# Relationship history for MSHA mine 3800703

Current hierarchy: **Niles Ray  Brown → Quality Haulers Inc → BROWN SAND MINE NO. 2**

- 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:** Quality Haulers Inc → BROWN SAND MINE NO. 2; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Niles Ray  Brown → BROWN SAND MINE NO. 2; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Niles Ray  Brown → Quality Haulers Inc; 2001-07-01 to current/open; source msha-controller-operator-history