# Relationship history for MSHA mine 3606989

Current hierarchy: **Hoover Diane → Hoover Aggregates Inc → Edinboro 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

- **controller_controls_mine:** Tucci Frank → Edinboro Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Edinboro Gravel Company → Edinboro Plant; 1980-05-01 to 1989-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Tucci Frank → Edinboro Gravel Company; 1980-05-01 to 1989-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Hoover Aggregates Inc → Edinboro Plant; 1989-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hoover Diane → Edinboro Plant; 1989-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hoover Diane → Hoover Aggregates Inc; 1989-10-03 to current/open; source msha-controller-operator-history