# Relationship history for MSHA mine 4405621

Current hierarchy: **Owens Otto & Gordon → Owens Coal Company → No 7**

- 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

- **controller_controls_mine:** Owens Otto & Gordon Et Al → No 7; 1975-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 2-B B Coal Company → No 7; 1981-03-01 to 1981-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Johnny & Hanford → No 7; 1981-03-01 to 1981-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Johnny & Hanford → 2-B B Coal Company; 1981-03-01 to 1981-05-12; source msha-controller-operator-history
- **operator_operates_mine:** Sammy Dean Coal Company → No 7; 1981-05-13 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Deel Lando & Lonnie Yates → No 7; 1981-05-13 to 1981-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Deel Lando & Lonnie Yates → Sammy Dean Coal Company; 1981-05-13 to 1981-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Owens Coal Company → No 7; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Owens Otto & Gordon Et Al → Owens Coal Company; 1981-06-01 to current/open; source msha-controller-operator-history