# Relationship history for MSHA mine 0301867

Current hierarchy: **Danny  Hansbrough → Ouachita Rock, Inc. → Ouachita Rock Portable**

- 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

- **controller_controls_mine:** Danny  Hansbrough → Ouachita Rock Portable; 1998-05-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ouachita Rock, Inc. → Ouachita Rock Portable; 2002-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Hansbrough → Ouachita Rock, Inc.; 2002-08-15 to current/open; source msha-controller-operator-history