Argos Puerto Rico Corp.
Dorado Plant
Dorado, PR

Ash Grove Cement Company, a CRH Company
Durkee Plant
Durkee, OR

Ash Grove Cement Company, a CRH Company
Hunter Plant
New Braunfels, TX

CalPortland Company
Rillito Cement Plant and Quarry
Rillito, AZ

Cemex USA 
Lyons Cement Plant
Longmont, CO

Continental Cement, a Summit Materials Company
Davenport Plant
Buffalo, IA 

GCC 
Odessa Plant
Odessa, TX

Heidelberg Materials
Bellingham Grinding Plant
Bellingham, WA

Heidelberg Materials
Logansport Cement Plant
Logansport, IN

Heidelberg Materials
Speed Cement Plant
Sellersburg, IN

Martin Marietta Materials
Midlothian Cement Plant
Midlothian, TX