Work is set to begin Wednesday on a temporary single-lane bridge on Broad Branch Road over Soapstone Creek in Northwest Washington in an area that has been closed to most traffic since April after a sinkhole opened.

The 13-foot-wide temporary bridge is expected to open in mid-June and remain in place through about July 25 when work on a permanent repair will start and likely continue through mid-September, said John Lisle, spokesman for the District Department of Transportation. The permanent fix is estimated to cost between $600,000 and $750,000 and will require a host of local and federal permits, said Lisle.

DDOT had the temporary bridge in its inventory, Lisle said, and has been testing whether the components work before assembling it at the site. About a half-mile stretch of Broad Branch Road between Brandywine Street and Ridge Road was closed after the culvert collapsed and left holes and sections of the road without underlying support.

Lisle said the department will add new signs and traffic markers as part of its work to train drivers on how to use the one-lane bridge once it opens. Because of the narrow width of the temporary bridge, both cyclists and drivers should use caution — and exercise patience, Lisle said.