Maybe not up that far but below did receive many stockings .
Lower Letort Designated Class A Effective February 18, 2006, the PA Fish and Boat Commission (PFBC) approved the addition of 3 miles of Letort Spring Run, from Post Road Bridge downstream to the mouth at the Conodoguinet, to its list of Class A Wild Trout
www.pacvtu.org
"In 1981 a sewage treatment plant discharge was relocated from Letort Spring Run to Conodoguinet Creek. Surveys in 1984 and 1985 documented a low-density wild brown trout population that was not capable of sustaining a significant fishery. CVTU members then annually stocked 9,000 fingerling brown trout provided by PFBC. By 1999 water quality and habitat had recovered, and brown trout reproduction was sustaining the population, therefore the fingerling stocking ended."
...By now the Letort fish are a hodgepodge of genetics.
Any know how many Loch Levens were "purloined" from other nearby watersheds?