# Relationship history for MSHA mine 4801689

Current hierarchy: **Frank B.  Lewis; Amy L  Lewis → Lewis Costruction L.C. → CR2**

- 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:** Lewis Costruction L.C. → CR2; 2006-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amy L  Lewis et al → CR2; 2006-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amy L  Lewis et al → Lewis Costruction L.C.; 2006-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank B.  Lewis et al → Lewis Costruction L.C.; 2006-01-23 to current/open; source msha-controller-operator-history