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Company Name
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Plant Name
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Subsidiary
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City
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State/Province
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| LaFarge Holcim | Texas | Aggregate Industries MAR | Cockeysville | Maryland | | Chaney Enterprises | Sparrows Point | | Sparrows Point | Maryland | | Chaney Enterprises | Seat Pleasant | | Seat Pleasant | Maryland | | Chaney Enterprises | Bishopville | | Bishopville | Maryland | | Chaney Enterprises | Westport | | Baltimore | Maryland | | Chaney Enterprises | Annapolis | | Annapolis | Maryland | | Chaney Enterprises | Queenstown | | Queenstown | Maryland | | Chaney Enterprises | Calvert | | Prince Frederick | Maryland | | Chaney Enterprises | Owings | | Owings | Maryland | | Chaney Enterprises | King George | | King George | Maryland | | Chaney Enterprises | Hollywood | | Hollywood | Maryland | | Vulcan Materials | Edgewood | | Edgewood | Maryland | | Thomas, Bennett & Hunter, Inc. | Frederick Plant | | Keymar | Maryland | | Rockville Fuel & Feed Co, Inc. | Rockville | | Rockville | Maryland | | Rockville Fuel & Feed Co, Inc. | Frederick | | Frederick | Maryland | | Rockville Fuel & Feed Co, Inc. | Elkridge | | Elkridge | Maryland | | Rockville Fuel & Feed Co, Inc. | Beltsville | | Beltsville | Maryland | | Thomas, Bennett & Hunter, Inc. | Westminster Plant | | Westminster | Maryland | | Thomas, Bennett & Hunter, Inc. | Hagerstown Plant | | Hagerstown | Maryland | | Vulcan Materials | Brooklyn | | Baltimore | Maryland | | Howlin Concrete Inc. | Hollywood Plant | | Hollywood | Maryland | | LaFarge Holcim | MAR La Plata (RM) | Aggregate Industries MAR | La Plata | Maryland | | Howlin Concrete Inc. | Owings Plant | | Owings | Maryland | | Howlin Concrete Inc. | Mechanicsville Plant | | Mechanicsville | Maryland | | Vulcan Materials | Finksburg | | Finksburg | Maryland |
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