# Relationship history for MSHA mine 1517040

Current hierarchy: **Cornelius  Rowe → Black Gem Mining Inc → Mine No 2**

- 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:** Cornelius  Rowe → Mine No 2; 1989-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Gem Mining Inc → Mine No 2; 1991-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cornelius  Rowe → Black Gem Mining Inc; 1991-01-01 to current/open; source msha-controller-operator-history