Eastbound U.S. 50 in Dayton is down to one lane starting this week as the Nevada Department of Transportation repairs a depression or “sink hole” in the highway.  NDOT has been  monitoring a 15 foot section of the roadway, directly east of Dayton Valley Road which has been sinking, creating dips in the driving surface. Ground-penetrating radar was used and bores of the underground surface made to evaluate the sinking section of earth underneath the roadway, potentially created by localized underground water erosion. Although there is no anticipated threat of the roadway sinking further, one eastbound lane is closed to help drivers avoid the bumpy road surface.  In coming weeks, NDOT plans to repair the depression.