# Relationship history for MSHA mine 4103163

Current hierarchy: **Rios Jacinto → Rios Caliche Pit → Rios 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:** A & R Caliche Pit → Rios Caliche Pit; 1983-03-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Aguirre Armondo → Rios Caliche Pit; 1983-03-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Aguirre Armondo → A & R Caliche Pit; 1983-03-01 to 1983-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Rios Caliche Pit → Rios Caliche Pit; 1983-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rios Jacinto → Rios Caliche Pit; 1983-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rios Jacinto → Rios Caliche Pit; 1983-08-04 to current/open; source msha-controller-operator-history