# Relationship history for MSHA mine 4103814

Current hierarchy: **Rocha Juan Gerardo → Rocha Mine → Hueco Quarry**

- 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:** Rocha Mine → Hueco Quarry; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rocha Juan Gerardo → Hueco Quarry; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rocha Juan Gerardo → Rocha Mine; 1994-04-01 to current/open; source msha-controller-operator-history