# Relationship history for MSHA mine 1505507

Current hierarchy: **Coleman Jimmie Jr → Wolfpen Coal Company → Wolf Pen No 3**

- 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:** May Coal Company → Wolf Pen No 3; 1950-01-01 to 1975-09-16; source msha-controller-operator-history
- **controller_controls_mine:** May Victor → Wolf Pen No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** May Victor → May Coal Company; 1950-01-01 to 1975-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Rag Aktiengesellschaft → Wolf Pen No 3; 1974-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Standard Sign & Signal Company → Wolf Pen No 3; 1975-09-17 to 1977-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Standard Sign & Signal Company; 1975-09-17 to 1977-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Jimmie Jr → Wolf Pen No 3; 1977-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Auxier Coal Company → Wolf Pen No 3; 1977-08-01 to 1978-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Fields Buddy & James Thompson → Wolf Pen No 3; 1977-08-01 to 1978-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Fields Buddy & James Thompson → Auxier Coal Company; 1977-08-01 to 1978-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Wolfpen Coal Company → Wolf Pen No 3; 1978-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Jimmie Jr → Wolfpen Coal Company; 1978-11-21 to current/open; source msha-controller-operator-history