CRH AmericasSurvey Tech CRH AmericasSurvey TechMuskogee, OKAPAC Central Inc., is a CRH company producing and providing crushed aggregate materials, sand, ready-mix concrete, asphalt, and performing as a regional heavy highway/infrastructure construction firm serving Arkansas, Oklahoma, and southern Missouri. You’ll collaborate with experienced professionals, leverage cutting-edge GPS and surveying technology, and ensure projects are executed safely and accurately, every time.