In a nutshell, acid mine drainage is a form of water pollution that happens when rain, runoff, or streams come in contact with rock that is rich in sulfur. As a result, the water becomes very acidic and damages downstream aquatic ecosystems. In some regions it is the most common form of stream and river pollution.
Probate in Washington typically takes six months to a year, depending on some choices the executor makes (discussed below). It can take much longer there is a court fight over the will (which is rare) or unusual assets or debts that complicate matters. Unless there is a dispute, it's mainly a matter of filing paperwork.
In Washington State registered entities are due to file the annual report by the last day of their anniversary month. We do not have an alternate date process, but they can file the annual report up to 6 months in advance of the due date. For example filed on 03/08/2012 would be due by 03/31/13.