# Relationship history for MSHA mine 4103269

Current hierarchy: **Vela Richardo → Northwestern Caliche → Northwestern Caliche 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:** C & T Cattle Company → Northwestern Caliche Pit; 1984-11-01 to 1989-05-02; source msha-controller-operator-history
- **controller_controls_mine:** Castillano Joe M → Northwestern Caliche Pit; 1984-11-01 to 1989-05-02; source msha-controller-operator-history
- **controller_controls_operator:** Castillano Joe M → C & T Cattle Company; 1984-11-01 to 1989-05-02; source msha-controller-operator-history
- **operator_operates_mine:** Northwestern Caliche → Northwestern Caliche Pit; 1989-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vela Richardo → Northwestern Caliche Pit; 1989-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vela Richardo → Northwestern Caliche; 1989-05-03 to current/open; source msha-controller-operator-history