Griith Raw Water Facilities Client: Fairfax Water Location: Fairfax County, VA Hazen and Sawyer provided planning, design, and construction administration services to construct the Frederick P. Gri th Jr. Raw Water Pump Station and associated intake and conveyance tunnels to deliver raw water to the Fairfax Water’s new 120-mgd Frederick P. Gri th Jr. Water Treatment Plant. The pump station is furnished with six horizontal split-case pumps ranging in size from 700 horsepower (HP) to 1,750 HP to provide variable raw water delivery capability in increments of 10 mgd over a range of 40 to 120 mgd using constant- speed drives and no throttling, thus providing maximum exibility and ease in operation for meeting raw water demands.Vertical shaft and suction main. Suction main inspection. Mai

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