# Relationship history for MSHA mine 4801384

Current hierarchy: **Redland Plc → Sterling Paving Company → 11001 Crusher**

- 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:** Sterling Companies → 11001 Crusher; 1983-06-01 to 1987-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Koppers Company Inc → 11001 Crusher; 1983-06-01 to 1987-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Company Inc → Sterling Companies; 1983-06-01 to 1987-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Koppers Co Inc & Redland Plc → 11001 Crusher; 1987-04-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sterling Paving Company → 11001 Crusher; 1987-09-14 to 1988-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Koppers Co Inc & Redland Plc → Sterling Paving Company; 1987-09-14 to 1988-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Sterling Paving Company → 11001 Crusher; 1988-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → 11001 Crusher; 1988-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Sterling Paving Company; 1988-06-14 to current/open; source msha-controller-operator-history