# Relationship history for MSHA mine 3002541

Current hierarchy: **Joseph T  Ferdula → Ferdula Gravel Products Inc → Millers Mill 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

- **operator_operates_mine:** Ferdula Gravel Products Inc → Millers Mill Pit; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph T  Ferdula → Millers Mill Pit; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph T  Ferdula → Ferdula Gravel Products Inc; 1980-07-01 to current/open; source msha-controller-operator-history