# Relationship history for MSHA mine 0202765

Current hierarchy: **James G  Bechtel; Zora R  Bechtel → Pinal Harvesting → Coolidge Plant**

- 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:** Pinal Harvesting → Coolidge Plant; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James G  Bechtel et al → Coolidge Plant; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James G  Bechtel et al → Pinal Harvesting; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zora R  Bechtel et al → Pinal Harvesting; 1998-04-01 to current/open; source msha-controller-operator-history