# Relationship history for MSHA mine 1800661

Current hierarchy: **Zuchowski Pat → Kirby Energy Inc → Commonwealth Job**

- 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:** Moran Thomas L → Commonwealth Job; 1978-06-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T L Moran Inc → Commonwealth Job; 1978-09-01 to 1979-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Moran Thomas L → T L Moran Inc; 1978-09-01 to 1979-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Commonwealth Coals Inc → Commonwealth Job; 1979-05-24 to 1993-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Fetterolf Donald L → Commonwealth Job; 1979-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fetterolf Donald L → Commonwealth Coals Inc; 1979-05-24 to 1993-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Kirby Energy Inc → Commonwealth Job; 1993-10-01 to 1994-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Davis Norman → Commonwealth Job; 1993-10-01 to 1994-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Davis Norman → Kirby Energy Inc; 1993-10-01 to 1994-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Kirby Energy Inc → Commonwealth Job; 1994-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zuchowski Pat → Commonwealth Job; 1994-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zuchowski Pat → Kirby Energy Inc; 1994-11-09 to current/open; source msha-controller-operator-history