# Relationship history for MSHA mine 5400119

Current hierarchy: **Carlos I  Rivera; Norma I  Tirado → Cantera Rivera, Inc. → Cantera Rivera**

- 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:** Cantera Rocruz Inc → Cantera Rivera; 1950-01-01 to 2004-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Diana E  Cruz → Cantera Rivera; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Diana E  Cruz → Cantera Rocruz Inc; 1950-01-01 to 2004-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Rivera, Inc. → Cantera Rivera; 2004-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Norma I  Tirado  et al → Cantera Rivera; 2004-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norma I  Tirado  et al → Cantera Rivera, Inc.; 2004-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carlos I  Rivera  et al → Cantera Rivera, Inc.; 2004-09-15 to current/open; source msha-controller-operator-history