Near Dickerson in Montgomery County, Maryland — The American Northeast (Mid-Atlantic)

Chesapeake and Ohio Aqueduct

Across the Monocacy River

Monocacy Aqueduct Marker image. Click for full size.

Photographed By J. J. Prats, November 4, 2006

1. Monocacy Aqueduct Marker

Inscription. Largest of eleven C&O aqueducts. Finished 1833, Alfred Cruger, Principal Engineer. Constructed of quartzite from Sugarloaf Mountain. It served until 1924, when after a flood, commercial operations ceased.

Administered by the National Park Service.

Erected by State Roads Commission.

Topics and series. This historical marker is listed in these topic lists: Bridges & Viaducts • Landmarks • Waterways & Vessels. In addition, it is included in the Chesapeake and Ohio (C&O) Canal series list. A significant historical year for this entry is 1833.

Location. 39° 13.482′ N, 77° 25.598′ W. Marker is near Dickerson, Maryland, in Montgomery County. Marker is at the intersection of Dickerson Road (Maryland Route 28) and Mouth of the Monocacy Road, on the left when traveling north on Dickerson Road. Touch for map. Marker is at or near this postal address: 20400 Mouth of Monocacy Road, Dickerson MD 20842, United States of America. Touch for directions.

Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies. Historic Site (approx. 0.4 miles away); Springing Over the Monocacy / The Enduring Aqueduct (approx. 1.3 miles away); Monocacy Aqueduct (approx. 1.3 miles away); 1862 Antietam Campaign (approx. 1½ miles away); Gettysburg Campaign

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(approx. 1½ miles away); Washington's Farm (approx. 1.9 miles away); Linden Farm (approx. 2.2 miles away); Equestrian Heritage (approx. 2.4 miles away). Touch for a list and map of all markers in Dickerson.

C&O Monocacy Aqueduct Marker image. Click for full size.

Photographed By J. J. Prats, November 4, 2006

2. C&O Monocacy Aqueduct Marker

River Road is on the right, with Mouth of the Monocacy Road heading left.

Sugarloaf Mountain image. Click for full size.

Photographed By Craig Swain, June 29, 2007

3. Sugarloaf Mountain

Within site of the marker is Sugarloaf Moutain, from which rock was quarried to build the aqueduct.

The C&O Canal Crossed the Monocacy River Over This Seven Arch Aqueduct image. Click for full size.

Photographed By J. J. Prats, November 4, 2006

4. The C&O Canal Crossed the Monocacy River Over This Seven Arch Aqueduct

Monocacy Aqueduct image. Click for full size.

Photographed By J. J. Prats, November 4, 2006

5. Monocacy Aqueduct

Those cyclists are riding on what used to be the bottom of the canal. The aqueduct carried the C&O Canal across the Monocacy river. Mules walked the towpath on the right pulling the boats along.

Credits. This page was last revised on September 22, 2019. It was originally submitted on November 5, 2006, by J. J. Prats of Powell, Ohio. This page has been viewed 2,493 times since then and 14 times this year. Last updated on January 3, 2009, by Richard Pasquale of Gaithersburg, Maryland. Photos: 1, 2. submitted on November 5, 2006, by J. J. Prats of Powell, Ohio. 3. submitted on June 29, 2007, by Craig Swain of Leesburg, Virginia. 4, 5. submitted on November 5, 2006, by J. J. Prats of Powell, Ohio. • Kevin W. was the editor who published this page.