# Relationship history for MSHA mine 1517684

Current hierarchy: **Lexington Coal Company LLC → LCC Kentucky LLC → Job #19**

- 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:** John M  Potter et al → Job #19; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill J  Collett et al → Job #19; 1993-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Universal Mining Corp → Job #19; 1995-05-01 to 1996-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Bill J  Collett et al → Universal Mining Corp; 1995-05-01 to 1996-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Sunny Ridge Mining Company Inc → Job #19; 1996-11-05 to 2005-10-05; source msha-controller-operator-history
- **controller_controls_operator:** John M  Potter et al → Sunny Ridge Mining Company Inc; 1996-11-05 to 2005-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Potter et al → Sunny Ridge Mining Company Inc; 1996-11-05 to 2005-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Company LLC → Job #19; 2004-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** LCC Kentucky LLC → Job #19; 2005-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Company LLC → LCC Kentucky LLC; 2005-10-06 to current/open; source msha-controller-operator-history