In 2008, Congress passed the America's Beautiful National Parks Quarter Dollar Coin Act. This legislation called for 56 coins, one for each state or other jurisdiction, to be issued five per year beginning in 2010 and concluding in 2021. Each coin features a National Park Service site, one to a jurisdiction. Flanagan's head of Washington was restored to bring out detail. In addition to the circulating pieces and collector's versions, bullion pieces with 5 troy ounces (155 g) of silver are being struck with the quarter's design.