# Relationship history for MSHA mine 2401820

Current hierarchy: **CRH PLC → Montana Mtls & Cons → LS Jensen 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Hugh W  Frame → LS Jensen Wash Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George L  Jensen → LS Jensen Wash Plant; 1984-06-01 to 2000-04-07; source msha-controller-operator-history
- **operator_operates_mine:** American Asphalt Inc → LS Jensen Wash Plant; 1986-05-01 to 1994-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Hugh W  Frame → American Asphalt Inc; 1986-05-01 to 1994-08-10; source msha-controller-operator-history
- **operator_operates_mine:** L S Jensen & Sons Inc → LS Jensen Wash Plant; 1994-08-11 to 2000-04-07; source msha-controller-operator-history
- **controller_controls_operator:** George L  Jensen → L S Jensen & Sons Inc; 1994-08-11 to 2000-04-07; source msha-controller-operator-history
- **operator_operates_mine:** L S Jensen Construction → LS Jensen Wash Plant; 2000-04-08 to 2018-04-26; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → LS Jensen Wash Plant; 2000-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → L S Jensen Construction; 2000-04-08 to 2018-04-26; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → LS Jensen Wash Plant; 2002-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Montana Mtls & Cons → LS Jensen Wash Plant; 2018-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Montana Mtls & Cons; 2018-04-27 to current/open; source msha-controller-operator-history