# Relationship history for MSHA mine 3901402

Current hierarchy: **Thomas K  Carr → Carr Construction → CARR CONST**

- 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

- **operator_operates_mine:** Carr Construciton → CARR CONST; 1994-08-01 to 2026-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Thomas K  Carr → CARR CONST; 1994-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas K  Carr → Carr Construciton; 1994-08-01 to 2026-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Carr Towing and Construction LLC → CARR CONST; 2026-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas K  Carr → CARR CONST; 2026-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas K  Carr → Carr Towing and Construction LLC; 2026-03-24 to current/open; source msha-controller-operator-history