# Relationship history for MSHA mine 1301846

Current hierarchy: **Rick L  Kuhlman; Reid E  Kuhlman → Kuhlman Construction Company → Logan Sand 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

- **controller_controls_mine:** B W  Carpenter  et al → Logan Sand Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick L  Kuhlman et al → Logan Sand Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wendling Quarries Inc → Logan Sand Pit; 1978-03-09 to 1982-11-17; source msha-controller-operator-history
- **controller_controls_operator:** B W  Carpenter  et al → Wendling Quarries Inc; 1978-03-09 to 1982-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Kuhlman Construction Company → Logan Sand Pit; 1982-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick L  Kuhlman et al → Kuhlman Construction Company; 1982-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reid E  Kuhlman et al → Kuhlman Construction Company; 1982-11-18 to current/open; source msha-controller-operator-history