# Relationship history for MSHA mine 1510280

Current hierarchy: **Shoker G S → Shoker International Fuels Inc → No 1 Tipple**

- 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:** Shoker International Fuels Inc → No 1 Tipple; 1977-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shoker G S → No 1 Tipple; 1977-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shoker G S → Shoker International Fuels Inc; 1977-01-01 to current/open; source msha-controller-operator-history