# Relationship history for MSHA mine 3610372

Current hierarchy: **Brian J  Nichols; Dale A  Garnett → G & N ENTERPRISES INC → TRI COUNTY**

- 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:** Brian J  Nichols  et al → TRI COUNTY; 2007-06-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ATC Natural Stone → TRI COUNTY; 2021-10-06 to 2023-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Jorge Armando Tobon Cruz → TRI COUNTY; 2021-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jorge Armando Tobon Cruz → ATC Natural Stone; 2021-10-06 to 2023-10-03; source msha-controller-operator-history
- **operator_operates_mine:** G & N Enterprises Inc → TRI COUNTY; 2023-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian J  Nichols  et al → G & N Enterprises Inc; 2023-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Garnett  et al → G & N Enterprises Inc; 2023-10-04 to current/open; source msha-controller-operator-history