The advent of high temperature superconductors has stimulated interest in their utilization in electric power utility applications. A study of their impact upon power transmission and generation was sponsored by the Electric Power Research Institute. The investigation of the use of a high temperature superconductor in a superconducting power transmission line is reported here. The results of this investigation show that the use of a high temperature superconductor to replace a low temperature superconductor in a superconducting power transmission line results in a significant cost saving. 9 refs., 1 tab.