# Relationship history for MSHA mine 1514124

Current hierarchy: **Cox Ronnie L → Pharaoh Coal → 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

- **operator_operates_mine:** Gordon Coal Company → No 1; 1983-07-01 to 1990-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Patterson Bill Et Al → No 1; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patterson Bill Et Al → Gordon Coal Company; 1983-07-01 to 1990-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Pharaoh Coal → No 1; 1990-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cox Ronnie L Et Al → No 1; 1990-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cox Ronnie L Et Al → Pharaoh Coal; 1990-01-26 to current/open; source msha-controller-operator-history