# Relationship history for MSHA mine 1513869

Current hierarchy: **Garland Kenneth-Carl Kelly → Chevy Coal Company → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Chevy Coal Company → No 1; 1982-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garland Kenneth-Carl Kelly Et Al → No 1; 1982-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garland Kenneth-Carl Kelly Et Al → Chevy Coal Company; 1982-12-01 to current/open; source msha-controller-operator-history