# Relationship history for MSHA mine 2000881

Current hierarchy: **John L  Fiddler → Kuert Concrete Inc → Whit-Pond Pit And Mill**

- 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:** Kuert Concrete Inc → Whit-Pond Pit And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John L  Fiddler  et al → Whit-Pond Pit And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John L  Fiddler  et al → Kuert Concrete Inc; 1950-01-01 to current/open; source msha-controller-operator-history