# Relationship history for MSHA mine 0102604

Current hierarchy: **Frank C  Mann → Bullock Mining Company Inc → Bullock Mine #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:** Frank C  Mann → Bullock Mine #1; 1984-06-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bullock Mining Company Inc → Bullock Mine #1; 1984-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank C  Mann → Bullock Mining Company Inc; 1984-08-01 to current/open; source msha-controller-operator-history