# Relationship history for MSHA mine 1508321

Current hierarchy: **Talmage D  Meade → Meade & Shepherd Coal Company Inc → No 2 Surface**

- 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:** Meade & Shepherd Coal Company Inc → No 2 Surface; 1975-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Talmage D  Meade → No 2 Surface; 1975-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Talmage D  Meade → Meade & Shepherd Coal Company Inc; 1975-04-01 to current/open; source msha-controller-operator-history