# Relationship history for MSHA mine 3402035

Current hierarchy: **Jace D  Tanguay → Corner Stone Quarries Inc → Corner Stone #2**

- 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:** Jace  Tanguay  et al → Corner Stone #2; 2002-10-03 to 2014-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Corner Stone Quarries Inc → Corner Stone #2; 2007-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jace  Tanguay  et al → Corner Stone Quarries Inc; 2007-05-18 to 2014-05-01; source msha-controller-operator-history
- **controller_controls_operator:** W D  Peterson  et al → Corner Stone Quarries Inc; 2007-05-18 to 2014-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Jace D  Tanguay → Corner Stone #2; 2014-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jace D  Tanguay → Corner Stone Quarries Inc; 2014-05-02 to current/open; source msha-controller-operator-history