# Relationship history for MSHA mine 2402078

Current hierarchy: **Colas S A → Simon Contractors → Portable 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:** James P Lynch → Portable Wash Plant; 1987-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Portable Wash Plant; 1995-01-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pack & Company/Nupac → Portable Wash Plant; 1995-05-01 to 2002-12-14; source msha-controller-operator-history
- **controller_controls_operator:** James P Lynch → Pack & Company/Nupac; 1995-05-01 to 2002-12-14; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Portable Wash Plant; 2002-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** NUPAC Incorporated → Portable Wash Plant; 2002-12-15 to 2009-01-21; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Portable Wash Plant; 2002-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → NUPAC Incorporated; 2002-12-15 to 2009-01-21; source msha-controller-operator-history
- **operator_operates_mine:** NUPAC Incorporated → Portable Wash Plant; 2009-01-22 to 2012-06-24; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → NUPAC Incorporated; 2009-01-22 to 2012-06-24; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Portable Wash Plant; 2009-03-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Intermountain Construction And Materials → Portable Wash Plant; 2012-06-25 to 2015-03-29; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Intermountain Construction And Materials; 2012-06-25 to 2015-03-29; source msha-controller-operator-history
- **operator_operates_mine:** Simon Contractors → Portable Wash Plant; 2015-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Simon Contractors; 2015-03-30 to current/open; source msha-controller-operator-history