# Relationship history for MSHA mine 4601863

Current hierarchy: **Paul R  Phillips; Malcolm  Phillips → Har-Mat Coal Company Inc → No 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:** Island Creek Coal Company → No 2; 1950-01-01 to 1980-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1950-01-01 to 1980-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Pawnee Coal Company Inc → No 2; 1980-02-01 to 1981-02-28; source msha-controller-operator-history
- **controller_controls_mine:** White Mountain Mining Co., LLC → No 2; 1980-02-01 to 1981-02-28; source msha-controller-operator-history
- **controller_controls_operator:** White Mountain Mining Co., LLC → Pawnee Coal Company Inc; 1980-02-01 to 1981-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Boone Energy → No 2; 1981-03-01 to 1987-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Awv Finance Corp Et Al → No 2; 1981-03-01 to 1987-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Awv Finance Corp Et Al → Boone Energy; 1981-03-01 to 1987-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul R  Phillips et al → No 2; 1986-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Har-Mat Coal Company Inc → No 2; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul R  Phillips et al → Har-Mat Coal Company Inc; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Malcolm  Phillips et al → Har-Mat Coal Company Inc; 1987-09-01 to current/open; source msha-controller-operator-history