# Relationship history for MSHA mine 4703920

Current hierarchy: **Jim  Otteman → Summit Sand & Aggregates → Crystal Lake Sand and 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

- **operator_operates_mine:** Crystal Lake Sand and Gravel LLC → Crystal Lake Sand and Gravel; 2022-04-21 to 2025-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Anthony J Konya → Crystal Lake Sand and Gravel; 2022-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony J Konya → Crystal Lake Sand and Gravel LLC; 2022-04-21 to 2025-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Summit Sand & Aggregates → Crystal Lake Sand and Gravel; 2025-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Otteman → Crystal Lake Sand and Gravel; 2025-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Otteman → Summit Sand & Aggregates; 2025-12-22 to current/open; source msha-controller-operator-history