A screw-pile lighthouse is a lighthouse which stands on piles that are screwed into sandy or muddy sea or river bottoms. The first screw-pile lighthouse to begin construction was built by the blind Irish engineer Alexander Mitchell. Construction began in 1838 at the mouth of the Thames and was known as the Maplin Sands lighthouse, and first lit in 1841. However, though its construction began later, the Wyre Light in Fleetwood, Lancashire, was the first to be lit.
The Seven Foot Knoll Light was built in 1855 and is the oldest screw-pile lighthouse in Maryland. It was located atop Seven Foot Knoll in the Chesapeake Bay until it was replaced by a modern navigational aid and relocated to Baltimore's Inner Harbor as a museum exhibit.
The Thomas Point Shoal Light, also known as Thomas Point Shoal Light Station, is a historic lighthouse in the Chesapeake Bay on the east coast of the United States, and the most recognized lighthouse in Maryland. It is the only screw-pile lighthouse in the bay which stands at its original site. The current structure is a 1½ story hexagonal wooden cottage, equipped with a foghorn as well as the light.
The American Shoal Light is located east of the Saddlebunch Keys, just off Sugarloaf Key, close to Looe Key, in Florida, United States. It was completed in 1880, and first lit on July 15, 1880. The structure was built to the same plan and dimensions as the Fowey Rocks lighthouse, completed in 1878.
Sand Key Light is a lighthouse 6 nautical miles southwest of Key West, Florida, between Sand Key Channel and Rock Key Channel, two of the channels into Key West, on a reef intermittently covered by sand. At times the key has been substantial enough to have trees, and in 1900 nine to twelve thousand terns nested on the island. At other times the island has been washed away completely. The light marks the southernmost point of the Hawk Channel passage along the Florida Keys.
The unmanned reef lights of the Florida Keys were navigational aids erected near the Florida Keys between 1921 and 1935.
Solomons Lump Light is a lighthouse in the Chesapeake Bay, the abbreviated remains of a caisson light built in 1895. That structure replaced a screw-pile light built on the same spot in 1875, which in turn superseded the Fog Point Light.
The Sharkfin Shoal Light was a screw-pile lighthouse located at the mouth of the Nanticoke River in Chesapeake Bay, US.
Greenbury Point Light was the name of two lighthouses in the Chesapeake Bay, both located at the mouth of the Severn River in Annapolis, Maryland.
The Lower Cedar Point Light was a historic lighthouse in the Potomac River near its eponymous point, south of the present Governor Harry W. Nice Memorial Bridge, which carries U.S. Route 301 between Maryland and Virginia. It has been replaced by a skeleton tower.
The Janes Island Light was a screw-pile lighthouse located near Crisfield in the U.S. state of Maryland. Twice destroyed by ice, it was replaced in 1935 with an automated beacon.
Thimble Shoal Light is a sparkplug lighthouse in the Virginia portion of Chesapeake Bay, north of the Hampton Roads channel. The third light at this location, it is listed on the National Register of Historic Places.
The Old Plantation Flats Light was a lighthouse located in the Chesapeake Bay marking the channel to Cape Charles, Virginia.
The Fort Ripley Shoal Light or Middle Ground Light was a lighthouse in the Charleston, South Carolina harbor approaches.
Ship Island Light was a lighthouse in Mississippi near Gulfport.
The Cat Island Light was a lighthouse located on Cat Island off the coast of Mississippi. Originally built to guide shipping through the Mississippi Sound, it was discontinued as traffic moved further south.
The New Canal Light or was first established in 1838 at the north end of the New Basin Canal which ran from Lake Pontchartrain to the Uptown or "American" section of the city which today is known as the New Orleans Central Business District. The canal was filled in about 1950, but the lighthouse remained on a jetty extending into the lake on a half mile long stretch of the canal that was left and is still used as a small boat and yachting harbor.
The Ship Shoal Light is a screw-pile lighthouse located in the Gulf of Mexico southwest of the Isles Dernieres off the coast of Louisiana. It is currently abandoned.
The Sabine Bank Light is a caisson lighthouse in the Gulf of Mexico south of the mouth of the Sabine River. It is still active, though the original tower has been replaced with an automated beacon on a skeleton tower.
The South Pass Light, also known as the Port Eads LighthouseSouth Point Light, or Gordon's Island Light, are a pair of lighthouses located on Gordon's Island at South Pass, in Plaquemines Parish, Louisiana (USA), one of the primary entrances to the Mississippi River Delta from the Gulf of Mexico. The light station was established in 1831 and is still active.
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