# Relationship history for MSHA mine 3002949

Current hierarchy: **R T Vanderbilt Company Inc → R.T.Vanderbilt Co,  Gouverneur Mineral Division → NO. 4 MINE**

- 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:** R T Vanderbilt Company Inc → NO. 4 MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gouverneur Talc Company Inc → NO. 4 MINE; 1990-04-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_operator:** R T Vanderbilt Company Inc → Gouverneur Talc Company Inc; 1990-04-01 to 2006-12-31; source msha-controller-operator-history
- **operator_operates_mine:** R.T.Vanderbilt Co,  Gouverneur Mineral Division → NO. 4 MINE; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R T Vanderbilt Company Inc → NO. 4 MINE; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R T Vanderbilt Company Inc → R.T.Vanderbilt Co,  Gouverneur Mineral Division; 2007-01-01 to current/open; source msha-controller-operator-history