# Relationship history for MSHA mine 4607439

Current hierarchy: **Joe (John J)  Childress; Catherine  Childress → Childress Service Corp → Childress Plant #2**

- 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:** Childress Service Corp → Childress Plant #2; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe (John J)  Childress et al → Childress Plant #2; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe (John J)  Childress et al → Childress Service Corp; 1988-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Catherine  Childress et al → Childress Service Corp; 1988-01-01 to current/open; source msha-controller-operator-history