# Relationship history for MSHA mine 1001363

Current hierarchy: **CRH PLC → Idaho Concrete Company → Cottonwood 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Wel-Com Financial Services & M-K Holding Corp → Cottonwood Pit; 1950-01-01 to 2000-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Monroc Inc → Cottonwood Pit; 1978-03-09 to 2000-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Wel-Com Financial Services & M-K Holding Corp → Monroc Inc; 1978-03-09 to 2000-05-31; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Cottonwood Pit; 1986-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Cottonwood Pit; 2000-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monroc Inc → Cottonwood Pit; 2000-06-01 to 2003-08-20; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Monroc Inc; 2000-06-01 to 2003-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Concrete Company → Cottonwood Pit; 2003-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Idaho Concrete Company; 2003-08-21 to current/open; source msha-controller-operator-history