# Relationship history for MSHA mine 4605823

Current hierarchy: **Core Natural Resources Inc → Upshur Property LLC → Upshur Complex**

- 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

- **controller_controls_mine:** Occidental Petroleum Corp → Upshur Complex; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → Upshur Complex; 1978-07-01 to 1982-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1978-07-01 to 1982-01-04; source msha-controller-operator-history
- **controller_controls_mine:** ENI → Upshur Complex; 1982-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Enoxy Coal Inc → Upshur Complex; 1982-01-05 to 1988-07-19; source msha-controller-operator-history
- **controller_controls_operator:** ENI → Enoxy Coal Inc; 1982-01-05 to 1988-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Mining Company → Upshur Complex; 1988-07-20 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → Upshur Complex; 1988-07-20 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Mining Company; 1988-07-20 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → Upshur Complex; 1993-07-01 to 1996-01-08; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Upshur Complex; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Island Creek Coal Company; 1993-07-01 to 1996-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Upshur Property LLC → Upshur Complex; 1996-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anker Group Inc → Upshur Complex; 1996-01-09 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Upshur Property LLC; 1996-01-09 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Upshur Complex; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Upshur Property LLC; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Upshur Complex; 2011-06-15 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Upshur Property LLC; 2011-06-15 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Core Natural Resources Inc → Upshur Complex; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core Natural Resources Inc → Upshur Property LLC; 2025-01-14 to current/open; source msha-controller-operator-history