DUBUQUE, Iowa (AP) — A sinkhole will continue interfering with traffic in downtown Dubuque for about another month. The Dubuque Telegraph-Herald reports city officials estimate that it will take that long to figure out what is causing the hole under a lane of White Street downtown and fix the problem. A lane of traffic has already been closed for several weeks because of the issue.

City Engineer Gus Psihoyos says fixing the sinkhole will be a big ordeal. City officials are also evaluating another sinkhole on private property to make sure it won’t threaten city infrastructure. But ultimately the homeowners are responsible for filling that sinkhole.