MoCo’s Lost City: Triadelphia

Triadelphia (“three brothers”) was founded in 1809 by brothers-in-law Thomas Moore, Isaac Briggs, and Caleb Bentley, who were married to the Brooke sisters (Descendents of Robert Brooke, the founder of Brookeville).

“Born of the Patuxent River and then destroyed by it, the mill town Triadelphia knew years of glory as a leading Maryland industrial center.” – Sandy Spring Museum. Today the Patuxent River marks the NE border of MoCo, but between 1809 and the civil war it powered the mills that made Triadelphia a thriving industrial community. At the time, it was even larger nearby Rockville.
As planned; cotton, grist, saw, and plaster mills in the town were all powered by the river. It was the only town of its kind in Montgomery County, but nearby cities, like Ellicott City, were formed with the same purpose. So what happened to Triadelphia?

The same water that helped create the thriving town ended up destroying it. A flood in 1868 causes significant damage to Triadelphia and other surrounding areas. Almost every mill was completely destroyed except for the grist mill. Entire homes were even swept away. 

There were attempts to rebuild some of the other mills, but the Johnstown flood of 1889 completely destroyed everything that was rebuilt. At that point, steam power and gasoline had become far more popular. Railroads were used for transporting goods, so it was beneficial to build towns closer to the tracks, and the decision was made not to rebuild Triadelphia.
In 1943, WSSC completed construction of the Brighton Dam. This led to the complete submerging of what was left of the town. Not much remains of Triadelphia, but a graveyard that’s located on a hill overlooking the town did go untouched and a bell from 1837 that once called the mill hands in to begin work for the day can be found at Sherwood High School.
Featured photo courtesy of the Sandy Spring Legacy

Recent Stories

The organizers of the upcoming “Pride in the Plaza” festival this summer are currently in search of designs for the 2024 event t-shirt.

Detectives from the Montgomery County Department of Police – Special Victims Investigations Division (SVID) are asking for the public’s assistance in locating Jayden Matlock, a missing 15-year-old from Silver Spring.

Update: Einstein High School has been cleared. Staff and students are returning back to campus. The threat was determined to be not credible. The Shelter-in-Place at Thomas S. Wootton HS…

Update: The Shelter-in-Place at Thomas S. Wootton HS has been lifted as of 10:48 am. 911 emergency services have completed their assessment and deemed this a non-credible threat. Classes and…

FEST OF SPRING Caribbean Wine Food & Music Festival

Get ready to experience the vibrant colors, tantalizing flavors, and infectious rhythms of the Caribbean at the FEST OF SPRING Caribbean Wine Food & Music Festival! Hosted by RHU LLC, this exciting festival is set to take place on May 18, 2024, at the picturesque 16700 Barnesville Rd in Boyds, MD.

Step into a world where the Caribbean spirit comes alive! From 12:00 PM onwards, immerse yourself in a sensory journey that celebrates the unique culture, cuisine, and music of the Caribbean. Whether you're an African American, a Reggae or Soca music enthusiast, a wine lover, or part of the vibrant Caribbean diaspora, this festival promises to delight and captivate you in every way.

Let the enticing aromas of mouthwatering Caribbean dishes tantalize your taste buds. Feast on traditional delicacies prepared by expert chefs, showcasing the rich and diverse culinary heritage of the Caribbean. Indulge in flavorful jerk chicken, succulent seafood, and delectable plantain dishes that will transport you straight to the islands.

Accompanying the culinary extravaganza is a carefully curated selection of premium wines, ensuring the perfect pairing for your palate. Sip on fine wines from renowned vineyards, each sip a reflection of the Caribbean's vibrant spirit. Discover new flavors, expand your wine knowledge, and savor unforgettable moments with every glass.

As the sun sets, get ready to groove to the infectious rhythms of Caribbean music. Feel the pulsating beats of reggae, soca, dancehall, and calypso, moving your body to the lively melodies. Live performances by talented musicians and performers will keep the energy high, ensuring a night of unforgettable entertainment.

Don't miss this opportunity to embrace the Caribbean spirit and celebrate the arrival of spring in style! Tickets are available on AllEvents, so secure your spot today. Join us at the FEST OF SPRING Caribbean Wine Food & Music Festival, where cultures collide and unforgettable memories are made.



2 NIGHT Camping packages available: RV/CAMPER $200 | TENTS $150 Starting on Friday May 17 @ 5pm | 30 RV SPACES | 30+ TENT SPACES



Subscribe to our mailing list