# Relationship history for MSHA mine 4003146

Current hierarchy: **Chester  Franklin → Dalco Coal Of Tennessee Llc → Mine #2**

- 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:** Chester  Franklin → Mine #2; 1999-01-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dalco Coal Of Tennessee Llc → Mine #2; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Franklin → Dalco Coal Of Tennessee Llc; 1999-09-01 to current/open; source msha-controller-operator-history