This multi-phase Construction Manager At-Risk project is in its final phase, construction of a new water treatment facility.  The work involves construction of a new 24 million gallons per day (mgd) plant utilizing low pressure membrane vacuum type filtration technology.

An earlier phase of work included construction of a new 3 mgd well on the existing treatment facility site; upgrade of an existing 1 mgd well to 3 mgd; installation of iron, manganese, and odor treatment package facility; installation of 3 mgd variable speed booster pump at the existing Avenue 9E Water Treatment Plant High Service Booster Pump Station.  Associated mechanical, electrical and instrumentation, and reconstruction of existing improvements affected by the work were also included.

The most recently completed phase of work involved construction of numerous related improvements including:

• Two new 2.5 million gallon capacity steel potable water storage tanks including an FRP interior baffle system
• New high service pump and variable frequency drive
• New well and pump
• 54”/48” underground piping
• Chemical feed system additions and modifications
• Modifications/additions to plant electrical and Supervisor Control and Data Acquisition (SCADA) systems
• Tie-in work completed so as to not interrupt City operations at any time
• New 1250kW emergency generator and transfer switch

Interim Phase I work was the Arizona Water Pollution Control Association’s Small Water Project of the Year award winner in 2005.

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