# Relationship history for MSHA mine 3003505

Current hierarchy: **Robert  Zaloski → High Peaks Sand and Gravel → HIGH PEAKS SAND & GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** W J  Bokus → HIGH PEAKS SAND & GRAVEL; 1984-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W. J. Bokus Industries, Inc. → HIGH PEAKS SAND & GRAVEL; 2006-05-12 to 2023-01-03; source msha-controller-operator-history
- **controller_controls_operator:** W J  Bokus → W. J. Bokus Industries, Inc.; 2006-05-12 to 2023-01-03; source msha-controller-operator-history
- **operator_operates_mine:** High Peaks Sand and Gravel → HIGH PEAKS SAND & GRAVEL; 2023-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Zaloski → HIGH PEAKS SAND & GRAVEL; 2023-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Zaloski → High Peaks Sand and Gravel; 2023-01-04 to current/open; source msha-controller-operator-history