# Relationship history for MSHA mine 4202259

Current hierarchy: **David  Taylor → Miracle Rock Mining & Research → Dry Wash**

- 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:** Miracle Rock Mining & Research → Dry Wash; 1999-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Taylor → Dry Wash; 1999-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Taylor → Miracle Rock Mining & Research; 1999-08-01 to current/open; source msha-controller-operator-history