# Relationship history for MSHA mine 4703069

Current hierarchy: **Tim L  Becken; Thorwald L  Becken → Cemstone Ready Mix Inc → WI Portable Wash (A1281 Wash Plant)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Tim L Becken et al → WI Portable Wash (A1281 Wash Plant); 1950-01-01 to 2025-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Tim L Becken et al → WI Portable Wash (A1281 Wash Plant); 1979-07-10 to 2024-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Cemstone Products Company → WI Portable Wash (A1281 Wash Plant); 1996-06-01 to 2005-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Tim L Becken et al → Cemstone Products Company; 1996-06-01 to 2005-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Hammond T Becken et al → Cemstone Products Company; 1996-06-01 to 2005-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Cemstone Ready Mix Inc → WI Portable Wash (A1281 Wash Plant); 2005-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim L Becken et al → Cemstone Ready Mix Inc; 2005-02-07 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Hammond T Becken et al → Cemstone Ready Mix Inc; 2005-02-07 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Tim L  Becken et al → WI Portable Wash (A1281 Wash Plant); 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim L  Becken et al → Cemstone Ready Mix Inc; 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thorwald L  Becken et al → Cemstone Ready Mix Inc; 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thorwald L  Becken et al → WI Portable Wash (A1281 Wash Plant); 2025-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thorwald L  Becken et al → Cemstone Products Company; 2025-08-18 to 2005-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Tim L  Becken et al → Cemstone Products Company; 2025-08-18 to 2005-02-06; source msha-controller-operator-history