# Relationship history for MSHA mine 1514289

Current hierarchy: **Crawford Kenneth → Four C Coal Company → Mine No 9**

- 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:** Crawford Kenneth Et Al → Mine No 9; 1983-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Four C Coal Company → Mine No 9; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Kenneth Et Al → Four C Coal Company; 1983-10-01 to current/open; source msha-controller-operator-history