# Relationship history for MSHA mine 0405901

Current hierarchy: **Hoopa Valley Tribe → Hoopa Roads Aggregate and Ready Mix → Hoopa Valley Tribe Roads Department**

- 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:** Hoopa Roads Aggregate and Ready Mix → Hoopa Valley Tribe Roads Department; 2015-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** United States Government → Hoopa Valley Tribe Roads Department; 2015-06-24 to 2025-10-31; source msha-controller-operator-history
- **controller_controls_operator:** United States Government → Hoopa Roads Aggregate and Ready Mix; 2015-06-24 to 2025-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Hoopa Valley Tribe → Hoopa Valley Tribe Roads Department; 2025-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hoopa Valley Tribe → Hoopa Roads Aggregate and Ready Mix; 2025-11-01 to current/open; source msha-controller-operator-history