# Relationship history for MSHA mine 1514164

Current hierarchy: **Day Rickey & David C Banks → Roxana Coal Company Inc → No 4**

- 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:** Commerce Coal Company Inc → No 4; 1983-08-01 to 1990-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Hogg Jim → No 4; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hogg Jim → Commerce Coal Company Inc; 1983-08-01 to 1990-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Day Rickey & David C Banks → No 4; 1984-01-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Roxana Coal Company Inc → No 4; 1990-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Day Rickey & David C Banks → Roxana Coal Company Inc; 1990-08-14 to current/open; source msha-controller-operator-history