# Relationship history for MSHA mine 2402560

Current hierarchy: **Thomas W Mazza → F & R LLC → Munis Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** F & R LLC → Munis Pit; 2009-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard C.  Bossard et al → Munis Pit; 2009-10-16 to 2024-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Richard C.  Bossard et al → F & R LLC; 2009-10-16 to 2024-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Floyd C.  Bossard et al → F & R LLC; 2009-10-16 to 2024-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas W Mazza → Munis Pit; 2024-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas W Mazza → F & R LLC; 2024-01-15 to current/open; source msha-controller-operator-history