# Relationship history for MSHA mine 3610037

Current hierarchy: **Christopher J Insinger → Insinger Excavating Inc → Big Pond 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:** John  Insinger → Big Pond Quarry; 2009-05-15 to 2024-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Insinger Excavating → Big Pond Quarry; 2012-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Insinger → Insinger Excavating; 2012-11-28 to 2024-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Christopher J Insinger → Big Pond Quarry; 2024-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher J Insinger → Insinger Excavating; 2024-02-08 to current/open; source msha-controller-operator-history