# Relationship history for MSHA mine 1401647

Current hierarchy: **Eric H  Bettis; Matt  McPherson → Mid-States Materials LLC → Coolidge Sand 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:** Eric H  Bettis et al → Coolidge Sand Plant; 2004-01-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mid-States Materials LLC → Coolidge Sand Plant; 2005-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric H  Bettis et al → Mid-States Materials LLC; 2005-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  McPherson et al → Mid-States Materials LLC; 2005-10-01 to current/open; source msha-controller-operator-history