mine in Iowa

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Metso Minerals Inc

Wright Brothers Boulevard West 805, 52404 Cedar Rapids, United States

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Linwood Mining & Minerals

Victoria Avenue 5401, 52807 Davenport, United States

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Karges-Faulconbridge, Inc.

South Linn Street 332, 52240 Iowa City, United States

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Engineering Hall

Southwest Road 1000, 53818 Platteville, United States

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Clinton Engineering Co

Lincoln Way 2101, 52732 Clinton, United States

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Universal Engineering Corporation

1st Avenue Northwest 800, 52405 Cedar Rapids, United States

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WesTech Engineering, Inc.

Arrasmith Trail 600, 50010 Ames, United States

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ESCO Automation

Hubbell Avenue 4905, 50317 Des Moines, United States

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GSI Engineering, LLC

Northwest Urbandale Drive 4450, 50322 Urbandale, United States

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Continuous Control Solutions

Aurora Avenue 11275, 50322 Urbandale, United States

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Magner Jeffrey

Southwest 7th Street 600, 50309 Des Moines, United States

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Terracon Consultants, Inc.

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Polk County Public Works

Northeast 14th Street 5885, 50313 Des Moines, United States

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SEH - Des Moines

Northwest 88th Street 5414, 50131 Johnston, United States