# Relationship history for MSHA mine 4103387

Current hierarchy: **Wages Ron → Dallas Mining Company Inc → Dallas Mining Company Incorporated**

- 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

- **operator_operates_mine:** D & J Sand & Gravel Pit → Dallas Mining Company Incorporated; 1986-02-01 to 1989-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Lewis Jerry → Dallas Mining Company Incorporated; 1986-02-01 to 1989-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Lewis Jerry → D & J Sand & Gravel Pit; 1986-02-01 to 1989-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Dallas Mining Company Inc → Dallas Mining Company Incorporated; 1989-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wages Ron → Dallas Mining Company Incorporated; 1989-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wages Ron → Dallas Mining Company Inc; 1989-07-10 to current/open; source msha-controller-operator-history