# Relationship history for MSHA mine 1002150

Current hierarchy: **Bill  Maxwell; Charles  Maxwell → Owyhee Sand & Gravel LLC → Owyhee Sand & Gravel LLC**

- 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:** Owyhee Sand & Gravel LLC → Owyhee Sand & Gravel LLC; 2008-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Maxwell et al → Owyhee Sand & Gravel LLC; 2008-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Maxwell et al → Owyhee Sand & Gravel LLC; 2008-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Maxwell et al → Owyhee Sand & Gravel LLC; 2008-03-10 to current/open; source msha-controller-operator-history