1902 Arbitral award of the Andes between Argentina and Chile

The Cordillera of the Andes Boundary Case
Map of the territorial changes made after the 1902 Andes Boundary Case.
TypeBilateral treaty
Signed20 November 1902 (1902-11-20)
Original
signatories

The 1902 Arbitral award of the Andes between Argentina and Chile (Spanish: Laudo limítrofe entre Argentina y Chile de 1902) was a British arbitration in 1902 that established the present-day boundaries between Argentina and Chile. In northern and central Patagonia, the borders were established between the latitudes of 40° and 52° S as an interpretation of the Boundary treaty of 1881 between Chile and Argentina.

As result of the arbitration, some Patagonian lakes, such as O'Higgins/San Martín Lake, became divided by a national boundary. Additionally the preferences of settled colonists in a cultivated part of the area in dispute had been canvassed. The boundary proposed in the arbitration was a compromise between the boundary preferences of the two disputing governments, which strictly followed neither the alignment of highest peaks nor the fluvial watershed, and was published in the name of King Edward VII.