You can now create your own itineraries to guide your C&O Canal exploration, or you can copy one of ours! Learn more about Itineraries.
A few minutes walk downstream from the Great Falls, you’ll find a picturesque white structure above the canal. It looks like a covered bridge; however, it’s an important piece of canal engineering called a stop gate. Learn more.
A few minutes walk downstream from the Great Falls, you’ll find a picturesque white structure above the canal. It looks like a covered bridge; however, it’s an important piece of canal engineering called a stop gate.
Stop gates were built to help protect the canal downstream from flood waters. At Great Falls, flooding usually occurs above Great Falls, as the waters of the Potomac River cross the towpath and inundate the canal. If left alone, this wall of water would continue down the canal and threaten miles of canal locks, levels, and communities built around them.
In the event of a flood, the stop gate can be lowered, creating a wall to divert water back into the river, thus protecting the canal downstream. This particular stop gate was originally built in 1852. If you look at the stone walls of the stop gate, you can still see the original groove that the boards slide into. Above the stop gate is a structure that most people think must be a covered bridge. Rebuilt in 2009, the building houses the working parts of the stop gate – the boards used to create the wall and a modern winch system to lower and raise them.
The C&O Canal has suffered from many floods throughout its history. The use of seven stop gates reduced the damage caused by those floods and prevented additional devastation. Flooding continues to be a concern today, and the stop gate at Great Falls is still lowered before big flood events. In that way, the canal continues to play a role in protecting communities downstream.
We welcome you to come out and visit the stop gate (not a covered bridge) at Great Falls. The surrounding area of the stop gate, usually quiet and idyllic, is a great place to escape the hustle and bustle of the busier sites. That is, unless the park is anticipating a big flood event… then you’ll get a chance to see the power of the river and the stop gate in action.
And while you’re here, look for other canal engineering features. There are numerous important canal features located upstream of the stop gate, and they’re all highlighted in the points of interest section below. An easy 8 mile bike ride will take you past all of these structures.
We know that to preserve something, you need to experience it, so we are proud to provide support to the C&O National Historical Park as their official philanthropic partner.
Please visit the National Park Service website for the following information:
For more information and nearby places to stay or grab a bite to eat, please visit our local tourism partners:
There has been a lapse in appropriations, and a shutdown of the federal government is currently in effect. Much of the C&O Canal National Historical Park remains open to the public, however, the National Park Service is not able to operate as normal. Visitor services, including park visitor centers and other NPS-staffed facilities, will not be available. Inquiries to the National Park Service will not be received or responded to until the shutdown ends.
The C&O Canal Trust’s staff are currently working remotely. Scheduled Trust events and Canal Quarters reservations will continue as scheduled. While a federal government shutdown is in effect, visitors should not expect services typically provided by the National Park Service to be available. All visitors are urged to practice safety in the park and plan ahead. Be a good park steward by recreating responsibly and practicing Leave No Trace principles, respecting cultural and natural resources.
Information regarding the Department of Interior’s Operations in the Absence of Appropriations can be found here: https://www.doi.gov/shutdown.
When federal funding is restored, we look forward to continuing to work with our park partner to ensure the C&O Canal remains beautiful, safe, and welcoming for visitors today and for future generations. Love the Park? Help the Trust! Consider making a donation. Your support directly helps fund beautification, conservation, education, and preservation initiatives in the park.