# Relationship history for MSHA mine 2402817

Current hierarchy: **Richard  Hoffman; Jim  Evenson → E&H Asphalt → Valley Pit**

- 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:** E&H Asphalt → Valley Pit; 2025-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Evenson et al → Valley Pit; 2025-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Evenson et al → E&H Asphalt; 2025-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Hoffman et al → E&H Asphalt; 2025-05-12 to current/open; source msha-controller-operator-history