# Relationship history for MSHA mine 4702796

Current hierarchy: **Tim L  Becken; Thorwald L  Becken → Cemstone Ready Mix → WI Portable Crusher 359 (A5529 Cone)**

- 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

- **controller_controls_mine:** Tim L Becken et al → WI Portable Crusher 359 (A5529 Cone); 1979-07-10 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Dennis L  Nordstrand → WI Portable Crusher 359 (A5529 Cone); 1984-02-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Yellow River Supply Corp → WI Portable Crusher 359 (A5529 Cone); 1985-07-01 to 2001-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Dennis L  Nordstrand → Yellow River Supply Corp; 1985-07-01 to 2001-04-08; source msha-controller-operator-history
- **operator_operates_mine:** Yellow River Supply Corp → WI Portable Crusher 359 (A5529 Cone); 2001-04-09 to 2004-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Hammond T Becken et al → WI Portable Crusher 359 (A5529 Cone); 2001-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hammond T Becken et al → Yellow River Supply Corp; 2001-04-09 to 2004-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Tim L Becken et al → Yellow River Supply Corp; 2001-04-09 to 2004-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Cemstone Ready Mix → WI Portable Crusher 359 (A5529 Cone); 2004-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim L Becken et al → Cemstone Ready Mix; 2004-04-01 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Hammond T Becken et al → Cemstone Ready Mix; 2004-04-01 to 2024-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Thorwald L  Becken et al → WI Portable Crusher 359 (A5529 Cone); 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thorwald L  Becken et al → Cemstone Ready Mix; 2024-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim L  Becken et al → Cemstone Ready Mix; 2024-10-01 to current/open; source msha-controller-operator-history