# Relationship history for MSHA mine 1510422

Current hierarchy: **Seals Frank → Seals Coal Co Inc → No 10 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

- **controller_controls_mine:** Seals Frank → No 10 Mine; 1970-01-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Seals Coal Co Inc → No 10 Mine; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Seals Frank → Seals Coal Co Inc; 1977-05-01 to current/open; source msha-controller-operator-history