# Relationship history for MSHA mine 0404828

Current hierarchy: **Brush Creek Mining & Development Company Inc → Brush Creek Joint Venture → Gardner'S Point Mine**

- 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:** Brush Creek Joint Venture → Gardner'S Point Mine; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brush Creek Mining & Development Company Inc → Gardner'S Point Mine; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brush Creek Mining & Development Company Inc → Brush Creek Joint Venture; 1986-08-01 to current/open; source msha-controller-operator-history