# Relationship history for MSHA mine 1518614

Current hierarchy: **Michael K  Cook; Randy A  Cook → Cook and Sons Mining, Inc. → Cook and Sons No. A-1**

- 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

- **controller_controls_mine:** Randy A  Cook et al → Cook and Sons No. A-1; 2000-11-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cook and Sons Mining, Inc. → Cook and Sons No. A-1; 2003-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy A  Cook et al → Cook and Sons Mining, Inc.; 2003-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K  Cook et al → Cook and Sons Mining, Inc.; 2003-02-24 to current/open; source msha-controller-operator-history