ABSTRACT:Southeastern Montana's Tongue River basin is experiencing rapid development of its extensive coal deposits. This development has a significant impact on the basin's hydrologic systems. Ground water flow is disrupted by mining and its quality degraded. Mine mouth conversion of the coal involves consumption of large amounts of water at the expense of downstream UBCTS, creating several water conflicts. Allocation of Tongue River water has favored agricultural users, and re‐allocation is difficul
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