After the War of 1812, the federal government decided to fortify Pensacola and Pensacola Bay. It built the Navy Yard west of the city in Warrington, starting in 1828 (this was redeveloped in the 20th century as Naval Air Station Pensacola). It completed construction of Fort Pickens in 1834 at the western end of Santa Rosa Island; completed Fort McRee in 1839, and completed redesign and expansion of Fort Barrancas in 1844, to add to defenses.
Following the Deepwater Horizon oil spill (called the "Gulf oil spill"), the government and BP planned to close the entrance to Pensacola Pass with a floating barrier system in June 2010, to control tidal flow of oil entering from the Gulf of Mexico. The daily high tide was causing oil-contaminated water to enter Pensacola Bay. Such a barrier system is designed to allow boats to travel through Pensacola Pass during the outflowing tide, but to close during the rising tide.
The booming plan was never carried out. The Pass was only boomed for a day due to strong currents which broke the boom. No other plan was in place in areas of less current nor was there a plan to trap incoming oil. Oil product entered the pass.