books.google.com.au - This practical manual can help you develop the skills needed to succeed as an underground utility contractor: -- Getting the Job: Finding work you should bid, reading plans and computing quantities figuring realistic productivity rates, estimating unit costs, bidding, adding your overhead and profit,...http://books.google.com.au/books/about/Pipe_and_Excavation_Contracting.html?id=SJxE3N8J6VsC&utm_source=gb-gplus-sharePipe and Excavation Contracting
