# Relationship history for MSHA mine 2600610

Current hierarchy: **Aaron Mining Ltd → Aaron Mining Inc → Toulon Mill**

- 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:** Toul0n Mills Inc → Toulon Mill; 1950-01-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Toulon Mills Inc → Toulon Mill; 1950-01-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Toulon Mills Inc → Toul0n Mills Inc; 1950-01-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Aaron Mining Ltd → Toulon Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aaron Mining Inc → Toulon Mill; 1978-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron Mining Ltd → Aaron Mining Inc; 1978-05-17 to current/open; source msha-controller-operator-history