# Relationship history for MSHA mine 4405935

Current hierarchy: **Davis James-James Mc Vey → Omega Coal 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:** Four D Coal Company Inc → No 1; 1982-08-01 to 1983-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Deel Carmel & Odell Et Al → No 1; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deel Carmel & Odell Et Al → Four D Coal Company Inc; 1982-08-01 to 1983-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Omega Coal Company Inc → No 1; 1983-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Davis James-James Mc Vey Et Al → No 1; 1983-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis James-James Mc Vey Et Al → Omega Coal Company Inc; 1983-02-10 to current/open; source msha-controller-operator-history