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Alternate Technical Concepts
AASHTO Subcommittee on DesignAASHTO Subcommittee on Design
July 28, 2010July 28, 2010
Columbia, S.C.Columbia, S.C.
KATHY HARVEYKATHY HARVEYState Design EngineerState Design EngineerMissouri Department of TransportationMissouri Department of Transportation
Project Development Process – New and Improved!
ATC WHY? – Best Value for Every $
Dwindling financial resources
Many ways to accomplish goals
49 other DOTs –
municipalities - FHWA
Contractor’s experience
Project Development Process – New and Improved!
ATC WHY?
MoDOT + Industry = 1 Team = Best Value
D/B job experience Encourage $ Savings Contract administration
Contractor risk VE vs. ATC
Project Development Process – New and Improved!
ATCs … are proposed changes to agency-supplied
basic configurations, project scope, design or construction criteria.
provide a solution that is equal or better to the requirements in the RFP.
are similar to value engineering, but are made as a part of the proposal before contract award.
provide flexibility to the proposers in order to enhance innovation and achieve efficiency.
Project Development Process – New and Improved!
ATC WHAT? - Legality
“ … likelihood of a protest reduced because of the reluctance of the courts to overturn agency decisions regarding advantages of one proposal over another, unless it is apparent that the decision was arbitrary or capricious, or agency failed to follow its own procurement practices.”
-- NCHRP 561 p S-9
Project Development Process – New and Improved!
ATC WHAT? – Different than D-B
Extension of design process - VE
Contractor is VE partner
Evaluate design effort vs. benefit
Design is funded as preliminary engineering
Project Development Process – New and Improved!
ATC How? – Where we started
Rock – the deal maker Profiles – can we roll? Medians – width or protection? Removals – if it ain’t broke don’t fix it Retaining Walls – CIP vs. MSE vs.
elimination Materials – optional if we can Traffic Control
Project Development Process – New and Improved!
ATC How? – Recent additions
Bridge Designs Interchange Configurations New use for what’s already there
Bottom Line – VE up front – Competitively Bid
Project Development Process – New and Improved!
ATC HOW? – Grading and Drainage
4:1
Rock at 2:1
PIPE
Project Development Process – New and Improved!
ATC HOW? – Pavement
4” Aggregate Base
Pavement 10” PCCP/13.5” AC
Project Development Process – New and Improved!
ATC HOW? – Pavement
Thick Rock Base
Pavement 8.5” PCCP/9.5” AC
Project Development Process – New and Improved!
ATC HOW? – Bridges
Concrete Box vs. Arch Structures
Steel Girder vs. Concrete Girder
Box Girder vs. NU Girder
Project Development Process – New and Improved!
ATC HOW? - General
Currently Job Special Provision May include sketches Pre-approved design changes
Project Development Process – New and Improved!
ATC HOW? – Pay Items
Plan Quantity of Initial Design
Lump Sum Sections
Lump Sum Savings
Change Order
Change to revised quantity
New plans for ATC effects
Project Development Process – New and Improved!
ATC HOW? - Pre-Approved
Timelines – submittal & approval
Technical Parameters
Detailed Submittal Process
Evaluation Project Team review Confidential Pass/Fail
Project Development Process – New and Improved!
ATC How? – Design
Base set of plans always provided
MoDOT/Consultant re-design
Collaborative Plan Development
Re-design completion after award
Evolving Process
Project Development Process – New and Improved!
ATC Challenges? – Design
Design effort for ATC submittal
Who leads ATC re-design
No cost change order
VE of ATC’s
Contractor incentive
ATC team w/AGC
Project Development Process – New and Improved!
ATC Future? – Development
MoDOT
FWHA
Contractors
Suppliers
Consultant
ATCs and VECPs
Project Development Process – New and Improved!
ATC Example – One that worked
Route H bridge over I-44, Springfield
Reduced 4-span bridge over I-44 to 2- span with use of MSE walls
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