Costa Rica–Nicaragua San Juan River border dispute President Laura Chinchilla was criticized by former President Óscar Arias for her naïve handling of the situation. On November 18, 2010, Costa Rica filed proceedings against Nicaragua in the International Court of Justice. The complaint alleges an incursion into, occupation of and use by Nicaragua's Army of Costa Rican territory, breaches of Nicaragua's treaty obligations toward Costa Rica, and “ongoing and planned dredging and the construction of the canal (that) will seriously affect the flow of water to the Colorado River of Costa Rica, and will cause further damage to Costa Rican territory, including the wetlands and national wildlife protected
Costa Rica a country that is geographically and culturally much nearer to Costa Rica?" Arias announced that both countries would exchange ambassadors. Costa Rica has a long-term disagreement with Nicaragua over the San Juan River, which defines the border between the two countries, and Costa Rica's rights of navigation on the river. In 2010, there was also a dispute around Isla Calero, and the impact of Nicaraguan dredging of the river in that area. On 14 July 2009, the International Court of Justice in the Hague upheld Costa Rica's navigation rights for commercial purposes to subsistence fishing on their side of the