# Relationship history for MSHA mine 0504810

Current hierarchy: **CIG LLC → Front Range Aggregates LLC → Brighton Plant**

- 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

- **controller_controls_mine:** CIG LLC → Brighton Plant; 2004-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Front Range Aggregates LLC → Brighton Plant; 2005-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CIG LLC → Front Range Aggregates LLC; 2005-03-24 to current/open; source msha-controller-operator-history