# Relationship history for MSHA mine 1513708

Current hierarchy: **Pennington Calvin → Hubbs Creek Coal → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Hubbs Creek Coal Company → No 2; 1982-09-01 to 1984-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Pennington John Et Al → No 2; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pennington John Et Al → Hubbs Creek Coal Company; 1982-09-01 to 1984-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Pennington Calvin → No 2; 1983-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & C Coal Company → No 2; 1984-02-24 to 1984-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Senters Clarence-Mike Warfield Et Al → No 2; 1984-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Senters Clarence-Mike Warfield Et Al → J & C Coal Company; 1984-02-24 to 1984-08-22; source msha-controller-operator-history
- **operator_operates_mine:** Hubbs Creek Coal → No 2; 1984-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pennington Calvin → Hubbs Creek Coal; 1984-08-23 to current/open; source msha-controller-operator-history