# Relationship history for MSHA mine 3102203

Current hierarchy: **Joel M  Boseman; Aubrey (Fred)  Smith → Cool Spring Sand & Gravel Inc → Beacon Tower Pit**

- 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

- **operator_operates_mine:** Cool Spring Sand & Gravel Inc → Beacon Tower Pit; 2005-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aubrey (Fred)  Smith  et al → Beacon Tower Pit; 2005-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aubrey (Fred)  Smith  et al → Cool Spring Sand & Gravel Inc; 2005-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel M  Boseman  et al → Cool Spring Sand & Gravel Inc; 2005-03-02 to current/open; source msha-controller-operator-history