# Relationship history for MSHA mine 1511499

Current hierarchy: **Thornberry Rennie - Earl → T K G Coal Company → T K G Tipple 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:** Thornberry Rennie - Earl Et Al → T K G Tipple No 2; 1977-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T K G Coal Company → T K G Tipple No 2; 1978-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thornberry Rennie - Earl Et Al → T K G Coal Company; 1978-07-01 to current/open; source msha-controller-operator-history