# Relationship history for MSHA mine 4202594

Current hierarchy: **Seth Kelly  Lloyd → Deer Valley Sand & Gravel → Deer valley sand & 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Deer Valley Sand & Gravel → Deer valley sand & gravel; 2012-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Seth Kelly  Lloyd → Deer valley sand & gravel; 2012-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Seth Kelly  Lloyd → Deer Valley Sand & Gravel; 2012-06-03 to current/open; source msha-controller-operator-history