# Relationship history for MSHA mine 4407306

Current hierarchy: **James Wayne  Estep → Estep Coal Company Inc → OMM**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** James Wayne  Estep → OMM; 1981-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → OMM; 2002-12-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dickenson Russell Coal Company, LLC → OMM; 2013-03-12 to 2013-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Dickenson Russell Coal Company, LLC; 2013-03-12 to 2013-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Estep Coal Company Inc → OMM; 2013-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Wayne  Estep → Estep Coal Company Inc; 2013-05-22 to current/open; source msha-controller-operator-history