excavators machine on a construction site assembly a huge mold with reinforcement mesh for concreting

activity architecture area backhoe bagger bucket builder building bulldozer construction constructionvehicle contractor dig digger dirt earthmover eathmoving engineering equipment excavate excavating excavation excavator extraction gravel heavy heavyduty hydraulic industrial industry infrastructure machine machinery operate publicworks puddle roadwork sand scoop shovel site soil structure tractor transport under vehicle water work worker