# Relationship history for MSHA mine 1510870

Current hierarchy: **Jasper Clyde → Jasper Brothers Inc → No 2 Surface**

- 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:** Jasper Brothers Inc → No 2 Surface; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jasper Clyde Et Al → No 2 Surface; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jasper Clyde Et Al → Jasper Brothers Inc; 1977-11-01 to current/open; source msha-controller-operator-history