# Relationship history for MSHA mine 4300441

Current hierarchy: **Kenneth F  Davis → Davis Contracting Service → D C S Gravel Pit**

- 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:** Davis Contracting Service → D C S Gravel Pit; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth F  Davis → D C S Gravel Pit; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth F  Davis → Davis Contracting Service; 1989-10-01 to current/open; source msha-controller-operator-history