# Relationship history for MSHA mine 4700013

Current hierarchy: **Dale N  Lochner; Paul R  Lochner → Boehnen Inc → HOLLFELDER 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:** Boehnen Inc → HOLLFELDER QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale N  Lochner  et al → HOLLFELDER QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale N  Lochner  et al → Boehnen Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul R  Lochner  et al → Boehnen Inc; 1950-01-01 to current/open; source msha-controller-operator-history