by ian mckenzie » Apr 8, 2010 11:22 am
The 20km long Castleguard Cave floods unpredictably in summer, so trips are normally undertaken at Easter. A 20km ski over the Saskatchewan Glacier gets you to the entrance, then a 1km crawl gets you to the sump at the end of Boon's Blunder. First dived in the mid-1980s, a joint Canadian-UK team put a diver in the sump last year, and returned again this year. This year's exped is now complete, and the sump has now been been successfully passed. 845m long, it emerges into dry, low-angle, 3m wide phreatic tube but no dry exploration was undertaken. A return is tentatively planned for 2012.