# Relationship history for MSHA mine 4406069

Current hierarchy: **Hackney Frank W → M P & M Coal Company Inc → No 3**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Nicewonder J D - Don Nicewonder Et Al → No 3; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hackney Frank W → No 3; 1981-10-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S G Coal Company Inc → No 3; 1984-03-01 to 1988-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Nicewonder J D - Don Nicewonder Et Al → S G Coal Company Inc; 1984-03-01 to 1988-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Terry L  Matney → No 3; 1984-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edison  Matney et al → No 3; 1986-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** P M C Coal Company Inc → No 3; 1988-05-04 to 1990-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Terry L  Matney → P M C Coal Company Inc; 1988-05-04 to 1990-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Andy Trent Branch Coal Company Inc → No 3; 1990-07-30 to 1993-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Edison  Matney et al → Andy Trent Branch Coal Company Inc; 1990-07-30 to 1993-01-31; source msha-controller-operator-history
- **controller_controls_operator:** James  Estep et al → Andy Trent Branch Coal Company Inc; 1990-07-30 to 1993-01-31; source msha-controller-operator-history
- **operator_operates_mine:** M P & M Coal Company Inc → No 3; 1993-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hackney Frank W → M P & M Coal Company Inc; 1993-02-01 to current/open; source msha-controller-operator-history