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NHN permit boundary draws its water from the Dakota Formation, LDx overburden, coal, or <br />underburden zones. The most prolific aquifer in the area is the Brushy Basin Member of the <br />underlying Morrison Formation, which is the uppermost sandstone of that formation. The Brushy <br />Basin Member is well isolated from the LDx overburden, coal and underburden zones by tight <br />siltstone and shale of the lower Dakota Formation and mudstone of the Burro Canyon Formation. <br />Potential Ground Water Use The overburden, coal and underburden zones in the NHN permit <br />area are unsuitable for domestic drinking water and crop irrigation. The overburden and <br />underburden zones, in most cases, would be marginal for livestock, while the coal zone would <br />not. Low permeability, cyclic water levels and resulting low well yields greatly reduce any <br />potential use of water from the three strata (overbruden, coal, underburden). <br />Section 2.04.7 Page 13 April 2016 (PR -01) <br />