# Relationship history for MSHA mine 0102022

Current hierarchy: **Alon  Ballenger → C F Ballenger Corp → Clark Pit**

- 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:** C F Ballenger Corp → Clark Pit; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alon  Ballenger → Clark Pit; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alon  Ballenger → C F Ballenger Corp; 1979-03-01 to current/open; source msha-controller-operator-history