REPUBLICAN CITY, Neb.,— To allow for the contractor, BCI Construction, to complete the placement of the stop logs on the upstreams side of the Harlan County spillway, the U.S. Army Corps of Engineers at Harlan County Lake will extend the current closure of the dam through Mar. 31. During this period of time, both lanes of the dam will be closed from 6 a.m. to 6 p.m. daily and traffic will be directed to take the designated detour.