Although the fort today is substantially similar to the original construction, some changes have been made. Starting in 1863, under the supervision of Thomas J. Cram, the walls of the fort were reconstructed, replacing the original cedar facing with brick and concrete. In addition, the entranceway to the fort has been altered. The original entrance to the fort was a small sally port in the southeast bastion. In 1938, an arched entrance was constructed through the fort's walls to accommodate vehicular traffic; later, the arches were removed to fit larger trucks.