# Relationship history for MSHA mine 1519237

Current hierarchy: **Thomas  Brueggemann → Otter Creek Mining LLC → Otter Creek Mine No. 1 Surface**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Otter Creek Mining LLC → Otter Creek Mine No. 1 Surface; 2008-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Brueggemann → Otter Creek Mine No. 1 Surface; 2008-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Brueggemann → Otter Creek Mining LLC; 2008-05-23 to current/open; source msha-controller-operator-history