The SSC Collider Ring represents the dominating cost element of the SSC project. The number of variables involved in optimizing the facility is very large so it is helpful to try to parameterize them in a way that allows a straightforward comparison of primary options. Cost information has been drawn from the Reference Designs Study supplemented by data from studies carried out by the Harza Engineering Company in Illinois. Various studies indicate that a 9' to 10' tunnel seems optimal from a construction and operation viewpoint and is adequate for installation. According to both studies cited a tunnel of this size in reasonable geology will cost approximately $800 per linear foot. For the purposes of this analysis this is adopted as the standard tunnel.