In 1937 the Chilean Government ordered the construction of a canal through the isthmus in order to open a direct passage from the Moraleda Channel to the Messier Channel and avoid going out into the open Pacific Ocean to get around the Taitao Peninsula:
a 2,200 m long, 17 m wide, 5 m depth Canal between the Laguna San Rafael and the Negro River to connect then the
Negro River (25km).
The work began in 1937 under the management of the railways department of the Ministry of Public Works. Work continued until May 1943 when funds ran out.