# Relationship history for MSHA mine 3302919

Current hierarchy: **Tisci Jackie Lee → Jackie Lee Ltd Inc → Minor Road Plant**

- 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:** Hammond Brothers Gravel → Minor Road Plant; 1950-01-01 to 1984-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Hammond James P & Earl C Et Al → Minor Road Plant; 1950-01-01 to 1984-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Hammond James P & Earl C Et Al → Hammond Brothers Gravel; 1950-01-01 to 1984-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Jackie Lee Ltd Inc → Minor Road Plant; 1984-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tisci Jackie Lee → Minor Road Plant; 1984-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tisci Jackie Lee → Jackie Lee Ltd Inc; 1984-08-01 to current/open; source msha-controller-operator-history