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Design Build Success Story in the Making

Public Private Partnership (PPEA) allows County to reduce capital cost and secure financing for WWTP Enhanced Nutrient Removal Upgrade and Expansion

Design Build in the State of VA via the Public Private Partnership (PPEA) is an alternate project delivery method that allows owners to truly reduce cost and save time on their wastewater treatment and other related public works projects while also generating competitive and innovative solutions. In contrast to a conventional Design-Bid-Build process, Design Build delivery is an integrated approach that will offer substantial value to the Owner in terms of guaranteed/lump sum price, no contractor change orders, overall reduced risk, reduced cost, streamlined process, and an accelerated design and construction schedule for the proposed project. The Design Build approach allows for sole source responsibility through the design builder and provides a collaborative working environment for the contractor and engineer as well as the Owner which promotes the team concept.

After the 1.5 MGD ENR WWTP Upgrade and Expansion was tabled for several years due to the estimated high cost and denied by Federal Stimulus Funding the County decided to reach out to the Private sector via the PPEA approach via Design Build in an effort to reduce capital costs, secure financing and jump start the project. After two competing Unsolicited PPEA proposals were received and evaluated the County chose a proposal that offered a lump sum price of $16.45 million which was approximately $10 + million dollars under the previous capital cost estimate based on a 80% design by others. The design selection was a 1.5 MGD ENR WWTP Upgrade/Expansion utilizing New 5 Stage Bardenpho Reactor System with Clarification, Tertiary Filtration and UV disinfection along with New Equalization, Headworks, Septage Receiving and an 8,000 sqft Operations Building. The existing oxidation ditch system is being retrofitted as the sludge digestion and holding system. Within 6 months from notice to proceed design was complete, all permits were in hand and concrete was being poured.