This paper presents a benefit/cost analysis for different alternatives considered as remedial actions to reduce potential health hazards associated with radioactive uranium tailings remaining at a dismantled mill in Salt Lake City, Utah, U.S.A. The analysis was carried out in two phases. Phase one considered: (1) the health hazards associated with each of the alternatives over various future time periods; (2) parametric benefit/cost analyses using various monetary values of human life and real estate; and (3) discount and inflation rates. The analysis was undertaken with and without including opportunity costs. Phase two focused on non-quantifiable constraints that had not been covered in the first phase, and eliminated nil but three of the alternatives.