# Relationship history for MSHA mine 1000373

Current hierarchy: **CRH PLC → Idaho Materials and Construction → Pocatello 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Bannock Paving Company Inc → Pocatello Wash Plant; 1950-01-01 to 2012-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Parson Jack B Companies → Pocatello Wash Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parson Jack B Companies → Bannock Paving Company Inc; 1950-01-01 to 2012-06-19; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Pocatello Wash Plant; 2000-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Pocatello Wash Plant; 2002-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Staker & Parson Co. → Pocatello Wash Plant; 2012-06-20 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Staker & Parson Co.; 2012-06-20 to 2021-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Materials and Construction → Pocatello Wash Plant; 2021-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Idaho Materials and Construction; 2021-05-01 to current/open; source msha-controller-operator-history