# Relationship history for MSHA mine 1509669

Current hierarchy: **Donald G  LaViers → Red Fox Coal Company Inc → No 1 Surface**

- 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:** Combs N L → No 1 Surface; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald G  LaViers → No 1 Surface; 1975-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** N & R Coal Company Inc → No 1 Surface; 1976-03-19 to 1976-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Combs N L → N & R Coal Company Inc; 1976-03-19 to 1976-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Belkona Mining Company Inc → No 1 Surface; 1976-08-03 to 1976-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Price Seldom W → No 1 Surface; 1976-08-03 to 1976-09-04; source msha-controller-operator-history
- **controller_controls_operator:** Price Seldom W → Belkona Mining Company Inc; 1976-08-03 to 1976-09-04; source msha-controller-operator-history
- **operator_operates_mine:** Red Fox Coal Company Inc → No 1 Surface; 1976-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald G  LaViers → Red Fox Coal Company Inc; 1976-09-05 to current/open; source msha-controller-operator-history