# Relationship history for MSHA mine 0102194

Current hierarchy: **Gagnon Fred M → A I M E E → Oakman No 4**

- 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:** Gagnon Fred M → Oakman No 4; 1978-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A I M E E → Oakman No 4; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gagnon Fred M → A I M E E; 1980-04-01 to current/open; source msha-controller-operator-history