Marston Treatment Plant, Filter Plant No. 2 Upgrade

Denver, Colorado


City and County of Denver


Black & Veatch Corporation

Contract Amount:

Award Contract: $11,959,534

Contract Type:

Construction Manager at Risk

Project Summary:

In August 2008, Moltz Construction was awarded a consulting contract by Denver Water to assist with the design and constructability of the Marston Filter Plant No. 2 upgrades project. The Marston Water Treatment Plant was built in the 1920’s. Filter Plant No. 2 was constructed in 1967, remaining mostly unmodified to this day. The upgrade to Plant No. 2 adds 24 million gallons per day to the plant production, along with updating numerous mechanical and electrical systems.

Initially, the work consisted of putting together estimates based on 60% and 90% drawings for replacing baffle walls in the disinfection contact basin, replacing steel pipe and valves in the Filter Plant No. 2 pipe gallery, removing and replacing the filter underdrains and media for eight dual bay filters, and installing a new engine generator and transfer switch for the headworks. Additionally, Moltz performed Owner requested change orders to remove asbestos and lead, as well as work on other parts of the plant facility.

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