# Relationship history for MSHA mine 0503660

Current hierarchy: **Pallaoro George → G L M Farms Inc → Snowbird**

- 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

- **controller_controls_mine:** Pallaoro George → Snowbird; 1981-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G L M Farms Inc → Snowbird; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pallaoro George → G L M Farms Inc; 1981-02-01 to current/open; source msha-controller-operator-history