Navigation Structures at Pentwater Harbor

Pentwater Pierhead Lights
Pentwater pier, showing south (left) and north (right) pierhead lights
Location	West End of Lowell St., Pentwater, Michigan
Year first constructed	south: 1937 / north: 1997
Year first lit	1873
Automated	1917
Foundation	concrete pier
Construction	steel skeleton tower (south) / cylindrical "D9-type" tower (north)
Focal height	south: 48 feet (15 m) / north: 43 feet (13 m)^[1]
Original lens	red 6th-order Fresnel lens^[1]
Current lens	both: 12-inch (300 mm) optic
Characteristic	0.5sec flash, 4.5sec eclipse
Fog signal	3sec every 30sec
ARLHS number	south: USA1270^[2] / north: USA594^[3]
USCG number	7-18620 and 7-18630

Navigation Structures at Pentwater Harbor
U.S. National Register of Historic Places
Show map of Michigan Show map of the US
Coordinates	43°46′51″N 86°26′25″W / 43.78083°N 86.44028°W / 43.78083; -86.44028Coordinates: 43°46′51″N 86°26′25″W / 43.78083°N 86.44028°W / 43.78083; -86.44028
Area	less than 1 acre (0.40 ha)
NRHP Reference #	00001638^[4]
Added to NRHP	January 11, 2001

The Navigation Structures at Pentwater Harbor are navigational structures located at the west end of Lowell Street in Pentwater, Michigan. They were listed on the National Register of Historic Places in 2001.^[4]

History

In 1855, Charles Mears constructed a 70-foot-wide (21 m) channel from Pentwater Lake to Lake Michigan, lined with timber cribbing,^[1] to accommodate his lumbering interests.^[5] In 1858, he built a pier extending over 600 feet (180 m) into Lake Michigan where ships could dock.^[6] Additional pier structures were built to line the channel.^[6] The first incarnation of the channel was relatively shallow, but Mears continued to improve it, and by 1865 it was deep enough that a lake-going steamer, the Daylite, was able to sail into Pentwater Lake.^[1]

In 1868 the US government began widening and improving Mears's channel.^[5] The channel was widened to 150 feet (46 m) and dredged to a depth of 16 feet (4.9 m).^[1] Two piers were constructed, and in 1873 a timber-framed lighthouse, 33 feet (10 m) high,^[1] was built on the south pier.^[6] A red 6th-order Fresnel lens was installed.^[1] A life-saving station was constructed on the north pier in 1887,^[5] and in 1917 the pierhead light was automated.^[1]

In 1937, the entire pier structure was replaced by the Army Corps of Engineers with a concrete pier.^[1] At the same time, the timber-framed lighthouse was replaced with a steel skeleton structure,^[6] and the optic replaced with a 300-millimeter (12 in) lens.^[1] Most of the life-saving station site, with the exception of the flag tower, was demolished in 1958.^[5] A second light was erected on the north pier in 1997.^[6]

Description

The Pentwater navigational structures consist of two concrete piers extending into Lake Michigan. At the end of the north pier sits a cylindrical modified "D9-type" tower topped with a 300-millimeter flashing green acrylic optic at a focal plane of 43 feet (13 m).^[1] At the end of the south pier sits a steel skeleton tower topped with a 300-millimeter flashing acrylic optic at a focal plane of 48 feet (15 m).^[1]

References

1 2 3 4 5 6 7 8 9 10 11 12 Pepper, Terry. "Pentwater Pierhead Light". Seeing the Light. Retrieved November 20, 2013.
↑ "Pentwater Pierhead South (Lake Michigan) Light". The Weidner Publishing Group. Retrieved November 20, 2013.
↑ "Pentwater Pierhead North (Lake Michigan) Light". The Weidner Publishing Group. Retrieved November 20, 2013.
1 2 National Park Service (July 9, 2010). "National Register Information System". National Register of Historic Places. National Park Service.
1 2 3 4 "Pentwater History". Pentwater.org. Retrieved November 20, 2013.
1 2 3 4 5 "History". PentwaterChannel.org. Retrieved November 20, 2013.

