# Relationship history for MSHA mine 3607576

Current hierarchy: **Estate of Joseph A Kuperavage Sr; Robert T  Kuperavage → Joseph Kuperavage Coal Company → Brockton Stripping**

- 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

- **controller_controls_mine:** Joseph  Kuperavage et al → Brockton Stripping; 1950-01-01 to 2021-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Joseph Kuperavage Coal Company → Brockton Stripping; 1984-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Kuperavage et al → Joseph Kuperavage Coal Company; 1984-05-01 to 2021-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Kuperavage et al → Joseph Kuperavage Coal Company; 1984-05-01 to 2021-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Robert T  Kuperavage et al → Brockton Stripping; 2021-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert T  Kuperavage et al → Joseph Kuperavage Coal Company; 2021-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Estate of Joseph A Kuperavage Sr et al → Joseph Kuperavage Coal Company; 2021-05-24 to current/open; source msha-controller-operator-history