# Relationship history for MSHA mine 0100163

Current hierarchy: **Dewayne  Kennedy; Autumn  Kennedy → Southern Mineral Resources → Arkadelphia**

- 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:** Drummond Company, Inc. → Arkadelphia; 1950-01-01 to 2020-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Drummond Company Inc → Arkadelphia; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Drummond Company Inc → Drummond Company, Inc.; 1950-01-01 to 2020-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Dewayne  Kennedy et al → Arkadelphia; 2016-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Mineral Resources → Arkadelphia; 2020-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dewayne  Kennedy et al → Southern Mineral Resources; 2020-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Autumn  Kennedy et al → Southern Mineral Resources; 2020-01-02 to current/open; source msha-controller-operator-history