# Relationship history for MSHA mine 4604795

Current hierarchy: **CONSOL Energy Inc → Island Creek Coal Company → Upshur Strip**

- 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 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → Upshur Strip; 1975-09-15 to 1982-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1975-09-15 to 1982-01-06; source msha-controller-operator-history
- **controller_controls_mine:** ENI → Upshur Strip; 1982-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Enoxy Coal Inc → Upshur Strip; 1982-01-07 to 1988-07-19; source msha-controller-operator-history
- **controller_controls_operator:** ENI → Enoxy Coal Inc; 1982-01-07 to 1988-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Mining Company → Upshur Strip; 1988-07-20 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → Upshur Strip; 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 Strip; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Upshur Strip; 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 current/open; source msha-controller-operator-history