# Relationship history for MSHA mine 3700086

Current hierarchy: **Malafronte Roney A → Universal Truck & Equipment Leasing Inc → UNIVERSAL TRK & EQUIP LEASING IN**

- 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:** Valley Ready Mixed Concrete Company Inc → UNIVERSAL TRK & EQUIP LEASING IN; 1950-01-01 to 1989-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Lawson Edward R → UNIVERSAL TRK & EQUIP LEASING IN; 1950-01-01 to 1989-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Lawson Edward R → Valley Ready Mixed Concrete Company Inc; 1950-01-01 to 1989-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Universal Truck & Equipment Leasing Inc → UNIVERSAL TRK & EQUIP LEASING IN; 1989-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Malafronte Roney A → UNIVERSAL TRK & EQUIP LEASING IN; 1989-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Malafronte Roney A → Universal Truck & Equipment Leasing Inc; 1989-03-08 to current/open; source msha-controller-operator-history