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

Get smart about D.C. with our news roundup and analysis.

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

DC History

See All
DC HistoryApril 16

Get To Know the Architecture of DC Homes

D.C.’s neighborhoods are a patchwork of distinct architectural styles, each tied to a specific historical moment.

Logan Circle is known for its "gaslight era" Victorian homes. (Kimprobable/Getty Images)
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)

The latest in DC

AnnouncementsMay 12

Kaela Cote-Stemmermann Is City Cast DC’s New Food and Culture Reporter

City Cast DC is undergoing an unprecedented expansion of its local newsroom, hiring a team of journalists to create original reporting ab...

The DC DispatchMay 12

"Downright scandalous:" Inside the NSFW text messages that got a top D.C. police official put on leave

An internal report shows ex-executive assistant chief Andre Wright repeatedly sent crude texts and mocked colleagues.

An internal report shows ex-executive assistant chief Andre Wright repeatedly sent crude texts and mocked colleagues. (Saul Loeb/AFP via Getty Images)
The DC DispatchMay 5

Police Chief: 13 Top Officials Face Termination Amid Crime Stats Scandal

Jeffery Carroll also confirmed the restructuring of the department.

Interim MPD Chief of Police Jeffery Carroll.
The DC DispatchMay 4

Multiple D.C. Police Leaders Face Termination Over Crime Data Manipulation

The changes could constitute a sweeping restructuring of department leadership.

Metropolitan Police Department outside of Nationals Park on August 15, 2025. (Kayla Bartkowski/Getty Images)
AnnouncementsMay 4

We're launching two new newsletters

Sign up now to get the big stories Washington is talking about and our can't-miss guide to food and culture.

DC, ExplainedMay 4

The Obama musical returns Washingtonians to an old, hopeful DC

This raunchy love letter to 2008 D.C. by a former Obama campaign staffer left us weeping with laughter and nostalgia.

TJ Wilkins starring as Barack Obama sings “How Black Is Too Black?” (Courtesy of “44”)
DC Life HacksApril 30

Your Guide to DC in May 2026

So bust out your social planner, here’s our 🔥 super hot 🔥 monthly guide to the District for May.

Union Market drive-in movies. (The Washington Post/Getty Images)
DC Life HacksApril 30

The Best Bands To See At DC’s 2026 Porchfests

This summer's porchfests are going to be bigger than ever. Here are all the bands you can't miss, plus some tips for making the most of t...

Petworth Porchfest