Occoquan River Crossing Project

The Occoquan River Crossing Project is a collaboration between three providers of drinking water: Fairfax Water, Prince William Water, and Virginia American Water. This project consists of designing and constructing two new 42-inch parallel water mains that will cross under the Occoquan River inside a 400-foot-long tunnel and connect to existing water mains on the Prince William County side of the river. In addition, a new water main will be installed to connect Fairfax Water’s Griffith Water Treatment Plant (located in Fairfax County) with the 42-inch water mains at the Occoquan River.

This project also includes the installation of a new drinking water pump at the Griffith Plant and two interconnections between existing water mains in Prince William County: one at Tanyard Hill Road and the other at the Horner Road Commuter Parking Lot (alternate location: Lake Ridge).

The engineering design, design schedule, construction schedule, and construction process are being managed by Fairfax Water, with coordination among the three utilities.