Potomac River Bridge

There is a bridge here which takes a motorway over the canal.
Cushwa Basin | 1.21 miles | |
West Potomac Bridge | 1.15 miles | |
Railroad Lift Bridge (Western Maryland Railway) | 1.13 miles | |
Salisbury Street Bridge | 1.10 miles | |
Williams Port Lock No 44 | 0.72 miles | |
Potomac River Bridge | ||
Lock No 43 (C&O) | 3.80 miles | |
Lock No 42 (C&O) | 7.80 miles | |
Lock No 41 (C&O) | 7.97 miles | |
Guard Lock No 4 | 11.49 miles | |
Stop Gate (Dam No 4) | 12.76 miles |
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CanalPlan has no information on any of the following facilities within range:water point
rubbish disposal
chemical toilet disposal
place to turn
self-operated pump-out
boatyard pump-out
Wikipedia has a page about Potomac River Bridge
The Governor Harry W. Nice Memorial/Senator Thomas "Mac" Middleton Bridge, also known as the Potomac River Bridge, is a 1.7-mile (2.7 km), two-lane continuous truss bridge that spans the Potomac River between Newburg in Charles County, Maryland and Dahlgren in King George County, Virginia, United States. The bridge is narrow (one 11-foot (3.4 m) lane in each direction with no shoulders), steep (up to 3.75 percent grade), and has a reduced speed limit (50 mph (80 km/h) on the main span, even slower through the southbound toll gates and plaza). By contrast, the approach roads on both sides of the bridge feature four 12-foot (3.7 m) lanes (2 in each direction), full shoulders, and 55 mph (89 km/h) speed limits. This combination forces vehicles to slow and merge as they cross the bridge, which often results in backups.
This two lane bridge carries U.S. Route 301, which is a spur of U.S. Route 1 and a popular north–south alternative for bypassing the Baltimore-Washington Metropolitan Area and its frequently congested roads such as Interstate 95, Interstate 495 (Capital Beltway), and the Woodrow Wilson Bridge to the north along the Potomac River. The traffic growth/volume in Southern Maryland has led to congestion and delays, especially on holidays and weekends. In 2014, the bridge handled approximately 6.4 million vehicles, with a daily average of approximately 17,500.
It is one of eight toll facilities operated by the Maryland Transportation Authority, and is one of two toll bridges over the Potomac River. The other, the privately owned Oldtown Low Water Toll Bridge, connects Maryland and West Virginia, far upstream.
In March 2020, all-electronic tolling was implemented as a result of the COVID-19 pandemic, with tolls payable through E-ZPass or Video Tolling, which uses automatic license plate recognition. All-electronic tolling was made permanent in August 2020.