Loudoun county officials are against Dulles Metro Station's plans for an underground railway, stating that it's too costly. Officials are pushing for the plans to be changed to an above ground station.
The blasting will occur mostly in the overnight hours and should be fairly quiet with minimal noise. You'll know it's coming because before the event there will be three short audible signals if it's a daytime blast, or an amber-colored strobe light that will be seen for about 15 seconds at night.
The site of the blasting is immediately across from the station entrance on North Moore Street. For the most part in the beginning the explosions will be at night, but then move to the daytime hours a few months from now.