 They noticed the unusual trout and by 1912 had transplanted them above Llewellyn Falls which had originally been the upper limit.This is fortunate because by 1924 hybrids with ordinary Lahontan cutthroat and introduced rainbow trout (cutbows) were found below Llewellyn Falls, either due to ill-considered stocking or barriers in the gorge washing out.Since the finite and localized population of Paiute cutthroats was vulnerable to forest fire and angling as well as hybridization, relatively unhybridized Paiute cutthroats from upstream were transplanted into virtually all available tributaries of Silver King Creek above the gorge, into Stairway and Sharktooth Creeks to the south in the Sierra Nevada, and into Cottonwood Creek and Cabin Creek in the White Mountains.