On June 10, the river crested to the second-highest level in history at the official gauge in Chester, at 46.52 feet, according to the National Weather Service, behind only the 49.74-foot mark on Aug. 7, 1993. Kaskaskia was nearly destroyed when the levee broke during the record flooding of 1993, but in recent years, the river has reached the third (45.99 feet in 2016) and fourth (44.66 feet in 2017) highest flood levels in history. At about 36 feet, the Old Channel Road is underwater, cutting off the island from the mainland, and anything above 27 feet is considered flood stage. As of Tuesday, the river still was at a height of 39.31 feet.