# Relationship history for MSHA mine 4401638

Current hierarchy: **Owens Otto & Gordon → Owens Coal Company → No 1 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Rhonda Coal Company Inc → No 1 Mine; 1950-01-01 to 1975-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Samuel J  Miller → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Samuel J  Miller → Rhonda Coal Company Inc; 1950-01-01 to 1975-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Owens Coal Company → No 1 Mine; 1975-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Owens Otto & Gordon Et Al → No 1 Mine; 1975-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Owens Otto & Gordon Et Al → Owens Coal Company; 1975-12-01 to current/open; source msha-controller-operator-history