# Relationship history for MSHA mine 0203067

Current hierarchy: **John W  Riley; Mary Ann  Riley → Gimez (Arizona) Inc. → Gimez (Arizona) Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Gimez (Arizona) Inc. → Gimez (Arizona) Inc.; 2004-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John W  Riley et al → Gimez (Arizona) Inc.; 2004-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Riley et al → Gimez (Arizona) Inc.; 2004-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary Ann  Riley et al → Gimez (Arizona) Inc.; 2004-08-01 to current/open; source msha-controller-operator-history