If the responsibility for the U.S. Army Corps of Engineers office in Puerto Rico was a dance, it would probably be closer to the currently popular “Harlem Shuffle” than a salsa. Though responsibility for the office was shuffled over the years from New York to Panama, then to Puerto Rico, and finally to Jacksonville District, the importance of having a Corps office located on the island has never shifted. Corps civilian and military activities in Puerto Rico include administration, coastal defense projects, facilities construction on military bases and flood risk reduction, as well as maintenance and improvement of inland waterways and harbors. Specific navigation projects have included Arecibo Harbor, San Juan Harbor, and Mayaguez Harbor in Puerto Rico.