Reader M., who keeps a better eye on the Monument Half Street web cam than I do, has passed along the word that, within the past week, the Half Street Hole (just north of Nationals Park) has started being re-filled with dirt, except for the far northern portion where additional underground garage space next to the 55 M Street office building is being completed. The small piece of garage construction is where a new street dubbed "Monument Street" has been planned, to connect Half to Cushing Street to the east; doing this work also will now give southern walls to the 55 M garage. The rest of the block is where Monument had plans for a 200-room hotel and 340 residential units, along with lots of ground-floor retail. I don't know anything beyond what I'm seeing on the webcam, so we'll have to wait to find out What This Means (though certainly filling back in a three-story hole isn't particularly likely to indicate a project moving forward).