Emergency officials were on the scene to investigate gas leak along Highway 275 on the edge of Ewing on Thursday morning.
Ewing Fire Department was working traffic control near Two Rivers Motel on the east side of Ewing.
Black Hills Energy crews were investigating the issue on both sides of Highway 275.
Black Hills Energy Community Affairs Manager Brandy Johnson reported that the investigation concluded that there was not a natural gas leak, but rather a leak of methane of a sceptic drain.
Elkhorn Rural Public Power was also on scene.