# Relationship history for MSHA mine 4103090

Current hierarchy: **Redland Plc → Redland Stone Products Company → Kosse Quarry**

- 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:** Redland Plc → Kosse Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Downing Brothers Inc → Kosse Quarry; 1981-06-01 to 1985-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Downing R P → Kosse Quarry; 1981-06-01 to 1985-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Downing R P → Downing Brothers Inc; 1981-06-01 to 1985-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Redland Stone Products Company → Kosse Quarry; 1985-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Redland Stone Products Company; 1985-12-05 to current/open; source msha-controller-operator-history