I-90 Mississippi River Bridge & Interchange Project

Transcription

1 I-90 Mississippi River Bridge & Interchange Project

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

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

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6 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)

7 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

8 Issues Map

9 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

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

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12 Bridge Aesthetics

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

18 Project elements (cont.) Realignment of I-90 Mainline 70 mph design Interchange modifications Addition of fly-under Added movements from Rest Area

19 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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22 Project Development Process Overview Preliminary Design Final Design

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24 Project Management - Key Challenges Early identification of Current and future infrastructure needs Environmental Constraints Engineering Constraints Community Needs

25 Project Development Key Challenges Involvement of many participants & stakeholders Decision-making (process, roles, and authority) Consistent communications and documentation

26 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

27 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

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

29 Project Development Committees Project Advisory Committee (PAC) Technical Advisory Committee (TAC)

30 Project Status: Environmental Document Approval Dec Final Design Initiating Nov % Plan turn-in by late Oct., 2011 < 12 months for Final Plan Set delivery!!

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

32 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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34 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

35 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

36 Challenge 3: Potential for unknown issues to develop: Conduct Risk Assessment Workshop shortly after Final Design is initiated

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

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43 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)

44 Questions? Jai Kalsy, P.E., Project Manager Minnesota Department of Transportation th Street NW Rochester, MN