# Relationship history for MSHA mine 1401800

Current hierarchy: **Donald  Brooks; David Steven  Brooks → Brooks Directional Drilling LLC → Brooks Directional Drilling LLC**

- 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:** Brooks Directional Drilling LLC → Brooks Directional Drilling LLC; 2019-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David Steven  Brooks et al → Brooks Directional Drilling LLC; 2019-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Steven  Brooks et al → Brooks Directional Drilling LLC; 2019-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Brooks et al → Brooks Directional Drilling LLC; 2019-02-26 to current/open; source msha-controller-operator-history