# Relationship history for MSHA mine 1302131

Current hierarchy: **Rick L  Kuhlman; Reid E  Kuhlman → Kuhlman Construction Company → Log Washer Portable - Number 5**

- 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

- **controller_controls_mine:** Rick L  Kuhlman et al → Log Washer Portable - Number 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kuhlman Construction Company → Log Washer Portable - Number 5; 1985-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick L  Kuhlman et al → Kuhlman Construction Company; 1985-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reid E  Kuhlman et al → Kuhlman Construction Company; 1985-08-01 to current/open; source msha-controller-operator-history