# Relationship history for MSHA mine 1517293

Current hierarchy: **Adams Bobby W & Paul → Four Adams Coal Company Inc → 3 2**

- 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:** L & L Coal Corp → 3 2; 1992-09-01 to 1993-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Sturgill Leslie → 3 2; 1992-09-01 to 1993-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Sturgill Leslie → L & L Coal Corp; 1992-09-01 to 1993-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Adams Bobby W & Paul → 3 2; 1993-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Four Adams Coal Company Inc → 3 2; 1993-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Bobby W & Paul → Four Adams Coal Company Inc; 1993-08-09 to current/open; source msha-controller-operator-history