# Relationship history for MSHA mine 1301524

Current hierarchy: **Manaco Corporation → Wendling Quarries Inc → Portable Crushing Dept 440**

- 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:** Wendling Quarries Inc → Portable Crushing Dept 440; 1950-01-01 to 1983-11-17; source msha-controller-operator-history
- **controller_controls_mine:** B W  Carpenter  et al → Portable Crushing Dept 440; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** B W  Carpenter  et al → Wendling Quarries Inc; 1950-01-01 to 1983-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Reid E  Kuhlman et al → Portable Crushing Dept 440; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kuhlman Construction Company → Portable Crushing Dept 440; 1983-11-18 to 2002-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Reid E  Kuhlman et al → Kuhlman Construction Company; 1983-11-18 to 2002-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Rick L  Kuhlman et al → Kuhlman Construction Company; 1983-11-18 to 2002-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Manaco Corporation → Portable Crushing Dept 440; 1987-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wendling Quarries Inc → Portable Crushing Dept 440; 2002-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Manaco Corporation → Wendling Quarries Inc; 2002-08-09 to current/open; source msha-controller-operator-history