# Relationship history for MSHA mine 3600196

Current hierarchy: **New Enterprise Stone & Lime Company Inc → NEW ENTERPRISE STONE & LIME CO., INC. → DRY RUN QUARRY**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** New Enterprise Stone & Lime Co., Inc. → DRY RUN QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** New Enterprise Stone & Lime Company Inc → DRY RUN QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Co., Inc.; 1950-01-01 to current/open; source msha-controller-operator-history