# Relationship history for MSHA mine 0504953

Current hierarchy: **Floyd L  Cook → C N C Dirt Movers, Inc. → Foster Canyon**

- 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

- **operator_operates_mine:** C N C Dirt Movers, Inc. → Foster Canyon; 2010-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Floyd L  Cook et al → Foster Canyon; 2010-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd L  Cook et al → C N C Dirt Movers, Inc.; 2010-04-27 to current/open; source msha-controller-operator-history