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3. Mill area
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At 16 level, the ore train would dump rock into the large pit (Grizzly) at the bottom of which was located a jaw crusher. The crusher would send the ore into the ball mill and rod mill where the ore was pulverized to a fine powder.
Inside the ball mill, there would be ore and steel balls, approximately 10 in. in diameter. As the mill rotated, the ore was crushed by the balls. Eventually, the balls would wear down and Bob Riggle remembers his dad...
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Documenting the landslide onto the D&RG tracks in Eagle River Canyon. The numbers on the photo correspond to the descriptions below. The old mill is at far right.
Verso: "1. New House Station on tram; 2. Eagle River; 3. Slide on D&RG; 4. An old mill, note the cribbing underneath the building" [written by Tom Knight]
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Documenting the landslide onto the D&RG tracks in Eagle River Canyon. The numbers on the photo correspond to the descriptions below.
Verso: "1. Compressor house; 2. Tram landing; 3. New House tunnel station on tram; I am working on a level with the New House Tunnel, but about ½ miles in the Mtn. Notice how steep the tram is; it's steeper yet before it reaches Gilman." [written by Tom Knight]
8. Ore cart
10. Fine crusher
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The rod and ball mill. The rod mill is on the left and ball mill on the right. These were used to grind the zinc concentrates for additional chemical processing. Prior to this, the material had chemical agents added to allow the zinc mineral surface to adhere to flotation bubbles. These were some of the steps for making the zinc ready to ship in railroad cars.