One of the largest lakes in Brazil could become an 800-kilometer waterway to boost exports of soybeans, wood, and rice.

Written by Fabio Lucas Carvalho

Published on 22/05/2026 at 15:30

Updated on 22/05/2026 at 15:31

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The dredging aims to improve navigation conditions, ensuring the depth necessary for the safe passage of vessels. The initiative is part of a broader strategy to enhance the logistical efficiency of the region.

The project is expected to bring significant benefits to the local economy, facilitating the flow of goods and reducing transportation costs. The federal government sees the initiative as a key step in strengthening Brazil’s infrastructure network.

The dredging is part of a set of actions aimed at modernizing the waterway system, which includes the maintenance of existing channels and the construction of new infrastructure to support increased traffic.

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Transboundary lake increases project significance

Lagoa Mirim is located on the border between Rio Grande do Sul and Uruguay. It is the second largest lake in Brazil, behind Lagoa dos Patos, and the largest in Uruguayan territory.

Its watershed covers about 62,250 km². Of this total, 47,310 km² are in Brazil, equivalent to 76%, and approximately 14,940 km² are in Uruguay, corresponding to 24%.

Being a transboundary basin, the regime of shared waters prevails, supported by the Treaty of Limits of 1909 and the Lagoa Mirim Treaty of 1977.

With 185 kilometers in length, an average width of 20 kilometers, and a maximum of 37 kilometers, Lagoa Mirim combines geographical scale and logistical function. Therefore, the waterway was included in the federal strategy to unlock waterway concessions.

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One of the largest lakes in Brazil could become an 800-kilometer waterway to boost exports of soybeans, wood, and rice.

Transboundary lake increases project significance

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