# Relationship history for MSHA mine 4104327

Current hierarchy: **Humberto  Fraire → JRB Materials & Construction Inc → Purple Mountain Sand Co.**

- 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:** Villegas & Sons, Inc. → Purple Mountain Sand Co.; 2001-11-19 to 2012-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Joe A  Villegas → Purple Mountain Sand Co.; 2001-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe A  Villegas → Villegas & Sons, Inc.; 2001-11-19 to 2012-05-07; source msha-controller-operator-history
- **operator_operates_mine:** JRB Materials & Construction Inc → Purple Mountain Sand Co.; 2012-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Humberto  Fraire → Purple Mountain Sand Co.; 2012-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Humberto  Fraire → JRB Materials & Construction Inc; 2012-05-08 to current/open; source msha-controller-operator-history