# Relationship history for MSHA mine 1513812

Current hierarchy: **Leroy  Lackey → Ball Branch Mining Inc → #1 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

- **operator_operates_mine:** Ball Branch Mining Inc → #1 Surface; 1982-11-01 to 1984-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Stacy John S → #1 Surface; 1982-11-01 to 1984-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Stacy John S → Ball Branch Mining Inc; 1982-11-01 to 1984-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Ball Branch Mining Inc → #1 Surface; 1984-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leroy  Lackey et al → #1 Surface; 1984-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Lackey et al → Ball Branch Mining Inc; 1984-11-30 to current/open; source msha-controller-operator-history