# Relationship history for MSHA mine 1519594

Current hierarchy: **Clifford  Nantz; Jeff  Frazier → Fraziernantz LLC → Job #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Phipps Excavating LLC → Job #2; 2011-06-07 to 2013-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Timothy  Phipps → Job #2; 2011-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Phipps → Phipps Excavating LLC; 2011-06-07 to 2013-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Fraziernantz LLC → Job #2; 2013-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clifford  Nantz et al → Job #2; 2013-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clifford  Nantz et al → Fraziernantz LLC; 2013-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Frazier et al → Fraziernantz LLC; 2013-07-17 to current/open; source msha-controller-operator-history