# Relationship history for MSHA mine 1202228

Current hierarchy: **Kibbey Timothy → Kibbey Excavating Inc → Middlefork Mine**

- 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:** Kibbey Excavating Inc → Middlefork Mine; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kibbey Timothy → Middlefork Mine; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kibbey Timothy → Kibbey Excavating Inc; 1998-03-01 to current/open; source msha-controller-operator-history