# Relationship history for MSHA mine 1517307

Current hierarchy: **Lexington Coal Company LLC → LCC Kentucky LLC → No 10 Surface**

- 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:** Thomas A  Potter et al → No 10 Surface; 1987-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sunny Ridge Mining Company Inc → No 10 Surface; 1992-10-01 to 1999-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Potter et al → Sunny Ridge Mining Company Inc; 1992-10-01 to 1999-06-07; source msha-controller-operator-history
- **controller_controls_operator:** John M  Potter et al → Sunny Ridge Mining Company Inc; 1992-10-01 to 1999-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Sunny Ridge Mining Co., Inc → No 10 Surface; 1999-06-08 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → No 10 Surface; 1999-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Sunny Ridge Mining Co., Inc; 1999-06-08 to 2004-09-30; source msha-controller-operator-history
- **operator_operates_mine:** LCC Kentucky LLC → No 10 Surface; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Company LLC → No 10 Surface; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Company LLC → LCC Kentucky LLC; 2004-10-01 to current/open; source msha-controller-operator-history