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Calumet Harbor Entrance South Side Lighthouse

Fl Green 4s🇺🇸USOperational

Location & Light Range

About Calumet Harbor Entrance South Side Lighthouse

This 9-meter cylindrical tower, built in 1995, stands white with a single green horizontal band. It is mounted on a square platform supported by four cylindrical legs at the north end of a detached section of the Calumet Harbor Breakwater. The light emits a green flash every 4 seconds, visible for 10 nautical miles. Accessible only by boat, the structure is maintained by the U.S. Coast Guard and remains closed to the public for safety and operational purposes. It is situated across the harbor entrance from the Calumet Harbor Light.

Why it matters: This light, positioned opposite the main Calumet Harbor Light, helps define the safe passage into the harbor for commercial and recreational traffic.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
9m
Geographic Range
10NM

Construction & History

Year Built
1995

References & Identifiers

Nearest Port
Indiana Harbor(0.4 km)
USCG No.
7-19835
ARLHS No.
USA-1190

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
white with one green horizontal band

Structure: A 9m round cylindrical tower, painted white with one green horizontal band, mounted on a square platform supported by four cylindrical legs.

Location

Country
🇺🇸United States
Region
Indiana
Sea Region
at the north end of the detached section of the Calumet Harbor Breakwater, across the entrance from the Calumet Harbor Light.
Latitude
41.6736°
Longitude
-87.4389°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Calumet Harbor Entrance South Side Lighthouse at night?+
Calumet Harbor Entrance South Side displays the characteristic Fl Green 4s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Calumet Harbor Entrance South Side Lighthouse guide vessels into?+
Calumet Harbor Entrance South Side Lighthouse assists vessels approaching 5 nearby ports. The closest is East Chicago at 0.4 NM to the S. Other ports served include HAMMOND (3.3 NM WNW), Calumet (5.1 NM NW), CALUMET HARBOR (5.4 NM NW), Gary (6.1 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Calumet Harbor Entrance South Side Lighthouse still active and maintained?+
Yes, Calumet Harbor Entrance South Side 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 Calumet Harbor Entrance South Side Lighthouse?+
You can track vessels near Calumet Harbor Entrance South Side 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.