# Relationship history for MSHA mine 3609841

Current hierarchy: **Randy S  Glover → Glover Stone → Colwell Portable**

- 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:** Glover Stone → Colwell Portable; 2010-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy S  Glover → Colwell Portable; 2010-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy S  Glover → Glover Stone; 2010-03-24 to current/open; source msha-controller-operator-history