# Relationship history for MSHA mine 3609812

Current hierarchy: **Daniel R  Hawbaker → Glenn O. Hawbaker, Inc. → Antrim Aggregate Plant #25**

- 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:** Daniel R  Hawbaker  et al → Antrim Aggregate Plant #25; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glenn O. Hawbaker, Inc. → Antrim Aggregate Plant #25; 2009-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel R  Hawbaker  et al → Glenn O. Hawbaker, Inc.; 2009-11-16 to current/open; source msha-controller-operator-history