# Relationship history for MSHA mine 4104116

Current hierarchy: **Tarrant Acquisition Ltd → Metroplex Sand & Gravel LTD → Metroplex Sand & Gravel LTD**

- 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:** Metroplex Sand & Gravel LTD → Metroplex Sand & Gravel LTD; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tarrant Acquisition Ltd Et Al → Metroplex Sand & Gravel LTD; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tarrant Acquisition Ltd Et Al → Metroplex Sand & Gravel LTD; 1999-11-01 to current/open; source msha-controller-operator-history