The Inter-American Development Bank (IDB) has approved a US$40 million loan that will allow for bidding to begin for the Agua Negra tunnel, which will connect San Juan province in Argentina with that of Coquimbo in Chile. The tunnel is key to improving trade integration between the two countries and the rest of Mercosur through a new corridor that will connect the Atlantic and the Pacific from Porto Alegre, Brazil, west to Coquimbo, Chile.