# Relationship history for MSHA mine 1400495

Current hierarchy: **Douglas K  Hoskinson; Greg  Hoskinson → Hoskinson Sand & Gravel → Hoskinson Sand And Gravel**

- 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:** Hoskinson Sand & Gravel → Hoskinson Sand And Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Hoskinson et al → Hoskinson Sand And Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Hoskinson et al → Hoskinson Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas K  Hoskinson et al → Hoskinson Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history