The CCGS Samuel Risley is a Canadian Coast Guard icebreaker and buoy tender assigned to the Upper Great Lakes area (Central and Arctic Region). Named after the 19th century maritime inspector Samuel Risley (1821-?) for Upper Canada and Ontario, she is a light icebreaker with a capability to break ice up to two feet (600 mm) thick. Based in the Great Lakes, CCGS Samuel Risley is responsible for keeping an ice-free passage between Port Colborne, Ontario and Thunder Bay, Ontario. The vessel has a tall foredeck, and a long low quarterdeck, for carrying buoys, where a crane is permanently mounted.