# Relationship history for MSHA mine 4503411

Current hierarchy: **Wayne F  Anderson → W F Anderson Construction Company Inc → STOCKYARD**

- 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:** Wayne F  Anderson → STOCKYARD; 1998-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W F Anderson Construction Company Inc → STOCKYARD; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne F  Anderson → W F Anderson Construction Company Inc; 1999-09-01 to current/open; source msha-controller-operator-history