# Relationship history for MSHA mine 4002407

Current hierarchy: **Roger E  West → Inner Mountain Mining Inc → Mine 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

- **operator_operates_mine:** Briar Gap Coal Company → Mine No 1; 1978-03-01 to 1982-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Harris Johnny → Mine No 1; 1978-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris Johnny → Briar Gap Coal Company; 1978-03-01 to 1982-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Inner Mountain Mining Inc → Mine No 1; 1982-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → Mine No 1; 1982-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Inner Mountain Mining Inc; 1982-02-18 to current/open; source msha-controller-operator-history