Greentree Transportation Company is a full service specialized and heavy haul transportation company. GTC serves the following industries: Oil/Gas - Wind Energy (Blades, Schnabel's, Deck Work) - Project freight - International Ocean and Air - Thru services between US, Mexico and Canada - In House Engineering Services - Crane and Rigging - Long term/Short Term Laydown yards. Along with our sister companies, we also offer Flatbed, Step Deck and Conestoga trailers.