# Relationship history for MSHA mine 2103857

Current hierarchy: **Brian  Cook → Cook Construction LLC → Screener 1**

- 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:** Cook Construction LLC → Screener 1; 2015-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Cook → Screener 1; 2015-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Cook → Cook Construction LLC; 2015-05-29 to current/open; source msha-controller-operator-history