# Relationship history for MSHA mine 4500652

Current hierarchy: **Lakeside Industries Inc. → Lakeside Industries, Inc → Issaquah Pit & Plant**

- 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:** Lakeside Industries Inc. et al → Issaquah Pit & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lakeside Sand & Gravel Company Inc → Issaquah Pit & Plant; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Patricia A  Burke → Issaquah Pit & Plant; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Patricia A  Burke → Lakeside Sand & Gravel Company Inc; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Lakeside Industries → Issaquah Pit & Plant; 1990-04-01 to 2008-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Lakeside Industries Inc. et al → Lakeside Industries; 1990-04-01 to 2008-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Lakeside Industries, Inc → Issaquah Pit & Plant; 2008-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lakeside Industries Inc. et al → Issaquah Pit & Plant; 2008-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lakeside Industries Inc. et al → Lakeside Industries, Inc; 2008-07-01 to current/open; source msha-controller-operator-history