# Relationship history for MSHA mine 4402836

Current hierarchy: **Wiser Elmer (Bob) → Furnace Associates Inc → Mine No 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Furnace Associates Inc → Mine No 1; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wiser Elmer (Bob) → Mine No 1; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wiser Elmer (Bob) → Furnace Associates Inc; 1978-01-01 to current/open; source msha-controller-operator-history