# Relationship history for MSHA mine 3001185

Current hierarchy: **Augusta Group Company → Empire State Mines LLC → Empire State Mines**

- 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:** St Joe Resources Company → Empire State Mines; 1950-01-01 to 1987-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Fluor Corp → Empire State Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fluor Corp → St Joe Resources Company; 1950-01-01 to 1987-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Zca Mines Inc → Empire State Mines; 1987-09-17 to 2003-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Horsehead Industries Inc → Empire State Mines; 1987-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horsehead Industries Inc → Zca Mines Inc; 1987-09-17 to 2003-09-18; source msha-controller-operator-history
- **operator_operates_mine:** Empire State Mines LLC → Empire State Mines; 2003-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ontzinc → Empire State Mines; 2003-09-19 to 2016-12-29; source msha-controller-operator-history
- **controller_controls_operator:** Ontzinc → Empire State Mines LLC; 2003-09-19 to 2016-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Augusta Group Company → Empire State Mines; 2016-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Augusta Group Company → Empire State Mines LLC; 2016-12-30 to current/open; source msha-controller-operator-history