From an AMARC visit in early October 1994, this is the Sikorsky CH-54A Tarhe serial 67-18415 pcn HG 001 last operated by Co D 113th AVN / NV ARNG. She entered AMARC September 1992 and left July 1995 to Erickson Crane, OR. A remarkable flying machine.
The U.S. Army named the helicopter Tarhe, but most people call them Skycranes. The CH-54 served through the last years of the Vietnam War and finally left military service in the early 1990s. Many Skycranes still in use by many companies!