# Relationship history for MSHA mine 0401943

Current hierarchy: **Reed Family Companies → 7/11 Materials Inc → 7/11 Materials Inc**

- 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:** 7-11 Materials → 7/11 Materials Inc; 1950-01-01 to 1995-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Mark J  Van Overbeek → 7/11 Materials Inc; 1950-01-01 to 1995-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Mark J  Van Overbeek → 7-11 Materials; 1950-01-01 to 1995-04-11; source msha-controller-operator-history
- **operator_operates_mine:** 7/11 Materials Inc → 7/11 Materials Inc; 1995-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reed Family Companies → 7/11 Materials Inc; 1995-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reed Family Companies → 7/11 Materials Inc; 1995-04-12 to current/open; source msha-controller-operator-history