# Relationship history for MSHA mine 0404328

Current hierarchy: **Smith Ralph E Jr → United States Tile Company → Log Cabin 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:** Smith Ralph E Jr → Log Cabin Mine; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United States Tile Company → Log Cabin Mine; 1979-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Ralph E Jr → United States Tile Company; 1979-07-01 to current/open; source msha-controller-operator-history