Drivers on 14th Street, NW had a morning rush hour surprise, a 51 inch sewer that was damaged caused a huge sink hole, and backing up two northbound lanes of 14th Street, NW between Constitution Avenue and Pennsylvania Avenue, NW are closed due to a sinkhole. Washington D. C. commuters be safe and pay attention to road blocks. If you notice any soft spots or holes in your street call Perma-Liner at our toll free number 866-336-2568 or visit our website at www.perma-liner.com.