# Relationship history for MSHA mine 0801405

Current hierarchy: **E R Jahna  Industries Inc → E R Jahna Industries Inc → Hilochee Sand 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:** E R Jahna  Industries Inc → Hilochee Sand Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Classic Golf Aggregate, LLC → Hilochee Sand Mine; 2015-06-19 to 2024-06-09; source msha-controller-operator-history
- **controller_controls_mine:** William  Horner et al → Hilochee Sand Mine; 2015-06-19 to 2017-04-18; source msha-controller-operator-history
- **controller_controls_operator:** William  Horner et al → Classic Golf Aggregate, LLC; 2015-06-19 to 2017-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Ellis  Brown → Hilochee Sand Mine; 2017-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ellis  Brown → Classic Golf Aggregate, LLC; 2017-04-19 to 2024-06-09; source msha-controller-operator-history
- **operator_operates_mine:** E R Jahna Industries Inc → Hilochee Sand Mine; 2024-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E R Jahna  Industries Inc → E R Jahna Industries Inc; 2024-06-10 to current/open; source msha-controller-operator-history