Innovative Solutions for an Evolving Industry March 5, 2013 Vincent Gastoni, PE Delivering Major Minnesota Bridges Hastings Bridge Design Build Project Redundancy and Service Life MnDOT – ACEC/MN Annual Conference Leading Together- Innovative Solutions for an Evolving Industry

Project Location Map Base Map Source: Google Maps

Project Overview - Existing Bridge Highway 61 over Mississippi River Highest daily two-lane highway traffic volume in the state MnDOT Chapter 152 Bridge Project replaces 1950 steel arch truss Lowest 1% in the state for overall sufficiency

Project Overview - Aerial Plan

Project Overview - Design-Build Process Design-Build SOQ Issued: October 2009 Design Build Selection: June 2010 MnDOT identified two acceptable alternatives RFP allowed Alternative Technical Concepts (ATC’s) Design Build Team: October 2010 start – 2.5 years

Project Overview - Design-Build Process INNOVATIVE RFP FEATURES Alternative Technical Concepts (ATC’s) Allow innovation and flexibility Pre Approved Elements (PAE) Reduce risk and provide best value opportunities Redundancy Concepts for the Main Structure Segment Scour Analysis Method Bridge Fixity and Thermal Expansion of Bridge No. 19004 Refined Analysis Method October 2010 start – 2.5 years

Project Overview - Design-Build Process TECHNICAL PROPOSAL SCORING Bridge 34 Points Environmental Management 6 Points Maintenance of Traffic 5 Points Public Communications 2 Points Schedule 3 Points October 2010 start – 2.5 years

Project Overview - Design-Build Process TECHNICAL PROPOSAL SCORING Bridge 34 Points Durability/Quality of Bridge No. 19004 13 Points Inspection/Maintenance 9 Points Geotechnical 5 Points Erection of Bridge No. 19004 4 Points Demolition of Bridge No. 5895 3 Points October 2010 start – 2.5 years

Project Overview - Design-Build Process SCORING DRIVES INNOVATION Selection = Bid Price Technical Score October 2010 start – 2.5 years

Project Overview - Design-Build Process SCORING DRIVES INNOVATION Selection = Win Strategy= Bid Price Technical Score Minimize Bid Price Maximize Technical Score October 2010 start – 2.5 years

Project Overview - Design-Build Process SCORING DRIVES INNOVATION Selection = Win Strategy= Use innovative ATC’s & PAE’s to: Minimize Risks Optimize Design Solution Bid Price Technical Score Minimize Bid Price Maximize Technical Score October 2010 start – 2.5 years Need A Better Mouse Trap

Design-Build Process – Base Concepts MnDOT RFP Baseline Options October 2010 start – 2.5 years

Design-Build Process – Base Concepts MnDOT Cable Stayed Option October 2010 start – 2.5 years

Design-Build Process – Base Concepts MnDOT Arch Option October 2010 start – 2.5 years

Base Concept Evaluation Evaluate Base Designs Preliminary engineering analysis Cost estimating exercises Produce Comprehensive Evaluation Matrix Tool Material costs & risks Develop Alternative Designs October 2010 start – 2.5 years

Innovation – Develop Alternatives Evaluate Alternative Designs Prescriptive design/performance criteria Aesthetic requirements Technical scoring criteria Cost & schedule impacts Add to Comprehensive Evaluation Matrix Tool Develop Overall Best Value Technical Approach October 2010 start – 2.5 years

Innovation – Develop Alternatives Lunda/Ames-Parsons Alternatives October 2010 start – 2.5 years

Innovation – Develop Alternatives October 2010 start – 2.5 years

Innovation – Develop Alternatives October 2010 start – 2.5 years

Innovative Winning Alternative Successful Proposal-Free Standing Tied Arch $120M 545 ft. Main Span Project Architect: Bradley Touchstone, Touchstone Architecture

Innovative Winning Alternative Project Architect: Bradley Touchstone, Touchstone Architecture

Visual Quality Process & Color Selection

Aesthetic Lighting Lighting Design: Illumination Arts

Innovative Features - Concrete Tie Best value solution Higher level of redundancy Ease of inspection/maintenance More durable than steel box No shop assembly and fit-up issues Active tension control Durability/Quality – 13 points Inspection/Maintenance – 9 points 22% of technical score

Innovative Features - Concrete Knuckle Framed into pier and rib Improved durability/fit-up Post-tensioned anchorage Highly redundant

Innovative Features – Steel Box Arch Rib Simplified fabrication Best Value solution Aesthetically pleasing Improved maintenance

Innovative Features - Floor System Redundancy

Innovative Features - Erection

Innovative Features - Erection Build low TEMP BRACING ARCH RIB FLOOR SYSTEM TEMP TIE & FORMS TEMP LIFTING CONNECTION

Innovative Features - Erection Build Low On Land TEMP BRACING ARCH RIB FLOOR SYSTEM TEMP TIE & FORMS TEMP LIFTING CONNECTION

Innovative Features - Erection Build Low On Land

Erection Move onto Barges Using SPMT’s

Innovative Features - Erection Move onto Barges Using SPMT’s

Innovative Features - Erection Float

Innovative Features - Erection Float

Innovative Features - Erection Skid

Innovative Features - Erection Skid

Innovative Features - Erection Skid

Innovative Features - Erection Lift

Innovative Features - Erection Lift

Innovative Features - Erection Lockoff

Innovative Features - Erection Get Some Sleep

Other Innovative Features Column Supported Embankment Long Span Precast Concrete Beams

Other Innovative Features COLUMN SUPPORTED EMBANKMENT 4” over 25 years CSE -10’x10’ Pile Grid Conc. Caps Sand/Geogrid

Other Innovative Features LONG SPAN PRECAST BEAMS Precast Pretensioned Concrete Beams 5 Spans of 9-Girder Lines 173’-7” Long Span Longest Beam Overall length = 174’-3” Innovative beam design became the basis of MnDOT’s new MW Long Span Precast Concrete Beam Standards

Other Innovative Features LONG SPAN PRECAST BEAMS Photos: Joel Mich, Cretex

Other Innovative Features LONG SPAN PRECAST BEAMS Photos: Joel Mich, Cretex

Other Innovative Features LONG SPAN PRECAST BEAMS

Innovative RFP Process Best Value Approach Drives Innovation Summary Innovative RFP Process Best Value Approach Drives Innovation MnDOT Partnering in Innovation Continued Commitment to Innovation

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