# Relationship history for MSHA mine 2602616

Current hierarchy: **Big 7 Ventures LLC → Big 7 Modern Concrete LLC → Fraser Pit**

- 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:** Modern Concrete Inc → Fraser Pit; 2007-06-26 to 2025-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Scott W  Reutner → Fraser Pit; 2007-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott W  Reutner → Modern Concrete Inc; 2007-06-26 to 2025-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Big 7 Modern Concrete LLC → Fraser Pit; 2025-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Big 7 Ventures LLC → Fraser Pit; 2025-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Big 7 Ventures LLC → Big 7 Modern Concrete LLC; 2025-02-01 to current/open; source msha-controller-operator-history