# Relationship history for MSHA mine 4608061

Current hierarchy: **Noble George → Peres Processing Inc → Glen Alum Preparation Plant**

- 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:** Tracy W  Hylton II → Glen Alum Preparation Plant; 1988-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Min Inc → Glen Alum Preparation Plant; 1991-07-01 to 1991-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Tracy W  Hylton II → Min Inc; 1991-07-01 to 1991-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Peres Processing Inc → Glen Alum Preparation Plant; 1991-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Noble George → Glen Alum Preparation Plant; 1991-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Noble George → Peres Processing Inc; 1991-08-06 to current/open; source msha-controller-operator-history