nced again 500 years later. Since 1895, this secentry-mile-long river of ice has been
flowing steadily toward the Gulf of Alaska at a rate of approximately 200 feet per year. In
June 1986, however, the glacier surged ahead as much as 47 feet a day. Meanwhile, a
western tributary, called Valerie Glacier, advanced up to 112 feet a day. Hubbard’s surge
(15) closed off Russell Fiord with a formidable ice dam, some 2,500 feet wide and up to 800
feet high, whose caged waters threatened the town o