# Relationship history for MSHA mine 3600038

Current hierarchy: **New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Co., Inc. → Hinkletown 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

- **controller_controls_mine:** New Enterprise Stone & Lime Company Inc → Hinkletown Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** David M Burkholder Inc → Hinkletown Quarry; 1950-01-01 to 1982-09-28; source msha-controller-operator-history
- **controller_controls_mine:** Eugene M  Burkholder → Hinkletown Quarry; 1950-01-01 to 1982-09-28; source msha-controller-operator-history
- **controller_controls_operator:** Eugene M  Burkholder → David M Burkholder Inc; 1950-01-01 to 1982-09-28; source msha-controller-operator-history
- **operator_operates_mine:** Martin Limestone Inc → Hinkletown Quarry; 1982-09-29 to 2010-08-04; source msha-controller-operator-history
- **controller_controls_operator:** New Enterprise Stone & Lime Company Inc → Martin Limestone Inc; 1982-09-29 to 2010-08-04; source msha-controller-operator-history
- **operator_operates_mine:** New Enterprise Stone & Lime Co., Inc. → Hinkletown Quarry; 2010-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Co., Inc.; 2010-08-05 to current/open; source msha-controller-operator-history