# Relationship history for MSHA mine 1510586

Current hierarchy: **James L  Griffith → Griffith Brothers Coal Company Inc → No 10-C Mine (D)**

- 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:** James L  Griffith et al → No 10-C Mine (D); 1976-10-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Griffith Brothers Coal Company Inc → No 10-C Mine (D); 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Griffith et al → Griffith Brothers Coal Company Inc; 1977-07-01 to current/open; source msha-controller-operator-history