# Relationship history for MSHA mine 4103148

Current hierarchy: **Garza Pete → Garza Sand Pit Inc Of Texas → Garza Sand Pit Incorporated Of Texas**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Allied Sand Pit → Garza Sand Pit Incorporated Of Texas; 1983-01-01 to 1986-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Uribe Alonzo R → Garza Sand Pit Incorporated Of Texas; 1983-01-01 to 1986-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Uribe Alonzo R → Allied Sand Pit; 1983-01-01 to 1986-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Garza Sand Pit Inc Of Texas → Garza Sand Pit Incorporated Of Texas; 1986-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garza Pete → Garza Sand Pit Incorporated Of Texas; 1986-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garza Pete → Garza Sand Pit Inc Of Texas; 1986-02-21 to current/open; source msha-controller-operator-history