# Relationship history for MSHA mine 0504998

Current hierarchy: **MTFE Holdings; HFI LLC → Extreme Excavation → Box Creek Placer Mine**

- 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:** HFI LLC et al → Box Creek Placer Mine; 2008-10-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Miller Taylor Family Investments → Box Creek Placer Mine; 2012-07-01 to 2013-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Mindy  Miller et al → Box Creek Placer Mine; 2012-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mindy  Miller et al → Miller Taylor Family Investments; 2012-07-01 to 2013-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Megan R  Ziegler et al → Miller Taylor Family Investments; 2012-07-01 to 2013-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Extreme Excavation → Box Creek Placer Mine; 2013-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** HFI LLC et al → Extreme Excavation; 2013-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MTFE Holdings et al → Extreme Excavation; 2013-12-10 to current/open; source msha-controller-operator-history