Managing a Design-Build vs. Bid-Build Project

Transcription

1 Managing a Design-Build vs. Bid-Build Project January 30, 2018 Claude Ipock, P.E. SCDOT State Construction Engineer Jay Thompson, P.E. SCDOT State Pavement Design Engineer

2 Contract Documents Bonds Performance Payment Warranty (3 years) Insurance Workers Comp General Liability Automobile Liability Umbrella Liability Errors & Omissions Builders Risk Escrow Documentation

3 Contract Administration District Personnel Administers the Contract RCE office or Project RCE is the point of contact both during design & construction (cc on all correspondence) Headquarters plays a support role Design Submittal & Review Construction

4 All Design-Build Projects FHWA PODI Stewardship Agreement Other Projects innovative contract procedures Formal Partnering Open Communication Coordination Design & Construction

5 Lump Sum Contract Schedule of Values Basis for cost loading the CPM The CPM Schedule Sufficient detail to track the project for monetary and quantitative purposes Progress estimates are based on the percent of work complete

6 Shift in Risk SCDOT s Risk is a Well Defined Scope Change Orders Added/Reduced Scope Coordination Railroad Utility Right of way Permitting

7 Design-Build Contracts -Cost Includes: and any and all other services that may be necessary for completion of the Project.

8 Quality Assurance Concrete, Earthwork, and Foundations Quality Assurance (QA) is an Umbrella Term Quality Control-Contractor Quality Acceptance-SCDOT Independent Assurance (SCDOT OMAR)

9 Quality Assurance Asphalt SC-M-400 Quality Assurance (QA) is still an Umbrella Term Quality Control-Contractor Quality Acceptance-Contractor Verification Testing-SCDOT Independent Assurance-SCDOT

10 Quantities Overruns/underruns Rates/Thickness Meet the minimums/tolerances Grades- Superelevation Fixed points-structures/barrier Full depth patching Special Provision Price Quantity

11 Specifications Asphalt Mixture Quality Acceptance SC-M-400 Special Provision to establish unit cost $65.00 per ton Rideability SC-M-403 Special Provision to establish unit cost Final Riding Course OGFC-$75.00 per ton

12 Adjustments Fuel Adjustments Special Provision Historically None AC Binder Adjustments Special Provision Base Bituminous Material Index Determined on the first calendar day of the month in which the cost proposals are due

13 Maintenance of Traffic

14 Maintenance of Traffic

15 Maintenance of Traffic

16 Maintenance of Traffic

17 Upcoming Projects I-85 Widening-Cherokee County Bid Opening late February SC 277 NB Bridge-Richland County Short List Early February I-26 Widening-Richland, Lexington & Newberry Counties Short list Spring 2018 Carolina Crossroads RFQ late 2018

18 Pavement Design in General More than Just Structure Cost Constructability Performance

19 Pavement Design in General Bid Build Staging and traffic control is prescribed Identify risk and mitigate during design Less risk on contractor Design Build Options or minimum requirements on mainline Various approaches on shoulders and non-interstate routes More risk on contractor

20 So What's the Difference? Risk Contractor - Immediate and Warranty Period SCDOT - Future Risk of Performance

21 What Makes the Best Pavement? Design Build Team has More Control over Staging Traffic Control / MOT Profile Changes Widening (to inside or outside) Duration of Construction Knowledge of Equipment, Means and Methods All of these things can effect what would be the BEST pavement design.

22 Main Areas of Risk Rehabilitation of Existing Alignment

23 Main Areas of Risk Relatively consistent distresses Isolated fatigue cracking Outside lane significant deterioration

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26 Main Areas of Risk Rehabilitation and Temporary Alignments Using Shoulders Variable and/or deficient structure FWD paints the background Engineering judgment and investigation completes the picture

27 Main Areas of Risk Rehabilitation and Temporary Alignments Using Shoulders Accuracy of traffic and reality of alignment shift durations Signing for no trucks helps but doesn t eliminate loads reliably

28 HMA Shoulder PCC Mainline

29 HMA Shoulder HMA Mainline

30 HMA Shoulder HMA Mainline

31 HMA Shoulder HMA Mainline

32 Crossovers and New Location Temporary Alignments Begins with a Good Foundation Medians often wet & unstable Drainage problems may persist during use of temporary alignment Prime locations for chemical stabilization and efficient designs using semi-rigid pavements

33 Future of Pavement Design and Risk in Design Build

34 Future of Pavement Design and Risk in Design Build

35 Future of Pavement Design and Risk in Design Build

36 Future of Pavement Design and Risk in Design Build

37 V A L U E

38 QUESTIONS

39 Thank You January 30, 2018 Claude Ipock, P.E. SCDOT State Construction Engineer Jay Thompson, P.E. SCDOT State Pavement Design Engineer