# Relationship history for MSHA mine 0405433

Current hierarchy: **Steve  Elder; Charles  Vertrees → Blue Point Rock Products → BLUE 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:** Blue Point Rock Products → BLUE POINT MINE; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Vertrees  et al → BLUE POINT MINE; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Vertrees  et al → Blue Point Rock Products; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Elder  et al → Blue Point Rock Products; 2000-03-01 to current/open; source msha-controller-operator-history