# Relationship history for MSHA mine 4703729

Current hierarchy: **Frank  Friendshuh; Greg  Friendshuh → Friendshuh Farms → Friendshuh Farms 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Friendshuh Farms → Friendshuh Farms Pit; 2014-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Friendshuh et al → Friendshuh Farms Pit; 2014-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Friendshuh et al → Friendshuh Farms; 2014-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Friendshuh et al → Friendshuh Farms; 2014-09-16 to current/open; source msha-controller-operator-history