The greater availability of transportation allowed mining operations to expand more quickly, and lower grades of gold ore could be shipped out more economically for processing in smelters at Pueblo or Denver.
Lower grades of gold ore could readily be shipped out more economically for processing in smelters at Pueblo or Denver. The greater availability of transportation allowed mining operations to expand more quickly.
The greater availability of transportation allowed mining operations to expand more quickly. Lower grades of gold ore could readily be shipped out more economically for processing in smelters at Pueblo or Denver.
The greater availability of transportation allowed mining operations to expand more quickly. Lower grades of gold ore could readily be shipped out more economically for processing in smelters at Pueblo or Denver.