National Geographic : 1987 Jan
rescuers,a few seals were aided. One that had crawled partway across the glacialmoraine is carriedthe remaining distance (right) to Disenchantment Bay. Other seals traversedthe dam some 90 feet high and about a quarterof a mile wide-and rescued themselves, before the rock and ice gave way to free all the trapped sea life. Residents of nearby Yakutat, where Tlingit Indians still hunt seals, were far more concerned that the lake might spill over into the Situk River and destroy spawninggrounds on that world-famous fishing stream. Geologic evidence indicates such a past occurrence, along with the Hubbard's long cycle of advance and retreat (map, above right). Dotted lines show the glacieronce filled not only Russell Fiordbut all of Yakutat Bay.