# Relationship history for MSHA mine 4101238

Current hierarchy: **Redland Plc → S T C C Inc → Counts**

- 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:** South Texas Construction Company → Counts; 1950-01-01 to 1991-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Basic Industries Inc → Counts; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Basic Industries Inc → South Texas Construction Company; 1950-01-01 to 1991-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → Counts; 1990-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S T C C Inc → Counts; 1991-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → S T C C Inc; 1991-01-04 to current/open; source msha-controller-operator-history