Mystery C&S location No. 1

A few months ago I bid on a number of slides taken on various remains of the C&S.  A number were from the Alpine Tunnel area post-abandonment (I'm guessing they're from the 1950s or 1960s). I'll post these eventually.  However, since the slides did not provide specifics about exact locations I was wondering if I might get some help from others with the ones I cannot identify.  They may or may not be related to the Gunnison extension.

Can you identify the following location?