HEBER SPRINGS, Ark. – The Corps of Engineers will close both lanes of Highway 25 across Greers Ferry Dam from 7 a.m. until 7 p.m. April 15 and 16, weather permitting, to install equipment needed to refurbish the tainter gates. However, one lane will open each night from 7 p.m. until 7 a.m. Alternative route will be Highways 16 and 92 around the west side of the lake.