# Relationship history for MSHA mine 2602140

Current hierarchy: **Fairbanks R L & James Cudney → Fairbanks R & D → Blue Jay 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Fairbanks R & D → Blue Jay Mine; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fairbanks R L & James Cudney Et Al → Blue Jay Mine; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fairbanks R L & James Cudney Et Al → Fairbanks R & D; 1990-01-01 to current/open; source msha-controller-operator-history