# Relationship history for MSHA mine 4103980

Current hierarchy: **Rogers Darwin → D Rogers Trucking → D. ROGERS TRUCKING**

- 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:** K & S Materials Llc → D. ROGERS TRUCKING; 1998-01-01 to 1999-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Dixon Keith → D. ROGERS TRUCKING; 1998-01-01 to 1999-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Dixon Keith → K & S Materials Llc; 1998-01-01 to 1999-10-05; source msha-controller-operator-history
- **operator_operates_mine:** D Rogers Trucking → D. ROGERS TRUCKING; 1999-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Darwin → D. ROGERS TRUCKING; 1999-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Darwin → D Rogers Trucking; 1999-10-06 to current/open; source msha-controller-operator-history