# Relationship history for MSHA mine 3002612

Current hierarchy: **Tracy L  Pinney → O'Tooles Stone & Gravel → O'Tooles Stone & Gravel**

- 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

- **operator_operates_mine:** Town Of Niles → O'Tooles Stone & Gravel; 1981-07-01 to 2016-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Niles → O'Tooles Stone & Gravel; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Niles → Town Of Niles; 1981-07-01 to 2016-10-13; source msha-controller-operator-history
- **operator_operates_mine:** O'Tooles Stone & Gravel → O'Tooles Stone & Gravel; 2016-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tracy L  Pinney → O'Tooles Stone & Gravel; 2016-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tracy L  Pinney → O'Tooles Stone & Gravel; 2016-10-14 to current/open; source msha-controller-operator-history