# Relationship history for MSHA mine 2900495

Current hierarchy: **Joel M Perovich → Taos Gravel Products → Tinaja**

- 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:** Taos Gravel Products Inc → Tinaja; 1950-01-01 to 1992-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Beatriz  Gonzales → Tinaja; 1950-01-01 to 1992-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Beatriz  Gonzales → Taos Gravel Products Inc; 1950-01-01 to 1992-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Perovich Properties Inc → Tinaja; 1992-02-06 to 2026-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Joel M Perovich → Tinaja; 1992-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel M Perovich → Perovich Properties Inc; 1992-02-06 to 2026-01-25; source msha-controller-operator-history
- **controller_controls_mine:** Joel M Perovich → Tinaja; 2005-09-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Taos Gravel Products → Tinaja; 2026-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel M Perovich → Taos Gravel Products; 2026-01-26 to current/open; source msha-controller-operator-history