# Relationship history for MSHA mine 3610239

Current hierarchy: **Clayton M Force → Forces Stone and Landscape Supply → Carlson 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

- **controller_controls_mine:** Clayton M Force → Carlson Quarry; 2018-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Forces Stone and Landscape Supply → Carlson Quarry; 2018-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clayton M Force → Forces Stone and Landscape Supply; 2018-05-10 to current/open; source msha-controller-operator-history