# Relationship history for MSHA mine 4406223

Current hierarchy: **Hurley Burton → Hurley'S Enterprise 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Hurley Burton → Mine No 1; 1985-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hurley'S Enterprise Inc → Mine No 1; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hurley Burton → Hurley'S Enterprise Inc; 1985-06-01 to current/open; source msha-controller-operator-history