# Relationship history for MSHA mine 2402418

Current hierarchy: **Geoff D  Nestor → Stone Yard → Montana Bronze**

- 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:** Montana Rock & Fab → Montana Bronze; 2005-08-03 to 2006-10-11; source msha-controller-operator-history
- **controller_controls_mine:** James A Decker → Montana Bronze; 2005-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A Decker → Montana Rock & Fab; 2005-08-03 to 2006-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Stone Yard → Montana Bronze; 2006-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Geoff D  Nestor → Montana Bronze; 2006-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geoff D  Nestor → Stone Yard; 2006-10-12 to current/open; source msha-controller-operator-history