# Relationship history for MSHA mine 4601393

Current hierarchy: **Siderius Inc → Powellton Company → Jane Ann 7-B**

- 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:** Powellton Company → Jane Ann 7-B; 1950-01-01 to 1981-11-23; source msha-controller-operator-history
- **controller_controls_mine:** Siderius Inc → Jane Ann 7-B; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siderius Inc → Powellton Company; 1950-01-01 to 1981-11-23; source msha-controller-operator-history
- **operator_operates_mine:** L B & D Corp → Jane Ann 7-B; 1981-11-24 to 1982-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Dunn Naaman → Jane Ann 7-B; 1981-11-24 to 1982-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Dunn Naaman → L B & D Corp; 1981-11-24 to 1982-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Black Maverick Coal Company Inc → Jane Ann 7-B; 1982-03-24 to 1982-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Johnny D → Jane Ann 7-B; 1982-03-24 to 1982-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Johnny D → Black Maverick Coal Company Inc; 1982-03-24 to 1982-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Black Maverick Coal Company Inc → Jane Ann 7-B; 1982-09-01 to 1984-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Turpin Henry T Sr → Jane Ann 7-B; 1982-09-01 to 1984-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Turpin Henry T Sr → Black Maverick Coal Company Inc; 1982-09-01 to 1984-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Powellton Company → Jane Ann 7-B; 1984-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siderius Inc → Powellton Company; 1984-05-21 to current/open; source msha-controller-operator-history