# Relationship history for MSHA mine 3610000

Current hierarchy: **Daniel R  Hawbaker → Glenn O. Hawbaker, Inc. → Casella McKean Aggregate Plant #40**

- 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 → Casella McKean Aggregate Plant #40; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glenn O. Hawbaker, Inc. → Casella McKean Aggregate Plant #40; 2012-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel R  Hawbaker  et al → Glenn O. Hawbaker, Inc.; 2012-04-26 to current/open; source msha-controller-operator-history