# Relationship history for MSHA mine 0405598

Current hierarchy: **Hi-Grade Materials Company; Jason  Courville → JaCore Aggregates LLC → JaCore Aggregates LLC**

- 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:** JC Materials → JaCore Aggregates LLC; 2004-06-09 to 2007-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Jason E  Courville → JaCore Aggregates LLC; 2004-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason E  Courville → JC Materials; 2004-06-09 to 2007-02-11; source msha-controller-operator-history
- **operator_operates_mine:** JaCore Aggregates LLC → JaCore Aggregates LLC; 2007-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Courville et al → JaCore Aggregates LLC; 2007-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Courville et al → JaCore Aggregates LLC; 2007-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hi-Grade Materials Company et al → JaCore Aggregates LLC; 2007-02-12 to current/open; source msha-controller-operator-history