# Relationship history for MSHA mine 1511939

Current hierarchy: **Jasper Clyde → Jasper Deep Mining Inc → Jasper Deep Mine #2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Jasper Clyde Et Al → Jasper Deep Mine #2; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jasper Deep Mining Inc → Jasper Deep Mine #2; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jasper Clyde Et Al → Jasper Deep Mining Inc; 1979-06-01 to current/open; source msha-controller-operator-history