# Relationship history for MSHA mine 4002583

Current hierarchy: **Kittrell Gary → B & B Coal Company → Area #1**

- 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

- **operator_operates_mine:** B & B Coal Company → Area #1; 1980-01-01 to 1980-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Beard R P & Albert Baisley → Area #1; 1980-01-01 to 1980-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Beard R P & Albert Baisley → B & B Coal Company; 1980-01-01 to 1980-10-14; source msha-controller-operator-history
- **operator_operates_mine:** B & B Coal Company → Area #1; 1980-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kittrell Gary → Area #1; 1980-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kittrell Gary → B & B Coal Company; 1980-10-15 to current/open; source msha-controller-operator-history