# Relationship history for MSHA mine 4102998

Current hierarchy: **Jack  Albert → Reece Albert Inc → Oehler 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

- **controller_controls_mine:** Jack  Albert  et al → Oehler Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Reece Albert Inc → Oehler Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Albert  et al → Reece Albert Inc; 1980-04-01 to current/open; source msha-controller-operator-history