# Relationship history for MSHA mine 1201061

Current hierarchy: **Polycor Inc → IN Limestone Co → Empire 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:** Indiana Limestone Company Inc → Empire Quarry; 1950-01-01 to 1987-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Kluesner Hugh → Empire Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kluesner Hugh → Indiana Limestone Company Inc; 1950-01-01 to 1987-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Tucker John D Et Al → Empire Quarry; 1986-01-06 to 2002-12-22; source msha-controller-operator-history
- **operator_operates_mine:** Indiana Limestone Company Incorporated → Empire Quarry; 1987-06-11 to 2011-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Tucker John D Et Al → Indiana Limestone Company Incorporated; 1987-06-11 to 2002-12-22; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Ventures II Incorporated → Empire Quarry; 2002-12-23 to 2010-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Ventures II Incorporated → Indiana Limestone Company Incorporated; 2002-12-23 to 2010-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Resilience Capital Partners → Empire Quarry; 2009-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Resilience Capital Partners → Empire Quarry; 2010-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Resilience Capital Partners → Indiana Limestone Company Incorporated; 2010-11-15 to 2011-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Indiana Limestone Company Incorporated → Empire Quarry; 2011-06-16 to 2014-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Resilience Capital Partners → Indiana Limestone Company Incorporated; 2011-06-16 to 2014-05-01; source msha-controller-operator-history
- **operator_operates_mine:** IN Limestone Co → Empire Quarry; 2014-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Limestone Holdings Corporation → Empire Quarry; 2014-05-02 to 2014-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Limestone Holdings Corporation → IN Limestone Co; 2014-05-02 to 2014-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Wynnchurch Capital → Empire Quarry; 2014-05-13 to 2018-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Wynnchurch Capital → IN Limestone Co; 2014-05-13 to 2018-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Polycor Inc → Empire Quarry; 2018-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Polycor Inc → IN Limestone Co; 2018-10-11 to current/open; source msha-controller-operator-history