# Relationship history for MSHA mine 3603298

Current hierarchy: **Custom Coals Penna; Custom Coals Holdings → Custom Coals Laurel → Laurel Preparation Facility**

- 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

- **operator_operates_mine:** Consolidation Coal Company → Laurel Preparation Facility; 1950-01-01 to 1984-09-30; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Laurel Preparation Facility; 1950-01-01 to 2013-12-04; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consolidation Coal Company; 1950-01-01 to 1984-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Mines Corp → Laurel Preparation Facility; 1984-10-01 to 1992-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Nippon Kokan K K et al → Laurel Preparation Facility; 1984-10-01 to 1992-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Nippon Kokan K K et al → Laurel Mines Corp; 1984-10-01 to 1992-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Triebel Inc → Laurel Preparation Facility; 1992-07-17 to 1994-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Woods Ralph → Laurel Preparation Facility; 1992-07-17 to 1994-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Woods Ralph → Triebel Inc; 1992-07-17 to 1994-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Custom Coals Laurel → Laurel Preparation Facility; 1994-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Custom Coals Holdings et al → Laurel Preparation Facility; 1994-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Custom Coals Holdings et al → Custom Coals Laurel; 1994-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Custom Coals Penna et al → Custom Coals Laurel; 1994-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Laurel Preparation Facility; 2013-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Consolidation Coal Company; 2013-12-05 to 1984-09-30; source msha-controller-operator-history