# Relationship history for MSHA mine 3503886

Current hierarchy: **John  McAmis → J.E. McAmis Inc. → Mine 3**

- 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

- **controller_controls_mine:** John  McAmis → Mine 3; 2018-09-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J.E. McAmis Inc. → Mine 3; 2019-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  McAmis → J.E. McAmis Inc.; 2019-02-26 to current/open; source msha-controller-operator-history