# Relationship history for MSHA mine 1512275

Current hierarchy: **Edward L Clemons Estate → Locust Grove 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Wolfe County Steam & Stoker Inc → No 1 Surface; 1980-03-01 to 1981-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Sebastian Ledford → No 1 Surface; 1980-03-01 to 1981-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Sebastian Ledford → Wolfe County Steam & Stoker Inc; 1980-03-01 to 1981-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Mt Vernon Mining-Wolfe County Inc → No 1 Surface; 1981-07-30 to 1984-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Greer Perry L → No 1 Surface; 1981-07-30 to 1984-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Greer Perry L → Mt Vernon Mining-Wolfe County Inc; 1981-07-30 to 1984-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Edward L Clemons Estate → No 1 Surface; 1984-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Locust Grove Inc → No 1 Surface; 1984-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward L Clemons Estate → Locust Grove Inc; 1984-12-03 to current/open; source msha-controller-operator-history