# Relationship history for MSHA mine 3609139

Current hierarchy: **Larry A  Schaefer → Star Pond LLC → Star Pond-Willoway Quarry**

- 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:** Star Pond LLC → Star Pond-Willoway Quarry; 2003-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry A  Schaefer et al → Star Pond-Willoway Quarry; 2003-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry A  Schaefer et al → Star Pond LLC; 2003-04-23 to current/open; source msha-controller-operator-history