Shelbyville dam main road to close SHELBYVILLE — The U.S. Army Corps of Engineers will close the road across the main dam at Lake Shelbyville to all vehicle and pedestrian traffic from 7 a.m. until 5:30 p.m. on Tuesday through Thursday. The road will cose, weather permitting. The dam road will re-open for normal traffic Friday. This closure is necessary to provide safety while maintenance is being performed on the main dam. A drilling crew from St. Louis has been drilling piezometer wells around the main dam. For more information call the Lake Shelbyville Management Office at 774-3951. I was told that there is a lot more to this story than is being let out to the public....the lake is 14 foot above normal summer time pool..