# Relationship history for MSHA mine 3609705

Current hierarchy: **Richard  Franzosa → Franzosa Trucking Co Inc → Eagle Rock 1**

- 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:** Franzosa Trucking Co Inc → Eagle Rock 1; 2009-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Franzosa → Eagle Rock 1; 2009-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Franzosa → Franzosa Trucking Co Inc; 2009-02-18 to current/open; source msha-controller-operator-history