# Relationship history for MSHA mine 4605373

Current hierarchy: **Chambers James F → Piedmont Mining Company Inc → No 1**

- 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:** Chambers James F → No 1; 1975-12-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Piedmont Mining Company Inc → No 1; 1976-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chambers James F → Piedmont Mining Company Inc; 1976-12-01 to current/open; source msha-controller-operator-history