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Algoma Pierhead Lighthouse

Iso R 6s🇺🇸Eastern Wisconsin, USOperational

Location & Light Range

About Algoma Pierhead Lighthouse

This steel conical tower, originally built in 1908, stands 12.5 meters tall. It was constructed from 7.9 mm thick steel plate, with a base diameter of 2.4 meters tapering to 2.1 meters at the parapet. In 1932, the structure underwent a significant modification; the original tower was placed atop a new 3.7-meter diameter steel base, increasing its overall height and raising the focal plane to 14.5 meters. The Algoma Pierhead Light, first established in 1893 as range lights, was automated in 1973. It emits a single red light.

Background
The Algoma Light or Algoma Pierhead Light is a lighthouse located near Algoma in Kewaunee County, Wisconsin. The lighthouse was first established in 1893 as a set of range lights. It was rebuilt in 1908, at which time it was a conical tower built of 5⁄16-inch (7.9 mm) steel plate, 8 feet (2.4 m) in diameter at the base and 7 feet (2.1 m) in diameter at the parapet. It stood 26 feet (7.9 m) high. In 1932, it was modified again and the entire structure was raised to a height of 42 feet (13 m) by placing the older tower on a new steel base 12 feet (3.7 m) in diameter, that increased the focal height to forty-two feet. The station was automated in 1973. It is listed as number 20975 in the USCG light lists.

Light & Optic

Characteristic Signature
Iso R 6s
Flash Type
Isophase
Light Color
Red
Flash Count
1 flash
Interval
6s
Focal Height
14.5m

Construction & History

Year Built
1908

References & Identifiers

Wikipedia
Read on Wikipedia →
Wikidata
Q4724302 →

Tower & Structure

Tower Height
12.5m

Location

City
Eastern Wisconsin
Country
🇺🇸US
Latitude
44.6068°
Longitude
-87.4295°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Algoma Pierhead Lighthouse at night?+
Algoma Pierhead displays the characteristic Iso R 6s — 1 red flash every 6 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Algoma Pierhead Lighthouse guide vessels into?+
Algoma Pierhead Lighthouse assists vessels approaching 5 nearby ports. The closest is ALGOMA at 0.2 NM to the NW. Other ports served include Kewaunee (9.2 NM SSW), STURGEON BAY (13.7 NM N), OCONTO (24.5 NM NW), Green Bay (25.8 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Algoma Pierhead Lighthouse still active and maintained?+
Yes, Algoma Pierhead Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
How can I track vessels near Algoma Pierhead Lighthouse?+
You can track vessels near Algoma Pierhead Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.