# Relationship history for MSHA mine 2601454

Current hierarchy: **Fred F  Depaoli → Seaberry-Depaoli Construction Company Inc → Hess Sand Pit**

- 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:** Fred F  Depaoli → Hess Sand Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hess Rock Products → Hess Sand Pit; 1978-03-09 to 1978-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Hess Rock Products → Hess Sand Pit; 1978-03-09 to 1978-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Hess Rock Products → Hess Rock Products; 1978-03-09 to 1978-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Seaberry-Depaoli Construction Company Inc → Hess Sand Pit; 1978-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred F  Depaoli → Seaberry-Depaoli Construction Company Inc; 1978-08-01 to current/open; source msha-controller-operator-history