# Relationship history for MSHA mine 3604372

Current hierarchy: **New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Co., Inc. → Kutztown II 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** New Enterprise Stone & Lime Company Inc → Kutztown II Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John R  Hannon → Kutztown II Quarry; 1950-01-01 to 2014-04-13; source msha-controller-operator-history
- **operator_operates_mine:** Keystone Quarry Company → Kutztown II Quarry; 1950-01-01 to 1979-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Ruth E  Winters → Kutztown II Quarry; 1950-01-01 to 1979-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Ruth E  Winters → Keystone Quarry Company; 1950-01-01 to 1979-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Berks Products Corp → Kutztown II Quarry; 1979-12-11 to 2017-02-10; source msha-controller-operator-history
- **controller_controls_operator:** John R  Hannon → Berks Products Corp; 1979-12-11 to 2014-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Nielsen → Kutztown II Quarry; 2014-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Nielsen → Berks Products Corp; 2014-04-14 to 2017-02-10; source msha-controller-operator-history
- **operator_operates_mine:** New Enterprise Stone & Lime Co., Inc. → Kutztown II Quarry; 2017-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Co., Inc.; 2017-02-11 to current/open; source msha-controller-operator-history