# Relationship history for MSHA mine 1506268

Current hierarchy: **James H  Booth → Pinnacle Processing Inc → Pevler Plant**

- 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:** Island Creek Coal Company → Pevler Plant; 1950-01-01 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → Pevler Plant; 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 1981-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Agipcoal Usa Inc → Pevler Plant; 1982-01-01 to 1991-06-19; source msha-controller-operator-history
- **controller_controls_mine:** ENI → Pevler Plant; 1982-01-01 to 1994-01-31; source msha-controller-operator-history
- **controller_controls_operator:** ENI → Agipcoal Usa Inc; 1982-01-01 to 1991-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Shamrock Processing Company Inc → Pevler Plant; 1991-06-20 to 1996-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Michael E  Lyons → Pevler Plant; 1991-06-20 to 1996-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Michael E  Lyons → Shamrock Processing Company Inc; 1991-06-20 to 1996-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Processing Inc → Pevler Plant; 1996-02-21 to 1999-01-19; source msha-controller-operator-history
- **controller_controls_mine:** John E  Dillon → Pevler Plant; 1996-02-21 to 1999-01-19; source msha-controller-operator-history
- **controller_controls_operator:** John E  Dillon → Pinnacle Processing Inc; 1996-02-21 to 1999-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Processing Inc → Pevler Plant; 1999-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → Pevler Plant; 1999-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Pinnacle Processing Inc; 1999-01-20 to current/open; source msha-controller-operator-history