Exhibit 8.1
List of Subsidiaries

Name
Jurisdiction of Organization
Ownership Percentage
Hartshorne Coal Mining Pty Ltd
Australia
100%
HCM Resources Pty Ltd
Australia
100%
Hartshorne Holdings, LLC
Delaware
100%
Hartshorne Mining Group, LLC
Delaware
100%
Hartshorne Mining, LLC
Delaware
100%
Hartshorne Land, LLC
Delaware
100%
HCM Operations, LLC
Delaware
100%