1. 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

2. Project Location Map
Base Map Source: Google Maps

3. 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

4. Project Overview - Aerial Plan

5. 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

6. 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
Refined Analysis Method
October 2010 start – 2.5 years

7. Project Overview - Design-Build Process
TECHNICAL PROPOSAL SCORING
Bridge Points
Environmental Management Points
Maintenance of Traffic Points
Public Communications Points
Schedule Points
October 2010 start – 2.5 years

8. Project Overview - Design-Build Process
TECHNICAL PROPOSAL SCORING
Bridge Points
Durability/Quality of Bridge No Points
Inspection/Maintenance Points
Geotechnical Points
Erection of Bridge No Points
Demolition of Bridge No Points
October 2010 start – 2.5 years

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

10. 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

11. 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

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

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

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

15. 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

16. 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

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

18. Innovation – Develop Alternatives
October 2010 start – 2.5 years

19. Innovation – Develop Alternatives
October 2010 start – 2.5 years

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

21. Innovative Winning Alternative
Project Architect: Bradley Touchstone, Touchstone Architecture

22. Visual Quality Process & Color Selection

23. Aesthetic Lighting
Lighting Design: Illumination Arts

24. 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

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

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

27. Innovative Features - Floor System Redundancy

28. Innovative Features - Erection

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

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

31. Innovative Features - Erection
Build Low On Land

32. Erection
Move onto Barges Using SPMT’s

33. Innovative Features - Erection
Move onto Barges Using SPMT’s

34. Innovative Features - Erection
Float

35. Innovative Features - Erection
Float

36. Innovative Features - Erection
Skid

37. Innovative Features - Erection
Skid

38. Innovative Features - Erection
Skid

39. Innovative Features - Erection
Lift

40. Innovative Features - Erection
Lift

41. Innovative Features - Erection
Lockoff

42. Innovative Features - Erection
Get Some Sleep

43. Other Innovative Features
Column Supported Embankment
Long Span Precast Concrete Beams

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

45. 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

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

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

48. Other Innovative Features
LONG SPAN PRECAST BEAMS

49. 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

50. Thank You