road sign detour. workers paving urban highway engineering

accident basement building city communications conduit connect construction contractor crane damaged danger development dewatering digger digging ditch drainage engineering equipment excavation excavators float gas hardware heating hole immersion industrial industry infrastructure installation large leaky major modern new object operations outdoors pipeline pipes plastic plumbing pump repair replacement road rusty security sewer sewerage shovel street suction supply technologies trench trenches underground urban utilities water waterproofing welding work