# Relationship history for MSHA mine 4405812

Current hierarchy: **Mitchell Harold L → Valley Mining Company Inc → 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:** Alvy Creek Coal Company Inc → No 1; 1981-12-01 to 1986-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Blackwell Gentry Et Al → No 1; 1981-12-01 to 1986-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Blackwell Gentry Et Al → Alvy Creek Coal Company Inc; 1981-12-01 to 1986-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Valley Mining Company Inc → No 1; 1986-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell Harold L → No 1; 1986-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Harold L → Valley Mining Company Inc; 1986-05-08 to current/open; source msha-controller-operator-history