# Relationship history for MSHA mine 4703748

Current hierarchy: **Jim L Hass; Janice E Hass → Hass Excavating → Hass 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:** Hass Excavating → Hass Pit; 2015-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim L Hass et al → Hass Pit; 2015-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim L Hass et al → Hass Excavating; 2015-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janice E Hass et al → Hass Excavating; 2015-02-25 to current/open; source msha-controller-operator-history