# Relationship history for MSHA mine 0404403

Current hierarchy: **Allen Stan → Iron Tail Mining Company → Iron Tail 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:** Rainbows End Mining Company → Iron Tail Mine; 1980-03-01 to 1981-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Hills Ken & Al Landers → Iron Tail Mine; 1980-03-01 to 1981-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Hills Ken & Al Landers → Rainbows End Mining Company; 1980-03-01 to 1981-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Iron Tail Mining Company → Iron Tail Mine; 1981-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen Stan Et Al → Iron Tail Mine; 1981-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen Stan Et Al → Iron Tail Mining Company; 1981-07-08 to current/open; source msha-controller-operator-history