# Relationship history for MSHA mine 5002054

Current hierarchy: **Jay J Marquardt → Jay-Mar → Jay-Mar**

- 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:** Jay-Mar → Jay-Mar; 2016-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jay J Marquardt → Jay-Mar; 2016-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jay J Marquardt → Jay-Mar; 2016-11-14 to current/open; source msha-controller-operator-history