On October 11, 2013, substantial completion was granted on the $232 million Tres Rios Wastewater Reclamation Facility in Tucson, Ariz. Substantial completion, reached eight days ahead of schedule, was officially announced during the projects Executive Committee Meeting held on October 17. This milestone follows the start up of the West Process Train in April of this year.
MWH has been working as the construction manager-at-risk (CM-at-Risk) on the renovation and expansion of the Tres Rios Water Reclamation Facility since 2009. The original facility began operation in 1977 at 25 mgd, and was subsequently upgraded to 37.5 mgd in 2006. The new Tres Rios Wastewater Reclamation Facility includes four new 1,000 hp blowers, a new 14 million gallon bioreactor basin, four new secondary clarifiers, a new pump station with a digested sludge, WAS and recycle storage tanks, a new WAS thickening facility with three new gravity belt thickeners (GBT), and new odor control equipment, which is fully automated.
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The MWH project team has done an exceptional job guiding the project through design changes and unforeseen weather conditions. Project Manager Duane Frerker, with Project Manager Derek Albert, Site Construction Manager Charlie Randolph, Jr. and M.E.P. Manager Dan Shreve were key in managing the extensive collaboration between MWH, the plant’s operation staff, designer and the owner’s project manager to reach substantial completion ahead of schedule.
The MWH commission and startup team lead by Jeff Haasch and Stephen Baker worked their way through the plant to bring the various facility systems on line, including grit classifiers, cyclone separators, grit washers mechanically cleaned bar screens in the headwork’s, two additional centrifuges and a cake load out facility consisting of three 110 ton capacity cake bins, and LV switchgear throughout the plant.
Along with serving as the CM-at-Risk, the team also self-performed more than $45 million of work at the facility. Upon final completion in January 2014, MWH will have successfully provided the infrastructure and backbone for the new 50 mgd facility. MWH is also completing a $7 million Central Plant that will be turned over in December and several building remodels that will be complete in March of 2014.
