# Relationship history for MSHA mine 5400376

Current hierarchy: **Carlos  Beltran → Industrias Areneras B & M → Industrias Areneras B & M**

- 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:** Industrias Areneras Bym Inc → Industrias Areneras B & M; 1995-11-01 to 1999-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Marcos  Medina → Industrias Areneras B & M; 1995-11-01 to 1999-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Marcos  Medina → Industrias Areneras Bym Inc; 1995-11-01 to 1999-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Smart Sand & Gravel Corp → Industrias Areneras B & M; 1999-04-05 to 2006-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Diaz Arturo Jr → Industrias Areneras B & M; 1999-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Diaz Arturo Jr → Smart Sand & Gravel Corp; 1999-04-05 to 2006-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Aveneras CB Corp → Industrias Areneras B & M; 2006-09-01 to 2008-09-08; source msha-controller-operator-history
- **controller_controls_mine:** Carlos  Beltran → Industrias Areneras B & M; 2006-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carlos  Beltran → Aveneras CB Corp; 2006-09-01 to 2008-09-08; source msha-controller-operator-history
- **operator_operates_mine:** Industrias Areneras B & M → Industrias Areneras B & M; 2008-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carlos  Beltran → Industrias Areneras B & M; 2008-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carlos  Beltran → Industrias Areneras B & M; 2008-09-09 to current/open; source msha-controller-operator-history