# Relationship history for MSHA mine 4405250

Current hierarchy: **Ratliff Bueford → O R R Coal Corp → No 1**

- 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:** Coleman Gerald → No 1; 1978-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Eva Coal Corp → No 1; 1979-07-01 to 1980-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Gerald → Little Eva Coal Corp; 1979-07-01 to 1980-06-09; source msha-controller-operator-history
- **operator_operates_mine:** O R R Coal Corp → No 1; 1980-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Bueford → No 1; 1980-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Bueford → O R R Coal Corp; 1980-06-10 to current/open; source msha-controller-operator-history