# Relationship history for MSHA mine 0801473

Current hierarchy: **E R Jahna  Industries Inc → ER Jahna Industries Inc. → Van Fleet**

- 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:** E R Jahna  Industries Inc → Van Fleet; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ER Jahna Industries Inc. → Van Fleet; 2026-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E R Jahna  Industries Inc → ER Jahna Industries Inc.; 2026-08-04 to current/open; source msha-controller-operator-history