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.
Race Rock Light is a lighthouse on Race Rock Reef, a dangerous set of rocks on Long Island Sound southwest of Fishers Island, New York and the site of many shipwrecks. It is currently owned and maintained by the New London Maritime Society as part of the National Historic Lighthouse Preservation Act program.
The Redridge Steel Dam is a steel dam across the Salmon Trout River in Redridge, Houghton County, Michigan. Completed in 1901, it is a flat slab buttress dam constructed of steel, a relatively rare material for construction of dams, which are typically made of earthenworks, concrete, or masonry. Most sources indicate that it was one of only three such dams constructed in the United States, the other two being the Ashfork-Bainbridge Steel Dam and the Hauser Lake Dam, the last of which failed within a year of construction.
The Cheboygan Crib Light is a light that marks the west pier head of the mouth of the Cheboygan River into Lake Huron. The pier head, in the center of the municipality of Cheboygan, is located at the north or lake end of Huron Street, and is one of the centerpieces of Cheboygan's Gordon Turner Park.
The first Saginaw River lighthouse was constructed from 1839 to 1841, in a period when large quantities of lumber were being harvested and shipped from the heart of Michigan via river and the Great Lakes to the East Coast of the United States via the Erie Canal and Hudson River. This connection to major eastern markets was critical to the development of central Michigan.
The Lynde Point Light or Lynde Point Lighthouse, also known as Saybrook Inner Lighthouse, is a lighthouse in Connecticut, United States, on the west side of the mouth of the Connecticut River on the Long Island Sound, Old Saybrook, Connecticut. The first light was a 35 feet (11 m) wooden tower constructed by Abisha Woodward for $2,200 and it was completed in 1803. A new lighthouse was eventually needed and a total of $7,500 was appropriated on July 7, 1838. Jonathan Scranton, Volney Pierce, and John Wilcox were contracted to build the new 65-foot (20 m) octagonal brownstone tower. It was constructed in 1838 and lit in 1839. The lighthouse was renovated in 1867 and had its keeper's house from 1833 replaced in 1858 with a Gothic Revival gambrel-roofed wood-frame house. In 1966, the house was torn down and replaced by a duplex house. The original ten lamps were replaced in 1852 with a fourth-order Fresnel lens, and with a fifth-order Fresnel lens in 1890. Lynde Point Lighthouse used whale oil until 1879 when it switched to kerosene. It was electrified in 1955 and fully automated by the United States Coast Guard in 1978. In 1990, it was added to the National Register of Historic Places and is significant for its "superior stone work in the tapering brownstone walls".
The Manistique East Breakwater Light is a lighthouse is located in the harbor of Manistique, Michigan. It was listed on the National Register of Historic Places in 2005.
The Harbor Beach Lighthouse is a "sparkplug lighthouse" located at the end of the north breakwall entrance to the harbor of refuge on Lake Huron. The breakwall and light were created by the United States Army Corps of Engineers to protect the harbor of Harbor Beach, Michigan, which is the largest man-made freshwater harbor in the world. Harbor Beach is located on the eastern edge of the Thumb of Huron County, in the state of Michigan.
Spectacle Reef Light is a lighthouse 11 miles (18 km) east of the Straits of Mackinac and is located at the northern end of Lake Huron, Michigan. It was designed and built by Colonel Orlando Metcalfe Poe and Major Godfrey Weitzel, and was the most expensive lighthouse ever built on the Great Lakes.
The Stannard Rock Light is a lighthouse located on a reef that was the most serious hazard to navigation on Lake Superior. The exposed crib of the Stannard Rock Light is rated as one of the top ten engineering feats in the United States. It is 24 miles (39 km) from the nearest land, making it the most distant lighthouse in the United States. It was one of the "stag stations", manned only by men, and had the nickname "The Loneliest Place in the World".
The Detroit River Light, also known as Bar Point Shoal Light, was first established as a lightship in 1875. The current sparkplug lighthouse was built in 1885. It sits in Lake Erie, south of the mouth of the Detroit River, 1.75 nautical miles from land and about 20 nautical miles from the Ambassador Bridge in the Detroit River. It is about 0.4 nautical miles from the border with Canada, and just under 24 nautical miles from Put-in-Bay, Ohio. Its original 4th order Fresnel lens is on loan to the Michigan Maritime Museum.
The Long Tail Point Light, also known as the Tail Point Light, was a lighthouse in Green Bay, Wisconsin, USA. Long abandoned but still standing, it was succeeded by two further structures, both since destroyed.
The Peshtigo Reef Light is a lighthouse in Marinette County, Wisconsin, United States, offshore in lower Green Bay. Constructed in 1936 to replace a lightship, it remains in service.
The Navigation Structures at Frankfort Harbor are a collection of breakwaters, piers, and other structures in Lake Michigan located at the foot of Second Street in Frankfort, Michigan. They were listed on the National Register of Historic Places in 1997.
The Racine Reef Light was a lighthouse located in Lake Michigan some two miles east of Racine, Wisconsin, marking the edge of its eponymous shallows. It was torn down in 1961 and replaced with a skeleton tower on the same foundation.
Chester Rock Light was a light in Chester, Connecticut on the Connecticut River. It was built in 1889 as part of a $15,000 appropriation by the United States Congress. The 21-foot tall wooden hexagonal pyramidal tower had a black lantern with a 6th order Fresnel lens. The light was first lit on July 1, 1889. The tower was replaced in 1912 by a skeleton tower that was subsequently modified in 1927. Records do not show the deactivation or destruction of the light, but it was believed to have been removed in the 1930s. In the 1990s, the Deep River Historical Society of Deep River, Connecticut wanted to build a replica of the structure for use as a daymark.
Daugavgrīva Lighthouse is a lighthouse located in Daugavgrīva on the Bay of Riga on the Latvian coast of the Baltic Sea. The lighthouse was built in 1956, located next to Daugava River. Due to the change in the river's course, several lighthouses have been built, destroyed, and rebuilt again over the course of history.
The conservation and restoration of lighthouses is when lighthouse structures are preserved through detailed examination, cleaning, and in-kind replacement of materials. Given the wide variety of materials used to construct lighthouses, a variety of techniques and considerations are required. Lighthouses alert seagoers of rocky shores nearby and provide landmark navigation. They also act as a physical representation to maritime history and advancement. These historic buildings are prone to deterioration due to their location on rocky outcrops of land near the water, as well as severe weather events, and the continued rise of sea levels. Given these conditions preservation and conservation efforts have increased.
The Keweenaw Waterway Lower Entrance Light, also known as the Portage Entry Light, is a lighthouse located at the south end of breakwater at mouth of the Portage River in Torch Lake Township. It was listed on the National Register of Historic Places in 2014.
