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.
If your state law allows a longer period of time in which to file claims, that period of time will take precedence over the Magellan standard of 60 days. Extended filing time is also allowed for member submitted claims and coordination of benefit (COB) claims where Magellan is the secondary payor.