In 1972, Hurricane Agnes passed over the area. The hurricane caused so much rain that the lake level rose above the top of the dam by . This resulted in the lake overflowing and eroding the western, earthen shoulder of the dam. The rush of water deepened the washout, but the slow erosion protected downstream interests from the wall of water that would have resulted from a total dam collapse.
In 1972, Hurricane Agnes passed over the area. The hurricane caused so much rain that the lake level rose above the top of the dam by  This resulted in the lake overflowing and eroding the western, earthen shoulder of the dam. The rush of water deepened the washout, but the slow erosion protected downstream interests from the wall of water that would have resulted from a total dam co.llapse.