HEBER SPRINGS, Ark. – The Corps of Engineers will close both lanes of Highway 25 across Greers Ferry Dam, weather permitting, from 8:30 a.m. until 7 p.m. Aug. 21 and again on Aug. 22, if needed, to install equipment on Greers Ferry Dam. During the closure equipment will be reinstalled to resume tainter gate maintenance that was interrupted because of high water earlier this year. Alternative route will be Highways 16 and 92 around the west side of the lake.