# Relationship history for MSHA mine 4406792

Current hierarchy: **David  Stevenson → Oak Coal Corp → No 1**

- 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

- **operator_operates_mine:** Freedom Energy Company Inc → No 1; 1995-02-01 to 1998-10-12; source msha-controller-operator-history
- **controller_controls_mine:** James Wayne  Estep → No 1; 1995-02-01 to 1998-10-12; source msha-controller-operator-history
- **controller_controls_operator:** James Wayne  Estep → Freedom Energy Company Inc; 1995-02-01 to 1998-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Oak Coal Corp → No 1; 1998-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Stevenson → No 1; 1998-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Stevenson → Oak Coal Corp; 1998-10-13 to current/open; source msha-controller-operator-history