# Relationship history for MSHA mine 1102582

Current hierarchy: **Winnebago County-Il → Winnebago County Highway Department → Thompson Quarry**

- 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:** Winnebago County-Il → Thompson Quarry; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Winnebago County Highway Department → Thompson Quarry; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Winnebago County-Il → Winnebago County Highway Department; 1981-06-01 to current/open; source msha-controller-operator-history