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Havre de Grace in Harford County, Maryland — The American Northeast (Mid-Atlantic)
 

Dangerous Waters

 
 
Dangerous Waters Marker image. Click for full size.
Photographed by William Pfingsten, June 24, 2007
1. Dangerous Waters Marker
Inscription. On the point where the mighty Susquehanna River meets the Chesapeake Bay stands the lighthouse that protected vessels from dangerous waters for 148 years.

Built in 1827 to protect vessels from dangerous shoals and currents at the mouth of the Susquehanna River, the Concord Point Lighthouse served faithfully until it was decommissioned by the U.S. Coast Guard in 1975. In 1979, The Friends of Concord Point Lighthouse formed to preserve the lighthouse and keep a light burning in the tower.

The lighthouse was built by a prominent lighthouse contractor, John Donohoo. Donohoo, a native of Harford County, built 12 of the first Chesapeake Bay lighthouses. Donohoo also served as Havre de Grade town commissioner in the early 1800s.

The lighthouse is built from Port Deposit granite and has an unusual black 9 sided lantern. The stone walls at the base of the tower are 3 feet 11 inches thick and the tower is 36 feet tall. The light could be seen 8½ miles away. Originally lit with 9 whale oil lamps, the light became electrified and automated in 1920. This lighthouse was very well built and has needed few repairs over the years.

At the end of the Revolutionary War, the town of Havre de Grace renamed many of its streets to celebrate. Concord Street was named for the first victory of the war, the battle of Concord
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in 1775. And so, the lighthouse, which stands at the end of Concord Street on a point was named Concord Point Lighthouse.

In the 1800s, keel boats traveling down the Susquehanna River with goods to sell and bay schooners sailing up the bay were at risk here. These boats were made of wood and could easily break on the rocks at the mouth of the river. This lighthouse safeguarded the heavy merchant traffic of this area.
 
Topics and series. This historical marker is listed in these topic lists: CommunicationsLandmarksWaterways & Vessels. In addition, it is included in the Lighthouses series list. A significant historical year for this entry is 1827.
 
Location. 39° 32.438′ N, 76° 5.085′ W. Marker is in Havre de Grace, Maryland, in Harford County. It is at the intersection of Concord Street and Lafayette Street, on the left when traveling south on Concord Street. Touch for map. Marker is in this post office area: Havre de Grace MD 21078, United States of America. Touch for directions.

Regionally, this marker is in Central Maryland. It is also in the American Mid-Atlantic and in the Chesapeake Bay Region. Globally, it is in the North Atlantic Region, North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once one of the original Thirteen Colonies and also the Antebellum South.

Other nearby markers. At least 8 other markers are within walking distance of this marker: John O'Neill (here, next to this marker); The point where the Susquehanna River meets the Chesapeake Bay (a few steps from this marker); British Landing (a few steps from this marker); Concord Point Light Station (a few steps from this marker); Principio Destroyed (within
Concord Point Lighthouse image. Click for full size.
Photographed by William Pfingsten, June 24, 2007
2. Concord Point Lighthouse
shouting distance of this marker); Havre de Grace (within shouting distance of this marker); The Concord Point Light Keeper’s House and Property, 1827-1920 (within shouting distance of this marker); Keeper of the Light (within shouting distance of this marker). Touch for a list and map of all markers in Havre de Grace.
 
Another marker is no longer nearby. Concord Point Lighthouse (was within shouting distance of this marker but has been replaced with another marker now near it).
 
 
Credits. This page was last revised on May 29, 2024. It was originally submitted on June 30, 2007, by Bill Pfingsten of Bel Air, Maryland. This page has been viewed 2,023 times since then and 13 times this year. Last updated on January 3, 2021, by Carl Gordon Moore Jr. of North East, Maryland. Photos:   1, 2. submitted on June 30, 2007, by Bill Pfingsten of Bel Air, Maryland.
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Jun. 28, 2026