On a prominent hill visible from much of downtown Nashville, a stone reservoir with a capacity of 51 million gallons peeks above the surrounding tree-filled park. Completed in 1889, currently only used at half capacity but still the largest such serving Nashville. Many passersby see it daily yet few are aware that it was the site of a major disaster. Just after midnight on the 5th of November, 1912, the ground under the base of the reservoir’s 22-foot thick wall gave way. The breached wall released millions of gallons down the…