Guanajibo River

The Guanajibo River (Río Guanajibo) is a river that runs through Hormigueros, Cabo Rojo, Mayagüez, San Germán, and Sabana Grande in Puerto Rico.

Flood control project
In mid 2018, the United States Army Corps of Engineers announced it would be undertaking a major flood control project of the river, with a $60 million budget.