IQ Spring 2012: The Conference Issue - (Page 17)

the h.L. Mooney Water reclamation facility photo courtesy of pizzagelli construction company obstacles were addressed. The DAC was replaced with a global Supervisory Control and Data Acquisition SCADA system that was integrated with new and existing equipment. The designbuilder, the subcontractors and PWCSA staff tackled these challenges proficiently through collaboration and cooperation—and with no interruption of plant operation. The deadline for completing the project was Dec. 31, 2010. However, the Pizzagalli and CDM team reached substantial completion on Sept. 30, 2010—three months ahead of schedule—and the Virginia DEQ issued a certificate for PWCSA to operate the facility under the new requirements. Not only was the project completed within budget, cost efficiencies allowed the team to include extra scope with some funds returned to PWCSA. The teamwork on the project, early completion and cost efficiencies led to the jury for the 2011 National DesignBuild Award competition honoring the H.L. Mooney WRF project with a Design-Build Excellence Award in the Water/Wastewater category.—T.R. / sNapshot project Name: H.L. Mooney WRF Expansion and upgrade, Stage 2, Phase 1 owner: Prince William County Service Authority design-Builder and general contractor: Pizzagalli Construction Company architect/engineer: CDM specialty consultant: RDA (Rinker Design Associates) specialty contractors: Heyward Baker American Infrastructure M.C. Dean, Inc. Prince William County’s largest capital-improvement project was completed three months early thanks to design-build. IN Late 2005 the Prince William County Service Authority (PWCSA) was facing its largest capital-improvement project ever: expanding and upgrading the H.L. Mooney Water Reclamation Facility. In addition to being the county’s largest project ever, it was the largest designbuild project ever built in Virginia. While the county’s population and water requirements were growing, a major impetus for the project was the Chesapeake Bay Commission Initiatives, which mandated stringent standards for nutrient removal, more so than the Virginia Department of Environmental Quality had. In addition, the upgraded facility had to be online by the end of 2010. With these requirements in mind and expectation of continued growth, PWCSA also wanted to increase the plant’s capability from 18 to 24 MGD. In early 2006 PWCSA sent out a request for proposal for design and construction under Virginia’s Public-Private Educational Facilities Infrastructure Act guidelines using design-build. PWCSA had never used design-build before, but chose to use it for the H.L. Mooney WRF because of the single point of accountability, the ability to select the team based on its qualifications, and the expectation of efficiency and cost effectiveness. PWCSA selected Pizzagalli Construction Company as its design-builder. As is often the case, the designbuild team encountered obstacles— unsuitable soil conditions and other environmental factors, maintaining plant operations during the entire construction process and the need for an updated data acquisition and control (DAC) system. As with all successful projects, the team overcame them and went further. Soils were amended. Environmental dbia.org spring//2012 17 http://www.dbia.org

Table of Contents for the Digital Edition of IQ Spring 2012: The Conference Issue

IQ Spring 2012: The Conference Issue

IQ Spring 2012: The Conference Issue - (Page C1)
IQ Spring 2012: The Conference Issue - (Page C2)
IQ Spring 2012: The Conference Issue - (Page 1)
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http://staging.nxtbook.com/ygsreprints/DBIA/g32384_dbia_spring2013
http://staging.nxtbook.com/ygsreprints/DBIA/g30201_dbia_winter2012
http://staging.nxtbook.com/ygsreprints/DBIA/g27498_dbia_iq_fall2012
http://staging.nxtbook.com/ygsreprints/DBIA/g27263_dbia_iq_summer2012
http://staging.nxtbook.com/ygsreprints/DBIA/g27412dbia_iq_spr12
http://staging.nxtbook.com/ygsreprints/DBIA/g24065_dbiaiqwinter11
http://staging.nxtbook.com/ygsreprints/DBIA/g21862_dbia_fall_11
http://staging.nxtbook.com/ygsreprints/DBIA/dbianxtbook_summer_11
http://staging.nxtbook.com/ygsreprints/DBIA/g18240_dbia_spring2011a
http://www.nxtbookMEDIA.com