# Relationship history for MSHA mine 3610139

Current hierarchy: **Robert E  Brown; Allan M  Brown → EM Brown Inc → EM Brown Strips**

- 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:** Robert E  Brown et al → EM Brown Strips; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** EM Brown Inc → EM Brown Strips; 2016-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Brown et al → EM Brown Inc; 2016-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allan M  Brown et al → EM Brown Inc; 2016-04-21 to current/open; source msha-controller-operator-history