# Relationship history for MSHA mine 1000877

Current hierarchy: **Mc Dowell George A → Rescue Mining Company → Rescue Mine**

- 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:** Idaho Rand Inc → Rescue Mine; 1950-01-01 to 1981-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Osburn Russell → Rescue Mine; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Osburn Russell → Idaho Rand Inc; 1950-01-01 to 1981-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Rescue Mining Company → Rescue Mine; 1981-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Dowell George A → Rescue Mine; 1981-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Dowell George A → Rescue Mining Company; 1981-07-14 to current/open; source msha-controller-operator-history