Navigation Structures at Pentwater Harbor

Navigation Structures at Pentwater Harbor

Pentwater Pier, showing south (left) and north (right) pierhead lights
Location	Pentwater, Michigan, US
Coordinates	43°47′N 86°26′W / 43.78°N 86.44°W / 43.78; -86.44
Heritage	National Register of Historic Places listed place
Pentwater North Pierhead Light
Constructed	1997
Foundation	concrete pier
Construction	cylindrical "D9-type" tower[1]
Height	11 m (36 ft)
Fog signal	3sec every 30sec
Focal height	43 ft (13 m)
Lens	12 inches (300 mm) optic
Range	9 nmi (17 km; 10 mi)
Characteristic	Fl G 2.5s
Pentwater South Pierhead Light
Constructed	1937
Construction	concrete (pier), steel (tower)
Height	10 m (33 ft)
Heritage	National Register of Historic Places contributing property
Focal height	48 ft (15 m)
Lens	12 inches (300 mm) optic[2]
Range	4 nmi (7.4 km; 4.6 mi)
Characteristic	Fl R 4s
Navigation Structures at Pentwater Harbor
U.S. National Register of Historic Places
Area	less than 1 acre (0.40 ha)
NRHP reference No.	00001638[3]
Added to NRHP	January 11, 2001
Original light
Constructed	1873
Construction	lumber (artificial physical structure)
Automated	1917
Height	33 ft (10 m)
Deactivated	1937

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.^[3]