# Relationship history for MSHA mine 3600134

Current hierarchy: **New Enterprise Stone & Lime Company Inc; New Enterprise Stone & Lime Com → Eastern Industries Inc → Lehigh Quarry #117**

- 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:** Stabler Companies Inc → Lehigh Quarry #117; 1950-01-01 to 2008-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Lehigh Stone Company → Lehigh Quarry #117; 1950-01-01 to 1980-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Mengel Elmer A → Lehigh Quarry #117; 1950-01-01 to 1980-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Mengel Elmer A → Lehigh Stone Company; 1950-01-01 to 1980-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Lehigh Stone Company Inc → Lehigh Quarry #117; 1980-06-10 to 1988-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Hoppes Floyd J → Lehigh Quarry #117; 1980-06-10 to 1988-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Hoppes Floyd J → Lehigh Stone Company Inc; 1980-06-10 to 1988-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Industries Inc → Lehigh Quarry #117; 1988-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stabler Companies Inc → Eastern Industries Inc; 1988-03-07 to 2008-01-31; source msha-controller-operator-history
- **controller_controls_mine:** New Enterprise Stone & Lime Company Inc → Lehigh Quarry #117; 2008-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** New Enterprise Stone & Lime Company Inc → Eastern Industries Inc; 2008-02-01 to current/open; source msha-controller-operator-history