After an earthquake in Mineral, VA, damaged the massive stone obelisk, extensive repairs were needed. Part of that process involved wrapping the structure in scafolding. Some $15 million dollars and a year later, repairs were finally completed this May (2014).
The government office tasked with knowing the exact coordinates and dimensions of the monument took this as an opportunity to have a survey crew resurvey the monument. When last surveyed in 1999, the monument was 555 feet, 5 1/8 inches.