# Relationship history for MSHA mine 3600962

Current hierarchy: **CONSOL Energy Inc → Island Creek Coal Company → Vesta 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Jones & Laughlin Steel Corp → Vesta Mine; 1950-01-01 to 1982-05-20; source msha-controller-operator-history
- **controller_controls_mine:** LTV Corporation → Vesta Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LTV Corporation → Jones & Laughlin Steel Corp; 1950-01-01 to 1982-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Vesta Mining Company → Vesta Mine; 1982-05-21 to 1987-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Vesta Mine; 1982-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Vesta Mining Company; 1982-05-21 to 1987-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Northern Continental Operating Company Inc → Vesta Mine; 1987-12-07 to 1991-06-20; source msha-controller-operator-history
- **controller_controls_mine:** CLI International Enterprises Corp → Vesta Mine; 1987-12-07 to 1991-06-20; source msha-controller-operator-history
- **controller_controls_operator:** CLI International Enterprises Corp → Northern Continental Operating Company Inc; 1987-12-07 to 1991-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Vesta Mining Company → Vesta Mine; 1991-06-21 to 1998-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Vesta Mining Company; 1991-06-21 to 1998-11-06; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Vesta Mine; 1993-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → Vesta Mine; 1998-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Island Creek Coal Company; 1998-11-07 to current/open; source msha-controller-operator-history