Reflecting the latter, the company re‐ configured its granite pit plant some five years ago, and recently did the same with its sand and gravel facility – assembling a plant which can be described as operating with "syner‐ gistic interaction." In other words, this well‐thought‐out mix and match of existing, and newly acquired equipment components function to‐ gether to produce an optimum result. Each piece of equipment enhances the productivity of the others and in the end – the whole is definitely greater than the sum of its parts.
To achieve the desired synergies and solutions, Fort McDowell worked closely with KPI‐JCI and its Arizona‐ based dealer, Reuter Equipment. Key components at the heart of the plant consolidation are a JCI Kodiak 400 cone in the secondary circuit; two JCI 6‐ft. x 16‐ft. two‐deck low profile screens; and a JCI 8‐ft. x 20‐ft. triple‐ deck low profile screen outfitted with Polydeck synthetic rubber screen media.
An existing jaw brought over from the granite pit is the primary. Ulti‐ mately the new plant setup allows Fort McDowell to double tons‐per‐ hour capacity and efficiently pro‐ duce a greater volume of high‐quality spec products – while taking two other cones offline and eliminating three loaders. Conse‐ quently, they are able to significantly decrease labor, fuel and mainte‐ nance costs. "It's a do‐more‐with‐ less situation and the savings are tremendous," said Jondahl.
Going Underwater Material is mined underwater at a depth of 30 ft. The plant is fed with two feeders, one for fines and one for coarse materials. Combined with the jaw, Kodiak cone, and multiple screens, Jondahl says that the new plant configuration allows them to dial in their gradations, and remain flexible in the production of a vari‐ ety of specification products, which include various base materials, a #57 blend, a 1‐ to 3‐in. and 3‐ to 6‐ in. natural river rock, and particu‐ larly, a 1‐1/2‐in. rock with a 98‐percent fractured face.
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The plant features a mix and match of existing and newly acquired equipment components.
The new plant setup allows Fort McDowell to double tons-per-hour capacity.
They are able to significantly decrease labor, fuel and maintenance costs. ROCKproducts • OCTOBER 2011 15