Pipelines or other oil/gas transportation projects have been at least half of my career.
http://books.google.com/books/about/Titan.html?id=Mleb5acWQF4C
Titan: the life of John D. Rockefeller, Sr
by Ron Chernow
Supposedly, this is the definitive bio of John D. However, Chernow still does not give him his due, imo.
Rockefeller saved more whales than all the bunny huggers put together ever did. He produced and marketed a superior illuminant at an inexpensive price - kerosene - and put the whale hunting industry out of business.
His single-minded business purpose was to improve his production and distribution process with the intent of providing superior products at the most economical prices possible, thereby benefiting the customer.
He was IMO the greatest businessman ever.