# Relationship history for MSHA mine 2402504

Current hierarchy: **Don  Felstet → Felstet Concrete Products LLC → Plains State Screen**

- 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:** Don  Felstet → Plains State Screen; 2002-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Felstet Concrete Products LLC → Plains State Screen; 2009-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Felstet → Felstet Concrete Products LLC; 2009-04-10 to current/open; source msha-controller-operator-history