# Relationship history for MSHA mine 4702744

Current hierarchy: **Ochs Edward A → Lonsberg/Ochs Division E A O Corp → Klar Quarry**

- 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:** Lenny Lonsberg Crushing & Lime Company → Klar Quarry; 1981-09-01 to 1984-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Lenny  Lonsberg → Klar Quarry; 1981-09-01 to 1984-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Lenny  Lonsberg → Lenny Lonsberg Crushing & Lime Company; 1981-09-01 to 1984-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Lonsberg/Ochs Division E A O Corp → Klar Quarry; 1984-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ochs Edward A → Klar Quarry; 1984-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ochs Edward A → Lonsberg/Ochs Division E A O Corp; 1984-06-30 to current/open; source msha-controller-operator-history