Cascade Mine (Snowdrift Mine), Twelvemile Arm, Kasaan Bay, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USA : Location: The Cascade Mine is probably about 0.2 mile northwest of the center of section 1, T74S, R83E and 1.6 miles SW of the Puyallup Mine (CR103), which is named on the USGS 1:63,360-scale .