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.
Craney Island is a point of land in the independent city of Portsmouth in the South Hampton Roads region of eastern Virginia in the United States. The location, formerly in Norfolk County, is near the mouth of the Elizabeth River opposite Lambert's Point on Hampton Roads. It is home to the Craney Island US Naval Supply Center, managed by the U.S. Army Corps of Engineers.
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.
A caisson lighthouse is a type of lighthouse whose superstructure rests on a concrete or metal caisson. Caisson lighthouses were developed in the late nineteenth century as a cheaper alternative to screwpile lighthouses. The caisson design was also more efficient as it could better withstand harsh weather, and was not as fragile. Caisson lighthouses usually have living quarters made of cast iron, although some brick examples are known. The two American nicknames were later coined because of the structure's shape.
A Texas Tower lighthouse is a structure which is similar to an off-shore oil platform. Seven of these structures were built in the 1960s off the shores of the United States. Automation started in the late 1970s, which led to the obsolescence of the housing built for the keepers which resulted in such a large structure. Three of the towers were dismantled over time due to deteriorating structural conditions among other problems, while another one was destroyed in a ship collision. The last Texas Tower was deactivated in 2016 having served for over half a century. Today only three of the former lights remain.
The Baltimore Harbor Light, officially Baltimore Light and historically Baltimore Harbor Lighthouse is a privately owned caisson lighthouse in the Chesapeake Bay in Maryland. First lit in 1908, it sits at the mouth of the Magothy River, marking the channel which leads northwest to the opening of the Patapsco River, which then leads into the Baltimore harbor. At the time of its construction, it was the world's tallest caisson lighthouse. In June 2006, Baltimore Light was sold at auction to private owners by the General Services Administration for $260,000; the U.S. Coast Guard maintains rights to operate a light on the structure.
The Bodkin Island Light was a lighthouse on the Chesapeake Bay, United States, the first erected in Maryland.
The Lambert Point Light was a small screwpile lighthouse at Lambert's Point in Norfolk, Virginia; it was built in 1872.
Point Lookout Light is a lighthouse that marks the entrance to the Potomac River at the southernmost tip of Maryland's western shore of the Chesapeake Bay, south of the town of Scotland in Saint Mary's County, Maryland, USA. It is known for its association with ghost stories and has been the subject of paranormal investigations. The lighthouse is located in Point Lookout State Park. It is not open to the public..
Fort Washington Light is an unusual lighthouse located on the banks of the Potomac River on the grounds of its namesake fort. Although there has been a lighthouse on this location since 1857, the current light was converted from a fog bell tower in 1901.
The Choptank River Light was a screw-pile lighthouse located near Oxford, Maryland. In its second incarnation it was the only such light moved from another location in the Chesapeake Bay.
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.
Drum Point Light is one of four surviving Chesapeake Bay screw-pile lighthouses. Originally located off Drum Point at the mouth of the Patuxent River, it is now an exhibit at the Calvert Marine Museum.
Fort Carroll Light is a derelict lighthouse consisting of a short wooden tower on the walls of its namesake fortifications in the Patapsco River.
Wolf Trap Light is a caisson lighthouse in the Virginia portion of the Chesapeake Bay, about seven and a half miles northeast of New Point Comfort Light. It is listed on the National Register of Historic Places.
The York Spit Light was a lighthouse located at the mouth of the York River in the Chesapeake Bay, marking a long shoal paralleling the main channel into the river.
The Nansemond River Light was a screwpile lighthouse located at the confluence of the Nansemond and James rivers in Virginia.
Chesapeake Light is an offshore lighthouse marking the entrance to the Chesapeake Bay. The structure was first marked with a lightship in the 1930s, and was later replaced by a "Texas Tower" in 1965. The lighthouse was eventually automated and was used for supporting atmospheric measurement sites for NASA and NOAA. Due to deteriorating structural conditions, the lighthouse was deactivated in 2016. At the time it was the last remaining "Texas Tower" still in use due to obsolescence.
The Wyre Light was a 40-foot (12 m) tall iron screw-pile lighthouse marking the navigation channel to the town of Fleetwood, Lancashire, England.
