# Relationship history for MSHA mine 0405346

Current hierarchy: **Caleb  Holland → Sierra Cascade Aggregate & Asphalt Products Inc → Feather River Rock South Chester Pit**

- 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:** MDU Resources Group Inc → Feather River Rock South Chester Pit; 1996-08-01 to 2023-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Baldwin Contracting Company Inc → Feather River Rock South Chester Pit; 1998-03-01 to 2009-03-31; source msha-controller-operator-history
- **controller_controls_operator:** MDU Resources Group Inc → Baldwin Contracting Company Inc; 1998-03-01 to 2009-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Caleb  Holland et al → Feather River Rock South Chester Pit; 2008-05-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sierra Cascade Aggregate & Asphalt Products LLC → Feather River Rock South Chester Pit; 2009-04-01 to 2025-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Caleb  Holland et al → Sierra Cascade Aggregate & Asphalt Products LLC; 2009-04-01 to 2025-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Deanna  Welch → Sierra Cascade Aggregate & Asphalt Products LLC; 2009-04-01 to 2025-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Caleb  Holland → Feather River Rock South Chester Pit; 2016-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Knife River Corporation → Feather River Rock South Chester Pit; 2023-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knife River Corporation → Baldwin Contracting Company Inc; 2023-06-01 to 2009-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Sierra Cascade Aggregate & Asphalt Products Inc → Feather River Rock South Chester Pit; 2025-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Caleb  Holland → Sierra Cascade Aggregate & Asphalt Products Inc; 2025-01-30 to current/open; source msha-controller-operator-history