City Cast DC logo

The History of Great Falls and the Patowmack Canal

Posted on January 7, 2025   |   Updated on September 30, 2025
Natalia Aldana

Natalia Aldana

Great Falls, Potomac River in March 1864. (Russell, Andrew J./Library of Congress)

Great Falls, Potomac River in March 1864. (Russell, Andrew J./Library of Congress)

The Potomac River runs 405 miles long, flowing southeast past the District of Columbia into Chesapeake Bay and serves as the border between Virginia and Maryland. The Potomac is celebrated for its beauty and historical significance. George Washington built his Mount Vernon home along the banks below D.C.

At Great Falls in Virginia, the Potomac River finds its speed through the jagged rocks, making it a popular site for tourists and locals alike. It was a historic trading spot between the Indigenous people and early colonists.

Washington wanted to design a navigation and trade system from the Potomac River to the Ohio River Valley. After the Revolutionary War, he gathered representatives from Virginia and Maryland at Mount Vernon to form a company to work on the Potomac’s navigation system. In 1785, the Potowmack Canal Company was established to serve as a “door” to the western frontier, to reduce navigation hazards, and to establish commerce and unity.

The Potowmack Canal (sometimes spelled as Patowmack) is now considered one of the best examples of an early American canal system. The canal features by-passing waterways, consisting of five “skirting” canals constructed in areas where large obstacles couldn’t be removed. The canal was constructed with a mixed workforce of indentured servants, free laborers, and primarily enslaved laborers. It became operational in 1802, delayed by constant financial challenges. The Potowmack Company filed for bankruptcy after 26 years in operation.

Congress authorized the preservation of 800 acres around the Potowmack Canal as a park in 1930, and authority was transferred to the National Park Service in 1966. You can visit Great Falls Park every day except for Dec. 25.

see more:history

Share article

Hey DC

Stay connected to City Cast DC and get ready to join the local conversation.

Can't subscribe? Turn off your ad blocker and try again.

DC History

See All
DC HistoryMarch 30

The Rise & Fall of DC’s Iconic Wrestling Institution

At the height of the Great Depression in 1935, a small-time D.C. wrestler named Joe Turner opened what would become the city’s most succe...

 Joe Turner's arena
DC HistoryFebruary 17

Washington DC’s First Chinese Restaurants

D.C.’s Chinatown is a bit lackluster in terms of authentic cuisine, but that wasn’t always the case. Restaurants were some of the first C...

Port Arthur restaurant, Washington D.C. The largest Chinese restaurant in the city in 1909, owned by early restaurateurs Ung Wah. (Streets of Washington/Flickr)
DC HistoryJanuary 27

How This Storm Compares To DC’s Largest

Sunday’s snowstorm in D.C. was remarkable, not only because of how much snow we got but because the combo of cold temps and sleet means i...

Horse-driven sleigh on a snowy path near the Lincoln Memorial (Bettmann/ Getty Images)
DC HistoryNovember 18, 2025

6 Spy Sites In Washington, DC That Changed History

This nondescript park in Foggy Bottom, close to the State Department, has seen its fair share of spy activity.

Peirce Barn 1972. (HABS Survey/NPS)
DC HistoryOctober 23, 2025

DC’s Secret Séance History

In Gilded Age Washington, D.C., séances and Ouija boards weren’t just parlor tricks — they were part of a craze that swept through societ...

An illustration from the 19th century of a spiritual séance. (clu/Getty Images)
DC HistorySeptember 23, 2025

From The Archive: How DC Became a Showcase of Brutalism

Love them or hate them, Brutalism has become a central part of D.C.’s iconography over the years. Here's why.

DC Metro ceiling. (Ralph Grunewald/Getty Images)
DC HistoryAugust 26, 2025

The Glen Echo Carousel that Became a Civil Rights Movement

Tucked away in Glen Echo Park is one of the world's most elaborate and historic carousels that played a surprising roll in the Civil Righ...

The Glen Echo Dentzel carousel gets a last minute touch up before the season's inaugural ride. (The Washington Post/Getty Images)
DC HistoryAugust 11, 2025

The Wildest DC Political Scandals (That Didn’t Happen on Capitol Hill)

Case in point: the ongoing drama surrounding Ward 8 Councilmember Trayon White, who said on Friday (during his swearing-in ceremony after...

Portrait of Washington DC Mayor Marion Barry