# Relationship history for MSHA mine 3605855

Current hierarchy: **Robert  Eggleston → Carbon Sales, Inc. → Laurel Breaker**

- 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:** Corgan William H → Laurel Breaker; 1970-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northeast Energy Company → Laurel Breaker; 1975-10-31 to 1993-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Corgan William H → Northeast Energy Company; 1975-10-31 to 1993-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Eggleston et al → Laurel Breaker; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jhjm Inc → Laurel Breaker; 1993-06-21 to 2011-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Holleran Joseph → Laurel Breaker; 1993-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holleran Joseph → Jhjm Inc; 1993-06-21 to 2011-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Carbon Sales, Inc. → Laurel Breaker; 2011-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Eggleston et al → Carbon Sales, Inc.; 2011-07-27 to current/open; source msha-controller-operator-history