# Relationship history for MSHA mine 4103775

Current hierarchy: **Dal-Tile International Inc → Dal-Minerals Company → COLEMAN CLAY MINE**

- 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

- **controller_controls_mine:** Dal-Tile International Inc → COLEMAN CLAY MINE; 1990-01-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dal-Minerals Company → COLEMAN CLAY MINE; 1993-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dal-Tile International Inc → Dal-Minerals Company; 1993-06-01 to current/open; source msha-controller-operator-history