# Relationship history for MSHA mine 3303717

Current hierarchy: **Lahmers Raymond → Burning Hollow Coal Company Inc → Burning Hollow Coal No 2**

- 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:** Lahmers Raymond → Burning Hollow Coal No 2; 1977-05-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burning Hollow Coal Company Inc → Burning Hollow Coal No 2; 1978-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lahmers Raymond → Burning Hollow Coal Company Inc; 1978-10-01 to current/open; source msha-controller-operator-history