# Relationship history for MSHA mine 1517631

Current hierarchy: **Smith Glen A → Emmanuel Mining 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

- **controller_controls_mine:** Rex  Fought → No 1; 1992-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Garrett Mining Inc → No 1; 1995-01-01 to 1998-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Garrett Mining Inc; 1995-01-01 to 1998-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Emmanuel Mining Inc → No 1; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Glen A → No 1; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Glen A → Emmanuel Mining Inc; 1998-08-01 to current/open; source msha-controller-operator-history