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SEP-14 Alternative Contracting
Work Plan Special Experimental Project No. 14 (SEP-14)
The Colorado Department of Transportation (CDOT) submits this work plan for review and approval as Alternate Pavement Type Bidding (APTB) project under the provisions of Special Experimental Project-14 (SEP -14) for the use of innovative contracting practices. The Project in this work plan will consist of highway resurfacing. CDOT uses FHWA's Real Cost life cycle cost analysis (LCCA) probabilistic software to select the most cost effective pavement type. In this plan it is proposed to advertise this project with alternate pavement types having equal design life.
The proposed alternate pavement type bidding is being considered by CDOT to take advantage of the cost competitive market between flexible and rigid pavements.
With rising costs associated with paving materials and increasing demands on available highway funds there is a challenge to reduce costs, which is pressuring CDOT to actively pursue methods that have the potential to enhance the use of tax dollars. Other states that have used APTB have generally experienced increased competition and a reduction in bid prices on projects where APTB has been utilized.
The scope of this project using this process will include construction of the pavement. The Department has chosen to alternatively bid a Standard Plain Jointed Doweled Portland Cement Concrete Pavement (PCCP) as the rigid option, with new Hot Mix Asphalt (HMA) over Cold in Place Recycling of the existing asphalt as the flexible option. The flexible option was designed using Darwin AASHTO 93. The ridged option is designed using the AASHTO Supplemental Guide. The traffic information was obtained from the Colorado Department of Transportation's Traffic Data website. ESALs were calculated based on a 30 year design for PCCP and a 20 year design for HMA.
The intent of this project is to replace the current failing roadway surface. Construction will comply with CDOT's Standard Specifications for Highway Construction, edition 2005 and current Supplemental Specifications and any special provisions. The pavement will be constructed using CDOT's Quality Control and Quality Acceptance (QC/QA) specifications.
Typical sections and tabulations sheets will be provided in the Plans for rigid and flexible pavements. The contractor will be obligated to construct either the rigid pavement section or the flexible pavement section shown on the plans according to the Standard Specifications.
CDOT will advertise and solicit bids for this project utilizing its normal bidding process. A pre-bid conference will be held. Prior to the bidding, CDOT will provide the Life Cycle Cost (LCC) adjustment factor value that will be added to the Contractors initial bid price. The LCC adjustment factor will be the difference in future major maintenance and rehabilitation actions between rigid and flexible pavements based on a standard equal life of 40 years. The LCC will be estimated using current costs for the future actions. Future action costs specific to the pavement type will be calculated using CDOT's standard process. The LCC adjustment factor will include a discount rate and will be presented as a present worth value. The successful bidder will be the contractor with the least cost sum of the initial bid cost plus the LCC adjustment factor provided by CDOT.
CDOT will prepare and submit an initial and final report on the project. The initial report will include the paving industries' reaction to the alternate bid type selection process. It will contain the individual bid items, quantity, and cost for the work as well as the life cycle actions and estimated costs. CDOT will prepare and submit a final report at the completion of the project. The evaluation will be prepared cooperatively by Colorado Contractors Association and CDOT Materials and Geotechnical Branch, with input from the CDOT Director of Project Development, and the Contractor as applicable. The final report will contain an overall evaluation of the process along with any suggestions and recommendations for improving the process.