# Relationship history for MSHA mine 3300115

Current hierarchy: **Colas S A → Barrett Paving Materials Inc → Barrett Paving Materials Inc**

- 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:** Miami River Stone Company → Barrett Paving Materials Inc; 1950-01-01 to 2008-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Milligan → Barrett Paving Materials Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Milligan → Miami River Stone Company; 1950-01-01 to 2008-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Barrett Paving Materials Inc; 1979-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barrett Paving Materials Inc → Barrett Paving Materials Inc; 2008-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Barrett Paving Materials Inc; 2008-07-08 to current/open; source msha-controller-operator-history