# Relationship history for MSHA mine 1102857

Current hierarchy: **Walter T  Ozee → Coal Valley Mining Inc → Coal Valley Mining Inc**

- 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:** Lorenzo Mining Company Inc → Coal Valley Mining Inc; 1988-06-01 to 1991-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Lorenzo Louis → Coal Valley Mining Inc; 1988-06-01 to 1991-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Lorenzo Louis → Lorenzo Mining Company Inc; 1988-06-01 to 1991-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Gabeco Mining → Coal Valley Mining Inc; 1991-06-10 to 1991-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Cooley Fred W → Coal Valley Mining Inc; 1991-06-10 to 1991-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Cooley Fred W → Gabeco Mining; 1991-06-10 to 1991-10-01; source msha-controller-operator-history
- **operator_operates_mine:** Coal Valley Mining Inc → Coal Valley Mining Inc; 1991-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Walter T  Ozee → Coal Valley Mining Inc; 1991-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter T  Ozee → Coal Valley Mining Inc; 1991-10-02 to current/open; source msha-controller-operator-history