# Relationship history for MSHA mine 4202044

Current hierarchy: **American Gilsonite Company → AMERICAN GILSONITE COMPANY → COTTONWOOD MINES**

- 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:** Lexco Inc → COTTONWOOD MINES; 1989-03-01 to 2009-08-23; source msha-controller-operator-history
- **controller_controls_mine:** James M  Lekas → COTTONWOOD MINES; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James M  Lekas → Lexco Inc; 1989-03-01 to 2009-08-23; source msha-controller-operator-history
- **controller_controls_mine:** American Gilsonite Company → COTTONWOOD MINES; 1991-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Gilsonite Company → COTTONWOOD MINES; 2009-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Gilsonite Company → American Gilsonite Company; 2009-08-24 to current/open; source msha-controller-operator-history