And it is NOT the Pacific, but the Atlantic.
During a state visit today (Monday) to Montevideo, Evo and Tabaré Vázquez reached an agreement in principal in which Uruguay will allow Bolivian exports to the Atlantic via the Uruguay River. The foreign ministers of both countries were instructed to come up with a formal treaty as soon as possible.
The deal will allow Bolivia to use the river port of Nueva Palmira and the port of Montevideo to export, among other things, iron, manganese and other products to the Atlantic. Bolivia will have Free Port priviledges.
(Uruguay river, 1,000 miles (1,610 km) long, rising in South Brazil and flowing in an arc West, Southwest, and South to the Río de la Plata, an estuary; it forms part of the Brazil-Argentina border and most of the Argentina-Uruguay line.)
http://abi.bo/index.php?i=noticias_texto_paleta&j=20090713232427&l=200907130066_El_presidente_Evo_Morales,_antes_de_partir_de_Montevideo,_en_la_ciudad_andina_de_Patacamaya_(JL_Quintana,_ABI)