# Relationship history for MSHA mine 1202005

Current hierarchy: **Polycor Inc → IN Limestone Co → Eureka Underground**

- 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:** Elliott Mineral Extraction Inc → Eureka Underground; 1987-06-01 to 2019-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Cindy  Elliott et al → Eureka Underground; 1987-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cindy  Elliott et al → Elliott Mineral Extraction Inc; 1987-06-01 to 2019-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Elliott et al → Elliott Mineral Extraction Inc; 1987-06-01 to 2019-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Limestone Holdings Corporation → Eureka Underground; 2014-05-02 to 2014-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Wynnchurch Capital → Eureka Underground; 2014-05-13 to 2018-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Polycor Inc → Eureka Underground; 2018-10-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** IN Limestone Co → Eureka Underground; 2019-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Limestone Holdings Corporation → IN Limestone Co; 2019-10-01 to 2014-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Wynnchurch Capital → IN Limestone Co; 2019-10-01 to 2018-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Polycor Inc → IN Limestone Co; 2019-10-01 to current/open; source msha-controller-operator-history