & stakeholders
Decision-making (process, roles, and authority)
Consistent communications and documentation

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Key stakeholders- regulatory

Federal Highway Administration
Wisconsin Department of Transportation
Wisconsin Department of Natural Resources
U.S. Fish & Wildlife Service
U.S. Coast Guard
U.S. Army Corps of Engineers
Mn Department of Natural Resources
Mn Pollution Control Agency

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Key stakeholders - advisory

La Crosse Area Planning Commission
City of Onalaska
City of La Crosse
City of La Crescent
La Crosse Area Convention & Visitor Bureau
Winona County
La Crosse County

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MnDOT Stakeholders

Bridge Office
Rest Area/Site Development
Bike & Pedestrian Facilities
Geometric Design Services Unit
Investment Management
Land Management

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Project Development Committees

Project Advisory Committee (PAC)
Technical Advisory Committee (TAC)

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Project Status:

Environmental Document

Approval Dec. 2010

Final Design Initiating Nov.

2010

100% Plan turn-in by late

Oct., 2011

< 12 months for Final Plan Set

delivery !!

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Project Development –Challenges Ahead

1. Aggressive Schedule
2. Complex Design & Constructability issues
3. Potential for unknowns to develop
How Best to manage/mitigate challenges?

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Challenge 1: Schedule

Pace of delivery requires large team
Final Design segmented into 2 portions
River Bridge
Interchange and approach roadways
Final Design plan production outsourced
Approaches/Interchange: SRF, Inc.
River Span: TBD

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Challenge 1: Schedule Project Management Tools to be incorporated:

Use of Oracle/Primavera P6 CPM
Task Management
Activities are cost & resource loaded
Frequent Plan Review Meetings
Bi-weekly OTS meetings
Video-conferencing as needed
Document Management System

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Challenge 2: Complex Constructability & Design Issues:

Independent design for:
River Span Bridge
Curved-steel girder approach bridges
Constructability Reviews
Included in Design Quality Reviews
Contract review one-on-ones

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Challenge 3: Potential for unknown issues to develop:

Conduct Risk Assessment Workshop shortly after

Final Design is initiated

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Opportunities for Innovation

Performance-Based specifications
Maintenance of Traffic During Construction
Alternative Technical Concepts
Alternate retaining wall types

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Construction Phase: Bid Letting: February, 2012 Estimated Construction Cost: $164,000,000

70% Mn
30% WI
Construction Begins: Spring 2012
Construction Ends: Spring 2015 (anticipated)

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Questions?

Jai Kalsy, P.E., Project Manager Minnesota Department of Transportation 2900 48th Street NW Rochester, MN 55901 E-mail: jai.kalsy@state.mn.us