# Relationship history for MSHA mine 3301512

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

- 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:** Hilltop Basic Resources Inc → Barrett Paving Materials Inc - Medway; 1950-01-01 to 2003-12-17; source msha-controller-operator-history
- **controller_controls_mine:** John F  Steele Jr → Barrett Paving Materials Inc - Medway; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John F  Steele Jr → Hilltop Basic Resources Inc; 1950-01-01 to 2003-12-17; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Barrett Paving Materials Inc - Medway; 1979-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Riverbend sand and gravel corporation → Barrett Paving Materials Inc - Medway; 2003-12-18 to 2004-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Barrett Paving Materials Inc - Medway; 2003-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Riverbend sand and gravel corporation; 2003-12-18 to 2004-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Barrett Paving Materials Inc → Barrett Paving Materials Inc - Medway; 2004-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Barrett Paving Materials Inc; 2004-04-01 to current/open; source msha-controller-operator-history