Piedra Diamante Lighthouse
Location & Light Range
About Piedra Diamante Lighthouse
The Piedra Diamante lighthouse is a 18-meter cylindrical concrete tower painted yellow, located on the Barra de San Pedro shoal in the Río de la Plata. This navigational aid emits a white light with one flash every 6 seconds, visible for 12.7 nautical miles. Situated about 8 kilometers north-northwest of Isla de Farallón, Uruguay, the lighthouse stands in shared waters under a 1973 treaty. Argentina maintains the light, as the adjacent shipping channel leads to Argentine ports on the Río Uruguay and Río Paraná. Uruguay holds economic rights to the seabed beneath the shoal.
Why it matters: This lighthouse is significant for vessels navigating the Río de la Plata's shipping channels, particularly those heading to Argentine ports. Its maintenance reflects a 1973 treaty governing shared maritime responsibilities between Argentina and Uruguay.
Light & Optic
- Flash Type
- Flashing
- Light Color
- White
- Flash Count
- 2 flashes
- Interval
- 6s
- Raw Code
- Fl W 6s
- Focal Height
- 18m
- Light Range
- 11NM (20.4 km)
- Geographic Range
- 12.7NM
Construction & History
Significant events: 1973 Treaty of the Río de la Plata
Visiting
- Open to public
- Site open, tower closed
Nearby Vessels
Tower & Structure
- Tower Height
- 18m
- Tower Shape
- cylindrical
- Tower Color
- yellow
- Material
- concrete
Structure: round tapered concrete tower with lantern, painted yellow
Location
- Country
- 🇦🇷Uruguay
- Sea Region
- Located on the Barra de San Pedro, a shoal in the Río de la Plata about 8 km north northwest of Isla de Farallón, Uruguay. This light is close to the coast of Uruguay but maintained by Argentina, standing in shared waters under the 1973 Treaty of the Río de la Plata, where both countries share jurisdiction. Argentina maintains navigational aids in this area because the shipping channel leads to Argentine ports on the Río Uruguay and Río Paraná. Uruguay owns the economic rights to the seabed under the lighthouse, and future sedimentation could make the shoal Uruguayan territory.
- Latitude
- -34.4244°
- Longitude
- -57.9606°
References & Identifiers
- Nearest Port
- Colonia(6.3 km)
- Admiralty No.
- G0789
- NGA No.
- 19284
- Wikidata
- Q59281495 →
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