# Relationship history for MSHA mine 2902420

Current hierarchy: **Erika P Holguin → Plano Enterprises LLC aka Plano Ent LLC → Albuquerque 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Albuquerque Development LLC → Albuquerque Pit; 2011-11-16 to 2016-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Lorretta  Chavez → Albuquerque Pit; 2011-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lorretta  Chavez → Albuquerque Development LLC; 2011-11-16 to 2016-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Bedrock Sand and Gravel LLC. → Albuquerque Pit; 2016-02-02 to 2021-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Christina  Argyres et al → Albuquerque Pit; 2016-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christina  Argyres et al → Bedrock Sand and Gravel LLC.; 2016-02-02 to 2021-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Carlos  Villanueva et al → Bedrock Sand and Gravel LLC.; 2016-02-02 to 2021-11-21; source msha-controller-operator-history
- **operator_operates_mine:** Plano Enterprises LLC → Albuquerque Pit; 2021-11-22 to 2022-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Jose Manuel  Diharce → Albuquerque Pit; 2021-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose Manuel  Diharce → Plano Enterprises LLC; 2021-11-22 to 2022-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Plano Enterprises LLC aka Plano Ent LLC → Albuquerque Pit; 2022-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Erika P Holguin → Albuquerque Pit; 2022-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Erika P Holguin → Plano Enterprises LLC aka Plano Ent LLC; 2022-04-12 to current/open; source msha-controller-operator-history