# Relationship history for MSHA mine 4407037

Current hierarchy: **Bonney  Bright → Bonney Bright Sand Company → BONNEY BRIGHT SAND**

- 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:** Bonney Bright Sand Company → BONNEY BRIGHT SAND; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bonney  Bright → BONNEY BRIGHT SAND; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bonney  Bright → Bonney Bright Sand Company; 2001-08-01 to current/open; source msha-controller-operator-history