ok, in this situation it is Concrete Work, Hard Road. the 7871 code is for contractor type work for the state. So, his occupation as a laborer puts him either as a contract laborer or as a job to job type of work. he is listed as W not O, so he is a wage worker not an owner operator. He either works for the State or City, fills potholes in paved roads and repairs the roads that are in place.