A construction crew damaged a gas line at the Intersection of Greenwood and Dempster. Estimates for repair are approximately eight hours and traffic is expected to be heavy. Drivers should expect delays through that area well into the rush hour. Updated at 1:15 pm north bound Greenwood the curb lane is closed and South Bound Greenwood the center lane is closed between Greenwood and Ballard. Only one lane of traffic is open in both directions.