# Relationship history for MSHA mine 0502041

Current hierarchy: **Kent  Cotten → All American Resources LLC → BEAR RIVER Pit**

- 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:** Bear River Sand & Gravel Inc → BEAR RIVER Pit; 1950-01-01 to 1986-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Gann John F → BEAR RIVER Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gann John F → Bear River Sand & Gravel Inc; 1950-01-01 to 1986-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Bear River Sand & Gravel → BEAR RIVER Pit; 1986-09-23 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Weber Cass Estate → BEAR RIVER Pit; 1986-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weber Cass Estate → Bear River Sand & Gravel; 1986-09-23 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Kent  Cotten → BEAR RIVER Pit; 2009-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** All American Resources LLC → BEAR RIVER Pit; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kent  Cotten → All American Resources LLC; 2009-10-01 to current/open; source msha-controller-operator-history