# Relationship history for MSHA mine 2700244

Current hierarchy: **Hiltz Construction Inc → Hiltz Construcion Inc → Hiltz Pit**

- 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

- **operator_operates_mine:** Hiltz Construcion Inc → Hiltz Pit; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hiltz Construction Inc → Hiltz Pit; 1981-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hiltz Construction Inc → Hiltz Construcion Inc; 1981-10-01 to current/open; source msha-controller-operator-history