what county is rough river lake  kentucky
â¢ Surface Area: 5,100 Acres. Rough River Lake is a 5,100-acre (21 km2) reservoir in Breckinridge, Grayson, and Hardin counties in Kentucky. It was impounded from the Rough River in 1959 by the United States Army Corps of Engineers. Rough River Lake Dam is a 132-foot-high earthen dam impounding a maximum capacity of 334,400 acre-feet. It is the primary attraction of Rough River Dam State Resort Park.