# Relationship history for MSHA mine 3503472

Current hierarchy: **Jim E  Friermood → Jefco Enterprises LLC → Jefco Enterprises**

- 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:** Jefco Enterprises → Jefco Enterprises; 1998-12-01 to 2009-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Jim E  Friermood → Jefco Enterprises; 1998-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim E  Friermood → Jefco Enterprises; 1998-12-01 to 2009-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Jefco Enterprises LLC → Jefco Enterprises; 2009-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim E  Friermood → Jefco Enterprises; 2009-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim E  Friermood → Jefco Enterprises LLC; 2009-09-28 to current/open; source msha-controller-operator-history