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FEATURE The latter product is crushed and sized from 6‐in.‐plus rock that is scalped and stockpiled. "Prior to the new plant, we were never able to make a 1‐ to 3‐in. and a 3‐ to 6‐in. river rock, and we had to have a totally separate plant to make the 1‐1/2 in. rock. So we always had to use costly loaders to transport material to other crush‐ ing and screening plants," Jondahl added. The new plant also features a radial stacker that allows the operation to feed a surge tunnel for wash plant ma‐ terial stockpiling. "We can easily switch over to the wash plant as needed. In fact, we can outrun our wash plant as it only takes about four hours to stockpile wash material with the crushing spread," said Jondahl. Impor‐ tantly, he stresses that in the past – and even with more equipment – the operation was only able to achieve a capacity of 300 to 400 tph. "Now we are consistently able to get up to 900 tph." Kodiak Cone Jondahl attributes much of their new efficiencies to the Kodiak 400 cone. "First, the Kodiak has an automatic re‐ lief system. Should we have a plug, I don't have to have workers in harm's way trying to clear it out. We just steadily run throughout the shift," Jondahl said. "Next, we have the benefit of cutting back on the maintenance man hours that were required before when we ran a smaller 1140 cone plant. Anywhere from two to three times per week, our crew had to come in and tighten down the old cone – which was a two‐hour process. With the Kodiak we can adjust everything on the fly, which keeps us dialed in on our rock. For example, when we are making our 1‐1/2‐in. rock, we achieve 85 percent from 1‐1/2 in. to 1‐1/4‐in.; and 15 percent from 1‐1/4 in. to 1 in. Those are specs that no other opera‐ tion in our area is able to hit." As to the new horizontal screens, Jondahl says that they deliver significant flexibility and reliability. According to KPI‐JCI engineers, this optimum application flexibil‐ ity is the result of the unit's adjustable oval motion length and timing angle. Additionally, each model offers standard, medium or heavy‐duty scalping configurations. And importantly, the inclusion of a triple‐shaft vibrating mechanism pro‐ vides maximum resistance to blinding and plugging, while also ensuring longer bearing life. having two 6-ft. x 16-ft. screens allows product flexibility. These kinds of tools make us good at what we do," said Jondahl, adding that their ability to hit such high product standards has enabled them to supply the re‐ gion's biggest corporations with a large percentage of the concrete rock they require. Lastly, Jondahl said that when completing major plant upgrades, he looks for teamwork. "I may buy what a "Having our 8-ft. x 20-ft. screen allows us to scalp the way we wish to; and The new plant also features a radial stacker that allows the operation to feed a surge tunnel for wash plant material stockpiling. 16 ROCKproducts • OCTOBER 2011 www.rockproducts.com