# Relationship history for MSHA mine 4609530

Current hierarchy: **Lucy M  Taylor → Black Water, Inc. → Black Water Auger #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Black Water, Inc. → Black Water Auger #1; 2017-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lucy M  Taylor → Black Water Auger #1; 2017-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucy M  Taylor → Black Water, Inc.; 2017-03-10 to current/open; source msha-controller-operator-history