# Relationship history for MSHA mine 1518120

Current hierarchy: **Lexington Coal Company LLC → LCC Kentucky LLC → 17-West Preparation Plant**

- 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:** 17 West Mining Inc → 17-West Preparation Plant; 1998-11-01 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → 17-West Preparation Plant; 1998-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → 17 West Mining Inc; 1998-11-01 to 2004-09-30; source msha-controller-operator-history
- **operator_operates_mine:** LCC Kentucky LLC → 17-West Preparation Plant; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Company LLC → 17-West Preparation Plant; 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