HEBER SPRINGS, Ark. – The U.S. Army Corps of Engineers is cautioning boaters and visitors to pay attention to Greers Ferry Lake water levels. While these are normal conditions for late summer reservoir operations, they are low for recreational boaters. The lake is more than 7 feet below top of conservation pool and falling daily as we approach the Labor Day weekend. This has prompted USACE to close several boat launch ramps around the lake.