From the Mount Vernon Triangle CID:
The District Department of Transportation has begun alley construction in the 400 block of K Street bounded by I Street to 4th Street and 5th Street. The construction is scheduled to last three weeks and will start at 7:00 a.m. until 7:00 p.m. Monday through Saturday, weather permitting. The alley reconstruction includes removing the old pavement and pouring a new concrete surface. Access to the alley will not be permitted during construction. If you have questions, call the Project Engineer Matthew Gana at (202) 671-4628.