The 1985 Election day floods were notable in Grafton. Most of the 47 people killed in this incident were in Pendleton and Grant counties, according to the National Weather Service. Flooding in the Tygart Valley River basin (a tributary to the Monongahela River) set new records for peak discharge at all five of the long-term unregulated gauging stations in the basin. However, the peaks were not as extreme, relative to the previous peaks of record, as those in the Cheat River and South Branch Potomac River basins. Recurrence intervals for the peaks equaled or exceeded 50 years at all five of the aforementioned sites in the Tygart basin, and four were in excess of 100 years. Also, at one newly established gauging station, Three Forks Creek near Grafton, the peak discharge, 12,000 ft3/s, was estimated to exceed the 100-year recurrence interval.