# Relationship history for MSHA mine 4105872

Current hierarchy: **Rasmussen Group Inc → RGI Materials Inc → Trinity Pit**

- 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:** Rasmussen Group Inc → Trinity Pit; 2001-08-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** RGI Materials Inc → Trinity Pit; 2026-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rasmussen Group Inc → RGI Materials Inc; 2026-04-09 to current/open; source msha-controller-operator-history