# Relationship history for MSHA mine 1515296

Current hierarchy: **Jarboe James D → Tenn Ky Blue Gem Inc → No 2 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:** Tenn Ky Blue Gem Inc → No 2 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jarboe James D → No 2 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jarboe James D → Tenn Ky Blue Gem Inc; 1985-07-01 to current/open; source msha-controller-operator-history