# Relationship history for MSHA mine 1200094

Current hierarchy: **Polycor Inc → IN Limestone Co → Central 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Victor Oolitic Stone Company → Central Quarry; 1978-11-01 to 2009-11-30; source msha-controller-operator-history
- **controller_controls_mine:** John R  Edgeworth → Central Quarry; 1978-11-01 to 2007-03-27; source msha-controller-operator-history
- **controller_controls_operator:** John R  Edgeworth → Victor Oolitic Stone Company; 1978-11-01 to 2007-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Audax Group et al → Central Quarry; 2007-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Audax Group et al → Victor Oolitic Stone Company; 2007-03-28 to 2009-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Indiana Limestone Company → Central Quarry; 2009-12-01 to 2014-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Resilience Capital Partners → Central Quarry; 2009-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Resilience Capital Partners → Indiana Limestone Company; 2009-12-01 to 2014-05-01; source msha-controller-operator-history
- **operator_operates_mine:** IN Limestone Co → Central Quarry; 2014-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Limestone Holdings Corporation → Central 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 → Central 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 → Central 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