# Relationship history for MSHA mine 0102563

Current hierarchy: **Thomas G  Comer  Jr → Limestone Red Bay, Inc. → Winfield Yard**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Blue Ridge Sand & Gravel Inc → Winfield Yard; 1983-11-01 to 2013-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Bob R  Estes → Winfield Yard; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob R  Estes → Blue Ridge Sand & Gravel Inc; 1983-11-01 to 2013-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Thomas G  Comer  Jr → Winfield Yard; 2011-03-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Limestone Red Bay, Inc. → Winfield Yard; 2013-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas G  Comer  Jr → Limestone Red Bay, Inc.; 2013-02-12 to current/open; source msha-controller-operator-history