P-193 Water Treatment Plant Replacement

The Marine Corps Air Station (MCAS) Cherry Point needed a new water treatment plant (WTP) to provide potable water and flight line fire suppression for its base. To improve production, distribution, and quality of water, Garney constructed a new reverse osmosis membrane WTP with a rated capacity of 6 million gallons per day (MGD) in addition to supporting plant facilities.

The project consisted of constructing a 25,000 square-foot two-story operations and treatment building with training facilities and a full laboratory. The facility is a concrete pile support structure with 325 piles with an average length of 65-feet each supporting a mat foundation cast-in-place concrete walls with a masonry veneer.

The raw water to the WTP was generated from surrounding wells. Five new wells were constructed as well as modifications and improvements to 20 existing wells. This raw water was conveyed to the WTP through a newly constructed 10,000-foot raw water transmission pipeline in conjunction with an existing underground pipe network. Upon entering the plant, water passed through booster pumps, strainers, and cartridge filters before entering the nano filters or the bypass filter. The water was then combined and processed through a degasifier prior to being chemically treated and stored on site before being distributed by the four new finished water pumps.

The facility provides potable water to over 43,000 MCAS Cherry Point military personnel and civilians.