# Relationship history for MSHA mine 1513320

Current hierarchy: **Carl  Jackson; Fred  Jackson → Hap-Hazard Construction → No1**

- 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:** Hap-Hazard Construction → No1; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred  Jackson et al → No1; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Jackson et al → Hap-Hazard Construction; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Jackson et al → Hap-Hazard Construction; 1982-01-01 to current/open; source msha-controller-operator-history