From an email update:
The construction of the new westbound Lesner Bridge has reached a point where we are about to cross the federal channel.
At this point in construction we will be temporarily closing the channel at various times during the day to allow construction vessels to load/unload material and equipment up to the center span of the bridge (span #5). Boaters should expect and plan for these periodic channel closures beginning this week and extend at least until the week of March 14th 2016.
Over the next several weeks the bridge contractor will cantilever out 8 segments in span 5 from Pier #4 (west side of the channel) and then launch the gantry over to Piers #5 and #6 (east side of the channel) and build out span 6. The U.S. Coast Guard, Virginia and Maryland Pilots Association have also been made aware of these intermittent closures.
We apologize for this inconvenience and appreciate your patience as we work in and around the federal channel during the month of March 2016.