# Relationship history for MSHA mine 2500929

Current hierarchy: **Schultz James W → Cedar Sand & Gravel → Liese Pit And Plant No 2**

- 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:** Schultz James W → Liese Pit And Plant No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Sand & Gravel → Liese Pit And Plant No 2; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schultz James W → Cedar Sand & Gravel; 1979-01-01 to current/open; source msha-controller-operator-history