# Relationship history for MSHA mine 4003421

Current hierarchy: **NOVADX  Ventures Corporation → TIACME, LLC → Low Ash Coal Facility**

- 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:** NOVADX  Ventures Corporation → Low Ash Coal Facility; 2011-03-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TIACME, LLC → Low Ash Coal Facility; 2012-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NOVADX  Ventures Corporation → TIACME, LLC; 2012-04-01 to current/open; source msha-controller-operator-history