The initial cost for a formwork system may be deceiving when one is controlling the cost of the forming process. The initial cost for purchasing a set of five or six tunnel forms is approximately half of $1 million. Although this may be much higher than the cost of conventional forms, the all-steel formwork construction allows the number of reuses to be anywhere from 500 to a 1000. This allows the contractor to reuse the forms on similar projects, thus reducing the costs for each use of the forms. Once the forms begin to wear and deteriorate, rehabilitation of the forms can be accomplished for approximately $100,000. This increases the life and number of reuses of the forms.