# Relationship history for MSHA mine 4604166

Current hierarchy: **Rogers Odell → Sherwood Coal Company Inc → No 1**

- 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 → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kirk Brothers Coal Company Inc → No 1; 1974-06-15 to 1977-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Kirk Lawrence → No 1; 1974-06-15 to 1977-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Kirk Lawrence → Kirk Brothers Coal Company Inc; 1974-06-15 to 1977-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → No 1; 1977-04-06 to 1977-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1977-04-06 to 1977-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Sherwood Coal Company Inc → No 1; 1977-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Odell → No 1; 1977-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Odell → Sherwood Coal Company Inc; 1977-05-02 to current/open; source msha-controller-operator-history