# Relationship history for MSHA mine 4002750

Current hierarchy: **NOVADX  Ventures Corporation → TIACME, LLC → Rex Mine No.1**

- 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:** Dove Mining Company Inc → Rex Mine No.1; 1981-10-01 to 1984-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Salak Robert C → Rex Mine No.1; 1981-10-01 to 1984-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Salak Robert C → Dove Mining Company Inc; 1981-10-01 to 1984-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Bradley Equipment Company Inc → Rex Mine No.1; 1983-07-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dmc Energy Inc → Rex Mine No.1; 1984-10-19 to 1986-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Bradley Equipment Company Inc → Dmc Energy Inc; 1984-10-19 to 1986-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Rex Mining Inc → Rex Mine No.1; 1986-07-01 to 2011-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → Rex Mine No.1; 1986-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Rex Mining Inc; 1986-07-01 to 2011-03-20; source msha-controller-operator-history
- **operator_operates_mine:** TIACME, LLC → Rex Mine No.1; 2011-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** NOVADX  Ventures Corporation → Rex Mine No.1; 2011-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NOVADX  Ventures Corporation → TIACME, LLC; 2011-03-21 to current/open; source msha-controller-operator-history