# Relationship history for MSHA mine 3607394

Current hierarchy: **New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Company Inc → OGLETOWN 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:** Standard Slag Company → OGLETOWN QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** New Enterprise Stone & Lime Company Inc → OGLETOWN QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Standard Slag Company → OGLETOWN QUARRY; 1982-11-01 to 1989-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Standard Slag Company → Standard Slag Company; 1982-11-01 to 1989-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Standard Slag Company → OGLETOWN QUARRY; 1989-10-01 to 1992-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → OGLETOWN QUARRY; 1989-10-01 to 1992-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Standard Slag Company; 1989-10-01 to 1992-01-15; source msha-controller-operator-history
- **operator_operates_mine:** New Enterprise Stone & Lime Company Inc → OGLETOWN QUARRY; 1992-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** New Enterprise Stone & Lime Company Inc → New Enterprise Stone & Lime Company Inc; 1992-01-16 to current/open; source msha-controller-operator-history