# Relationship history for MSHA mine 3102241

Current hierarchy: **Richard M  Smith; Rex Stuart  Smith → Rex Smith Farms Inc → Smith Farm Pit #2**

- 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:** Richard M  Smith et al → Smith Farm Pit #2; 1997-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rex Smith Farms Inc → Smith Farm Pit #2; 2008-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard M  Smith et al → Rex Smith Farms Inc; 2008-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex Stuart  Smith et al → Rex Smith Farms Inc; 2008-12-19 to current/open; source msha-controller-operator-history