# Relationship history for MSHA mine 1000922

Current hierarchy: **Lakes Highway District → Lakes Highway District → Lake Highway Pit Shop**

- 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

- **operator_operates_mine:** B & N Construction Inc → Lake Highway Pit Shop; 1950-01-01 to 1978-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Arthur R  Brand → Lake Highway Pit Shop; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur R  Brand → B & N Construction Inc; 1950-01-01 to 1978-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Lakes Highway District → Lake Highway Pit Shop; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lakes Highway District → Lake Highway Pit Shop; 1978-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lakes Highway District → Lakes Highway District; 1978-10-11 to current/open; source msha-controller-operator-history