# Relationship history for MSHA mine 0202826

Current hierarchy: **Yavapai-Apache Nation → Yavapai Apache Sand & Rock → Yavapai Apache Sand & Rock**

- 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:** Yavapai Apache Sand & Rock → Yavapai Apache Sand & Rock; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yavapai-Apache Nation → Yavapai Apache Sand & Rock; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yavapai-Apache Nation → Yavapai Apache Sand & Rock; 1999-06-01 to current/open; source msha-controller-operator-history