# Relationship history for MSHA mine 2302259

Current hierarchy: **CRH PLC → Apac-Missouri Inc → Nordberg 1213 LT**

- 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:** Ashland Inc → Nordberg 1213 LT; 1998-02-03 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Apac-Missouri Inc → Nordberg 1213 LT; 2001-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac-Missouri Inc; 2001-08-23 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Nordberg 1213 LT; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Apac-Missouri Inc; 2006-08-28 to current/open; source msha-controller-operator-history