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Occoquan River Crossing Project

Webpage updated 11/6/23

Service Authority Project Manager 

Sandra M. Hernando Villanueva

Project Description

Fairfax Water will install two parallel 42-inch water mains underneath the Occoquan River and make other improvements in order to increase drinking water transmission capacity, maintain system reliability and enhance availability for existing and future Service Authority customers in eastern Prince William County. The project is a collaboration among three providers of drinking water: Fairfax Water, the Service Authority and Virginia American Water. The project also entails connecting Fairfax Water’s Griffith Water Treatment Plant to the new 42-inch water mains at the Occoquan River, installing a new water pump at the Griffith Plant and establishing interconnections between existing water mains at Tanyard Hill Road and at the Horner Road Commuter Parking Lot in Prince William County.

Current Project Activities

The portion of Tanyard Hill Road has been reopened as of November 10, 2023. Fairfax Water’s project contractor will install the final striping on or about November 17, 2023.