# Relationship history for MSHA mine 1519210

Current hierarchy: **Jerry  Leach; Kennith M  Miller → T&T Quarry → T&T Quarry, LLC**

- 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

- **operator_operates_mine:** T&T Stone, Inc. → T&T Quarry, LLC; 2008-05-23 to 2009-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Phillips et al → T&T Quarry, LLC; 2008-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Phillips et al → T&T Stone, Inc.; 2008-05-23 to 2009-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Tommy Ray  Bowlin et al → T&T Stone, Inc.; 2008-05-23 to 2009-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Douglas et al → T&T Stone, Inc.; 2008-05-23 to 2009-08-18; source msha-controller-operator-history
- **operator_operates_mine:** T&T Quarry → T&T Quarry, LLC; 2009-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Leach et al → T&T Quarry, LLC; 2009-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Leach et al → T&T Quarry; 2009-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kennith M  Miller et al → T&T Quarry; 2009-08-19 to current/open; source msha-controller-operator-history