The Kerr-Sulphurets-Mitchell (KSM) mine project is a copper, gold, silver and molybdenum deposit in British Columbia proposed for development by Toronto-based Seabridge Gold (TSX:SEA) (NYSE:SA), a junior mining company which holds a 100% interest in it. The proposed mine would be 35 km (22 miles) from the international border, just upstream from Misty Fjords National Monument in Alaska. KSM is a massive project comprised of four deposits that would be mined as a combined open-pit and underground block-cave mine. The operation would be in two locations connected by twin 23-km (14 mile) long tunnels – extending under a glacier – which would transport miners and ore between the pits and the mill and tailings impoundment. It is expected to process between 120,000 to 180,000 tonnes of ore per day over a mine life of 55 years. Opposition to the project has increased, with some analysts comparing it to the proposed Pebble Project in southwest Alaska.