Thanks for the comprehensive info, Shay. Since Utah Railway ran on trackage rights on D&RGW from Utah Railway Jct. to Thistle -- the majority of the main line movement for most of their tonnage between Martin and Provo -- it's most likely the gons met their fate there, and not somewhere else on Rio Grande.
The major customers for Utah coal in the steam era were:
- Domestic heating in Utah, Nevada, and Idaho, with smaller markets in Washington and Oregon, competing with Wyoming coal moving west, Washington coal moving east, and fuel oil from California moving north.
- Sugar refineries in Utah, Idaho, and Washington
- Smelters, in conjunction with fuel oil, most of them were a mix of approximately 75% fuel oil, 25% powdered coal
- Locomotive fuel in coal-fuel territory in Utah, Idaho, Montana, Oregon, Washington, and Nevada
Utah coal mined on D&RGW and Utah Railway mines was typically a high-volatile, low ash, low-sulfur, low-moisture bituminous, running around 12,000 BTU per pound. Excellent for steam, residential heating, and industrial use, but not a good coking coal at all.