# Relationship history for MSHA mine 2800508

Current hierarchy: **Frank  Rosano → Rosano Trucking Inc → FRED MCDOWELL INC ROSANO TRUCKIN**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Fred Mc Dowell Inc → FRED MCDOWELL INC ROSANO TRUCKIN; 1950-01-01 to 1994-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Fred  McDowell → FRED MCDOWELL INC ROSANO TRUCKIN; 1950-01-01 to 1994-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Fred  McDowell → Fred Mc Dowell Inc; 1950-01-01 to 1994-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Rosano Trucking Inc → FRED MCDOWELL INC ROSANO TRUCKIN; 1994-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Rosano → FRED MCDOWELL INC ROSANO TRUCKIN; 1994-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Rosano → Rosano Trucking Inc; 1994-08-15 to current/open; source msha-controller-operator-history