Jeff and Chris,
Sterne's Spur was discussed here:
http://c-sng-discussion-forum.254.s1.nabble.com/Freight-trains-at-Dillon-or-Keystone-td1868i80.htmlThe spur connected to the Keystone Branch, just east of the crossing of the Blue River on the iron truss bridge, and ran back to the northwest. Best I can tell, the terminus was just below the east end of the current dam. While a power house is indicated connecting to the trestle at the end of the spur it is not clear who owned the "power house".
One possibility was the Oro Grande Placer Mining Co. discussed here:
http://c-sng-discussion-forum.254.s1.nabble.com/Freight-trains-at-Dillon-or-Keystone-td1868i100.htmlOro Grande was involved with "pit" mining of the gravels of the Blue River near the end of Sterne's Spur, a contemporary of the Gold Pan Pit in Breckenridge. The pipe for the pipeline and penstock, that supplied water pressure for the operation, was likely fabricated at the Gold Pan Shops and moved to the Oro Grande operation by the C&S.
So, Silverthorne actually did have C&S NG rail service, but long before it was Silverthorne.
Jim Courtney
Poulsbo, WA