# Relationship history for MSHA mine 1519381

Current hierarchy: **Keith  Arnett; Lesley  Arnett → Mountain Top Hydroseeding → # 2 Seam Elkhorn**

- 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:** Mountain Top Hydroseeding → # 2 Seam Elkhorn; 2009-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lesley  Arnett et al → # 2 Seam Elkhorn; 2009-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lesley  Arnett et al → Mountain Top Hydroseeding; 2009-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Arnett et al → Mountain Top Hydroseeding; 2009-01-26 to current/open; source msha-controller-operator-history