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|This paper describes a case study for the ventilation planning at Utah Fuel Company's Skyline Mines which are located outside Price. Utah. The Skyline Mines are currently comprised of two longwall coal mining blocks located in two different mines. A third replacement longwall block is currently being developed. Future ventilation systems for the mines were determined by establishing ventilation models developed from data collected during a detailed ventilation survey. The paper discusses the challenge to coordinate immediate ventilation requirements with long-term demands. The continuous movement of the longwall, which frequently represented the only open split in the ventilation network, resulted in cyclic ventilation demands dependent upon the length of the tailgate. A series of system configuration changes were recommended based on the results of the network modeling exercise and an economic evaluation of the various options. The scope and cost of the configuration changes, and the mead improvement resulting from these changes is discussed.|