# Relationship history for MSHA mine 3303510

Current hierarchy: **Lahmers Raymond → Burning Hollow Coal Company Inc → Robertsville Strip**

- 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:** Garaux Company → Robertsville Strip; 1975-04-25 to 1977-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Garaux Merle J → Robertsville Strip; 1975-04-25 to 1977-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Garaux Merle J → Garaux Company; 1975-04-25 to 1977-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Burning Hollow Coal Company Inc → Robertsville Strip; 1977-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lahmers Raymond → Robertsville Strip; 1977-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lahmers Raymond → Burning Hollow Coal Company Inc; 1977-05-16 to current/open; source msha-controller-operator-history