This P3 project involved development of managed lanes along I-495 and I-270 located in Montgomery and Prince George’s Counties, Maryland and Fairfax County, Virginia. The preferred alternative included addition of two-lane high occupancy toll lanes in each direction from George Washington Memorial Parkway interchange to I-270 along I-495 and from I-495 to I-370 interchange along I-270. The project concept included the addition of 42 new lane-miles of highway and reconstruction/conversion of 148 lane-miles of existing highway; full replacement of the American Legion Bridge over the Potomac River; reconstruction of 14 interchanges; reconstruction of 33 bridges; retaining walls; stormwater management and utility conflicts/relocations.
CES performed multiple tasks during the predevelopment phase including technical specifications, utility relocation design support, cost estimating, and developing the overall Quality and Environmental Management System.
Cost Estimating:
CES developed a detailed independent construction cost estimate based on conceptual-level plans including design, construction and contingencies, quality assurance and quality control costs, estimated allowances, profit margin, and escalation costs.
Quality Reviews:
CES performed independent quality reviews of the Section Developer’s quality management system and associated design and construction quality management plan, and reviewed deliverables to confirm compliance with the requirements of the executed Phase P3 agreement.
Utility Management:
CES developed a comprehensive utility work plan, utility relocation concepts and master utility matrix which encompassed 160 conflicting utility lines including nearly 6,300 LF of water lines; 10,000 LF of sewer lines; 2,000 LF of gas lines; 18,000 LF of electric transmission and distribution lines; and more than 75,000 LF of fiber optic and other communications lines. In addition, CES conducted an independent review of the design-builder’s proposed utility adjustment plan, which involved design review, risk analysis, and cost estimating for wet and dry utilities.