# Relationship history for MSHA mine 5400141

Current hierarchy: **Adriel Colon  Colon → Cantera Green → CANTERA GREEN**

- 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:** Arco Stone Corp → CANTERA GREEN; 1950-01-01 to 1988-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Ramon Rodriguez  Torres → CANTERA GREEN; 1950-01-01 to 1988-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Ramon Rodriguez  Torres → Arco Stone Corp; 1950-01-01 to 1988-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Green → CANTERA GREEN; 1988-06-01 to 1991-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Angel M Colon  Mora → CANTERA GREEN; 1988-06-01 to 1991-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Angel M Colon  Mora → Cantera Green; 1988-06-01 to 1991-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Green → CANTERA GREEN; 1991-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adriel Colon  Colon → CANTERA GREEN; 1991-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adriel Colon  Colon → Cantera Green; 1991-10-16 to current/open; source msha-controller-operator-history