# Relationship history for MSHA mine 3608817

Current hierarchy: **Jorge Armando Tobon Cruz → ATC Natural Stone → TAYLOR HILL 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Timothy M  Smith → TAYLOR HILL QUARRY; 1997-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy M  Smith → TAYLOR HILL QUARRY; 1999-09-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Timothy M Smith → TAYLOR HILL QUARRY; 1999-10-01 to 2006-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Timothy M  Smith → Timothy M Smith; 1999-10-01 to 2006-04-10; source msha-controller-operator-history
- **operator_operates_mine:** B S Quarries Inc → TAYLOR HILL QUARRY; 2006-04-11 to 2024-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Timothy M  Smith → B S Quarries Inc; 2006-04-11 to 2024-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Jorge Armando Tobon Cruz → TAYLOR HILL QUARRY; 2021-10-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** PA Bluestone Supply LLC → TAYLOR HILL QUARRY; 2024-06-05 to 2026-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Kann et al → TAYLOR HILL QUARRY; 2024-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Kann et al → PA Bluestone Supply LLC; 2024-06-05 to 2026-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Rodney  Frey et al → PA Bluestone Supply LLC; 2024-06-05 to 2026-08-23; source msha-controller-operator-history
- **operator_operates_mine:** ATC Natural Stone → TAYLOR HILL QUARRY; 2026-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jorge Armando Tobon Cruz → ATC Natural Stone; 2026-08-24 to current/open; source msha-controller-operator-history