# Relationship history for MSHA mine 0202607

Current hierarchy: **State Of Arizona → Wellton Mohawk Irrigation & Drainage District → FINLEY GRAVEL SCREEN**

- 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

- **controller_controls_mine:** State Of Arizona → FINLEY GRAVEL SCREEN; 1993-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wellton Mohawk Irrigation & Drainage District → FINLEY GRAVEL SCREEN; 1993-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Arizona → Wellton Mohawk Irrigation & Drainage District; 1993-12-01 to current/open; source msha-controller-operator-history