# Relationship history for MSHA mine 4001702

Current hierarchy: **Peery Bruce → S E C Coal 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

- **operator_operates_mine:** V S S Coal Company → No 1 Surface; 1973-08-01 to 1975-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Terry Leroy → No 1 Surface; 1973-08-01 to 1975-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Terry Leroy → V S S Coal Company; 1973-08-01 to 1975-08-01; source msha-controller-operator-history
- **operator_operates_mine:** S E C Coal Inc → No 1 Surface; 1975-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peery Bruce → No 1 Surface; 1975-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peery Bruce → S E C Coal Inc; 1975-08-02 to current/open; source msha-controller-operator-history