U.S. National Register of Historic Places

Topics	Architectural style categories Contributing property Historic district History of the National Register of Historic Places Keeper of the Register National Park Service Property types

Lists by states	Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

Lists by insular areas	American Samoa Guam Minor Outlying Islands Northern Mariana Islands Puerto Rico Virgin Islands

Lists by associated states	Federated States of Micronesia Marshall Islands Palau

Other areas	District of Columbia Morocco

Portal WikiProject

Lighthouses in Michigan

Northern Upper Peninsula	Au Sable Big Bay Point Copper Harbor Copper Harbor Front Range Crisp Point Eagle Harbor Eagle Harbor Range Lights Eagle River Fourteen Mile Point Grand Island East Channel Grand Island Harbor Rear Range Grand Island North Grand Marais Range Lights Granite Island Gull Rock Huron Island Isle Royale Manitou Island Marquette Breakwater Outer Marquette Harbor Mendota (Bete Grise) Munising Front Range Munising Rear Range Ontonagon Ontonagon Harbor West Breakwater Portage River (Jacobsville) Passage Island Rock Harbor Rock of Ages Sand Hills Sand Point Light (Baraga) St. Martin Island Stannard Rock Thunder Bay Island Whitefish Point

Southern Upper Peninsula	DeTour Reef Lansing Shoals Manistique East Breakwater Martin Reef Menominee Pier Minneapolis Shoal Naubinway Island Peninsula Point Poverty Island Sand Point Seul Choix Squaw Island St. Martin Island

St. Mary's River	Frying Pan Island Pipe Island Point Iroquois Round Island Light (St. Mary's River) Six Mile Point Range Rear Winter Point Range Front

Portage River/Ship Canal	Keweenaw Waterway Lower Entrance Keweenaw Waterway Upper Entrance Portage Lake Rouleau Point Range Front and Rear Lights

Straits of Mackinac	Bois Blanc McGulpin Point Old Mackinac Point Round Island Round Island Passage St. Helena Island

Western Lower Peninsula	Beaver Island Harbor Beaver Island Head Big Sable Point Cedar River Charlevoix Charlevoix South Pier Frankfort Frankfort South Range Grand Haven North Pierhead Grand Haven South Pierhead Entrance Grand Haven South Pierhead Inner Grand Traverse Grays Reef Holland Harbor Ile Aux Galets Little Sable Point Little Traverse Ludington Manistee Pierhead Manning Memorial Mission Point Mission Point (1933) Muskegon Breakwater Muskegon Pier North Manitou Shoal Pentwater North Pierhead Pentwater South Pierhead Point Betsie Portage Lake South Fox Island South Haven South Manitou Island St. Joseph North Pier Inner St. Joseph North Pier Outer South Manitou Island Waugoshance White River White Shoal

Eastern Lower Peninsula	Alpena Caseville Harbor Charity Island Cheboygan Crib Cheboygan River Front Range DeTour Reef Detroit River Fort Gratiot Forty Mile Point Fourteen Foot Shoal Gibraltar Gravelly Shoal Harbor Beach Lake St. Clair Mariners Memorial Middle Island Miller Memorial New Presque Isle Old Presque Isle Peche Island Rear Range Poe Reef Pointe aux Barques Port Austin Port Sanilac Saginaw Bay Saginaw River Rear Range Spectacle Reef St. Clair Flats Front and Rear Range Light Sturgeon Point Tawas Point Thunder Bay Island Tri-Centennial Light of Detroit William Livingstone Memorial Windmill Point

Historical (lost) lights	Au Sable North Pierhead Belle Isle Clinton River Ecorse Ecorse Range Rear Gibraltar Grassy Island Grassy Island North Channel Range Lights Grassy Island South Channel Range Lights Grosse Ile North Channel Range Lights Grosse Ile South Channel Range Lights Harwood Point East Range Front Kalamazoo River Mama Juda Mama Juda Range Front Manistee Main Middle Lake George Monroe Pier New Buffalo North Manitou Island Saginaw Bay Sand Beach North Entrance East Squaw Point St. Mary's River Lower Range Front Vidal Shoals Channel Range Front and Rear Lights Windmill Point Range Front and Rear Lights

Related	Lightship Huron List of lifesaving stations in Michigan

This article is issued from Wikipedia - version of the 11/30/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

Navigation Structures at Pentwater Harbor

History

Description

References

Further reading