# Relationship history for MSHA mine 1200015

Current hierarchy: **Jason M  Knies; Joseph R  Knies; Craig J  Knies; Jason M  Knies; Joseph → Cave Quarries Inc → Cave Quarries 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:** Cave Quarries Inc → Cave Quarries Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Knies → Cave Quarries Inc; 1950-01-01 to 2019-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Knies → Cave Quarries Inc; 1950-01-01 to 2019-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Knies → Cave Quarries Inc; 2008-05-01 to 2019-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Knies → Cave Quarries Inc; 2008-05-01 to 2019-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Craig J  Knies et al → Cave Quarries Inc; 2019-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig J  Knies et al → Cave Quarries Inc; 2019-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason M  Knies et al → Cave Quarries Inc; 2019-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Knies et al → Cave Quarries Inc; 2019-11-01 to current/open; source msha-controller-operator-history