Update

Work on the Potomac Interceptor at Pennyfield Lock is moving faster than expected. Crews were able to make significant progess, finishing preparationg work to begin the permanent repair this morning. As a result the temporary closure in the Pennyfield Lock area where construction is taking place began one day earlier than the Friday, November 13, start we announced yesterday. That means, the C & O Canal National Historical Park at Pennyfield Lock (Lock 22), the Montgomery Parks Pennyfield Lock Neighborhood Conservation Area, and the boat ramp are closed as of today. 

We know many people use this area, and apologize for the delay in notifying the public before the closure took effect this morning.

Starting sliplining sooner helps us move closer to completing this permanent repair and protecting the Potomac River, nearby communities, and the region's drinking water supply.

What to Expect

• Closure dates: The closure began today, Thursday, November 12, and may remain in effect through Sunday, November 22, weather permitting.
• Closed areas: Pennyfield Lock (Lock 22), the Pennyfield Lock Neighborhood Conservation Area and boat ramp, and the parking lots at Lock 22 and near the boat ramp.
• Towpath: The C & O Canal towpath remains open, but the public will not be able to enter or exit the towpath through Pennyfield Lock or the Neighborhood Conservation Area.
• Pennyfield Lock Road: Access is limited to residents and local traffic only to allow for staging, equipment, and construction vehicles.
• Alternate access: The nearest access points to the towpath and the river are Violet's Lock (Lock 23) and Swains Lock (Lock 21).

Why Is the Area Closing?

DC Water is repairing about 1,700 feet of a 60-inch-diameter section of the Potomac Interceptor using a method called sliplining. Crews install new pipe sections inside the old one, creating a new, stronger pipe without having to dig up and replace the existing sewer line. The work requires heavy equipment and very large pipe sections to be moved and staged throughout the work area. Keeping the public out of the site is essential for everyone's safety.

Stay Informed

We appreciate the community's patience and understanding. For project updates, visit dcwater.com/potomacinterceptor.