# Relationship history for MSHA mine 0502944

Current hierarchy: **White Wilbur → Brooklyn Mining Company → Brooklyn Mine**

- 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:** Alpha Energy & Gold → Brooklyn Mine; 1950-01-01 to 1985-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Linton D C → Brooklyn Mine; 1950-01-01 to 1985-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Linton D C → Alpha Energy & Gold; 1950-01-01 to 1985-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Brooklyn Mining Company → Brooklyn Mine; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** White Wilbur → Brooklyn Mine; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Wilbur → Brooklyn Mining Company; 1985-03-01 to current/open; source msha-controller-operator-history