# Relationship history for MSHA mine 3401709

Current hierarchy: **Robert G  Thompson → Green Country Stone Inc → Green Country Stone**

- 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:** Neff Building Stone Supply → Green Country Stone; 1990-02-01 to 1992-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Jerry D Neff → Green Country Stone; 1990-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry D Neff → Neff Building Stone Supply; 1990-02-01 to 1992-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Green Country Stone Inc → Green Country Stone; 1992-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert G  Thompson → Green Country Stone; 1992-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert G  Thompson → Green Country Stone Inc; 1992-08-17 to current/open; source msha-controller-operator-history