Agents plan to be on the scene when the remains of the building are demolished sometime in the next two weeks, he said.
In the weeks after the blasts the remains of the hotel were demolished.
The remains of the mill were demolished in 2000.
The remains of the long-distance platform was demolished in 1970.
The remains were then demolished and the site cleared for use as a community park.
The remains of the old building were demolished and cleared by 1790.
The remains of the church were demolished when the fort was constructed in 1867.
The remains of the control tower were demolished in August, 2010.
The remains of the maintenance buildings were demolished in late 2010.
In the middle of the 16th century the remains of the second story were demolished for defensive needs.